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The device is a universal measurement
device for low voltage distribution systems,
which

• measures and calculates electrical variables

such as voltage, current, power, energy,
harmonics, etc. in building installations, on
distribution units, circuit breakers and busbar
trunking systems.

• transmits measurement results via interface.

The device will be installed in switch cabinets or
in small installation distributors per DIN 43880
on a 35 mm mounting rail per DIN EN 60715.

• The device fulfi ls the application conditions

of DIN IEC 60721-3-3 and is intended for
permanent installation in locations that are
protected from the weather.

• It can be installed in any mounting position.
• Forced ventilation is not required.

Deutsche V

ersion:

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User manual:

Janitza electronics GmbH
Vor dem Polstück 6
D-35633 Lahnau / Germany
Support tel. +49 6441 9642-22
Fax +49 6441 9642-30
e-mail: [email protected]
Website: http://www.janitza.com

www

.janitza.com

Brief description of device

Assembly

Fig. Device on
mounting rail per
DIN EN 60715.

Connecting the supply voltage

WARNING!

Danger of injury due to
electrical voltage!

Serious bodily injury or death can result from:

• Contact with bare or stripped live wires.
• Device inputs that are dangerous to touch.

Render the system free of voltage before
starting work! Check the system is free of
electrical energy!

The device derives its supply voltage from the
measurement voltage L1-N, L2-N and L3-N.
In doing so, at least one phase lies within the
nominal voltage range.
The device requires a voltage of at least 100 Veff
in at least one phase (L-N) for operation.

Current measurement

The device

• is only approved for measuring current with

a current transformer.

• is intended for the connection of current

transformers with secondary currents of
../1 A and ../5 A.

• has the current transformer ratio set to 5/5 A

as standard.

• The current transformers must have a base

insulation according to IEC 61010-1: 2010
for the nominal voltage of the circuit.

WARNING!

Danger of injury due to
electrical voltage!

Serious bodily injury or death
can result from:

• Contact with bare or stripped live wires.
• Current measurement inputs on the device

and on the current transformer that are
dangerous to touch.

Render the system free of voltage before
starting work! Check the system is free of
electrical energy!
Earth the system! Use the earth connection
points with earthing symbols for this!
Earth the secondary windings of current
transformers and all of the metal parts of
the transformer that could be touched!



NOTE!

• Further information on current trans-

formers can be found in the user
manual.

• Current transformer ratios can be

confi gured via the software.

Consumer

Connection "Current measurement via current
transformers".

Three-phase, four-conductor

system

Single-phase, three-conductor

system

Voltage measurement in the

three-phase, four-conductor system

Voltage measurement in the

single-phase, three-conductor system

Connection variants for voltage measurement



NOTE!
Because the device derives the supply
voltage from the measured voltage and
burdens the voltage transformer with
a non-linear current, the device is only
partially suitable for use in medium and
high voltage networks.



NOTE!
Voltage transformer ratios can be
confi gured via the software.

Technical data

1 2

4
67

1 2

4
67

x10

(10-90)

(1-9)

The green LED illuminates. Measurement
and supply voltages lie within the operating
voltage range. The device is operational.
The LED fl ashes for 0.5 sec. every 5 secs.

Both LEDs light up. The device is ready
for operation. At least one measurement
voltage or the supply voltage is below the
operating voltage range.

The green LED fl ashes.
Data transfer (RS485) is active.

The LEDs fl ash at the same time.
The data transfer (RS485) is faulty.

The red LED illuminates. Fault in the device!
Have the device checked by the manufacturer!

The red LED fl ashes. At least one current
measurement input or voltage measurement
input exceeds the measurement range.

The LEDs fl ash alternately.
Firmware checksum fault! Operation is
interrupted! Carry out a fi rmware update!

Connections and control elements

Current measurement connection

Coding switches
You can confi gure the device address with the
coding switches as follows:

Confi gure the device addresses in
the range of 01 to 99 with the coding
switches.
The device address 00 is reserved for
service purposes (further information
in the user manual).

LEDs

L1 L2 L3 N

Voltage measurement

The device derives its supply voltage from the
measured voltage.

CAUTION!

Danger of injury or damage
to the device

Disregard of the connection conditions for
the voltage measurement inputs can result in
injuries or to the device being damaged.
For this reason, note that:

•

The voltage measurement inputs

are not connected to DC voltage.

are equipped with a suitable, labelled
fuse located in the vicinity and
isolation device (alternative: circuit
breaker) located nearby.

are dangerous to touch.

•

Voltages that exceed the allowed rated
network voltages must be connected via
a voltage transformer.

•

Measured voltages and measured currents
must derive from the same network.

Disconnectors

Fuse (UL/IEC listed)

Load

• The device measures voltages L-N up to 277 V

and L-L up to 480 V.

• The measurement and surge voltages meet

overvoltage category 300 V CATIII.



NOTE!

• A circuit breaker can be used as an al-

ternative to a fuse and isolating device.

• If the range is exceeded, the red LED

fl ashes (see step „connections and
controls“).

Typical connection variants

The following schematic shows a typical connection variant for the device with:

•  Supply voltage and voltage measurement.
•  Current measurement.
•  RS485 interface with Modbus RTU protocol.

Connection
variant in the
"Three-phase,
four-conductor system".



NOTE!
Further technical data can be found in
the user manual for the device.

(gedrehtes Patchkabel)

RS485

PC/

GridVis®

RS485

RS232 RS232

Fig. UMG 103-CBM



NOTE!
Install the “GridVis®” software on the PC
to be used!

(gedrehtes Patchkabel)

USB

RS485

RS485

USB

PC/

GridVis®

(gedrehtes Patchkabel)

Connection of the device
via an UMG 604 as gateway.

UMG 604

RS485

Ethernet

RS485

PC/

GridVis®

Establish connection to PC

The 3 most common connections for communication
between PC and device are described in the following:

Device connection via interface
converter.

UMG 103-CBM

The PC connection of the device via the RS485
serial interface with, for example, an UMG 604
as gateway (see step “Established connection to
PC”) is a method

• for confi guring the device(s)
• and reading out data.

e.g. connection to the
UMG 604 as gateway
(Master)

Example: PC connection via RS485 interface and UMG 604 as gateway

e.g. connection
to further
Slave devices

RS485 bus structure

• In an RS485 bus structure (line), you connect

all devices in accordance with the Master-Slave
principle.

• One segment of an RS485 bus structure can

include up to 32 subscribers/devices.

• Terminate the cable at the start and end of a

segment with termination resistors (120 Ω, 0.25 W).
The device has no termination resistor.

• With more than 32 subscribers, repeaters must

be used to connect segments.

Correct

Incorrect

Terminal strip (switch cabinet).

Device with RS485 interface
(without termination resistor).

Device with RS485 interface
(termination resistor on the
device).



NOTE!
The coding switches can be used in the
RS485 bus structure to allocate the Slave
devices (UMG 103-CBM)

• different device addresses.
• different device addresses to the Master

device (UMG 604).

The UMG 103-CBM detects the transmission
speed (Baud rate) automatically!

Three-phase, four-conductor

system

Single-phase, three-conductor

system

Current measurement via current

transformer in three-phase,

four-conductor system

Current measurement in the

single-phase, three-conductor

system

Three-phase,

four-conductor system

Current measurement via

2 current transformers in three-

phase, four-conductor system

Connection variants for current measurement



NOTE!
If the range is exceeded, the red LED
fl ashes. (see Step „connections and
control elements“)

Dok Nr

. 2.057.002.0.d

Art. Nr

. 33.03.345

Mains systems

Suitable mains systems and max. rated voltages (DIN EN 61010-1/A1):

The device can be used in

• TN and TT networks
• in residential and industrial applications.

Three-phase, four-conductor systems

with earthed neutral conductor

Three-phase, four-conductor systems

with non-earthed neutral conductor

L1
L2

L3
E

L1
L2

L3
E

L2
L3
E

L2
E

N
E

L2
L3
E

L1
L2

L3
E

L1
L2

L3
E

L2
L3
E

L2
E

N
E

L2
L3
E

L-N

/ U

L-L

277 VLN / 480 VLL

Connect in this grid system,

the device only using a voltage

transformer!

Disclaimer

The observance of the information products for
the devices is a prerequisite for safe operation
and to achieve the stipulated performance
characteristics and product characteristics.
Janitza electronics GmbH accepts no liability
for injuries to personnel, property damage
or fi nancial losses arising due to a failure to
comply with the information products. Ensure
that your information products are accessible
and legible.

Further information can be found on our web-
site www.janitza.com at Support > Downloads.

© 2016 - Janitza electronics GmbH - Lahnau.
All rights reserved. Duplication, editing,
distribution and any form of exploitation, also
as excerpts, is prohibited.

Subject to technical amendments

• Make sure that your device agrees with the

installation manual.

• Read and understand fi rst product-related

documents.

• Keep product supporting documentation

throughout the life available and, where ap-
propriate, to pass on to subsequent users.

• Please inform yourself about device revisi-

ons and the associated adjustments to the
product-related documentation on
www.janitza.com.

Disposal

Please observe national regulations!
If disposing of individual parts, please dispose
of them in accordance with their nature and
existing country-specifi c regulations, for
example as:

•  Electrical scrap
•  Plastics
•  Metals

Or, task a certifi ed disposal business with the
scrapping.

Relevant laws, applied standards and
directives

The laws, standards and directives for the
device applied by Janitza electronic GmbH
can be found in the declaration of conformity
on our website.

General

Safety

Safety information
The installation manual does not represent a full
listing of all necessary safety measures required
for safe operation of the device.
Certain operating conditions may require further
measures. The installation manual contains
information that you must observe for your
own personal safety and to avoid damage to
property.

Symbols used:

This symbol is used as an addition
to the safety instructions and
warns of an electrical hazard.

This symbol is used as an addition
to the safety instructions and
warns of a potential hazard.



This symbol with the word

NOTE!

describes:

• Procedures that do not entail

any danger of injury.

• Important information,

procedures or handling steps.

Safety instructions are highlighted with
a warning triangle and shown as follows,
depending on the degree of hazard:

DANGER!

Indicates an immediately
threatening hazard that leads to
serious or even fatal injuries.

WARNING!

Indicates a potentially hazardous
situation that could lead to
serious or even fatal injuries.

CAUTION!

Indicates a potentially hazardous
situation that could lead to minor
injuries or damage to property.

Measures for safety
When operating electrical devices certain parts
of these devices inevitable carry dangerous
voltages. This could result in serious bodily
injury or damage to property if not handled
properly:

• Before establishing electrical connections

to the device, earth it at the ground wire
connection if there is one.

• Hazardous voltages may arise in all circuit

parts that are connected to the power supply.

• Even after disconnecting the supply voltage,

there may still be hazardous voltages
present in the device (capacitor storage).

• Do not operate equipment with current

transformer circuits when open.

• Do not exceed the limit values stipulated in

the user manual and on the rating plate - even
during testing or commissioning.

• Observe the safety and warning information in

the documents that belong to the devices!

Qualifi ed personnel

In order to avoid injuries to personnel and
property damage, only qualifi ed personnel with
electrical training are permitted to work on the
devices with knowledge

• of the national regulations for accident

prevention

• of safety standards
• of installation, commissioning and operation

of the device.

Proper use

The device is

• intended for installation in switch cabinets

and small installation distributors (please
observe step 3 “Assembly”).

• not intended for installation in vehicles!

The use of the device in mobile equipment
is considered to be non-standard
environmental conditions and is therefore
only permitted after separate agreement.

• not intended for installation in environments

with hazardous oils, acids, gases, vapours,
dusts, radiation, etc.

The prerequisites of faultless, safe operation
of this device are proper transport and proper
storage, set-up, installation, operation and
maintenance.



NOTE!
For further information on device functions, data and assembly, see the user manual.

CAUTION!

Damage to property due to
disregard of the connection
conditions or impermissible
overvoltage!

Your device can be damaged or destroyed
by a failure to comply with the connection
conditions or by exceeding the permissible
voltage range.
Before connecting the device to the supply
voltage, please check:

•

Voltage and frequency correspond to the
details on the ratings plate! Limit values
stipulated in the user manual have been
complied with!

•

In building installations, the supply
voltage must be protected with a UL/IEC
approved circuit breaker / a fuse!

•

The isolation device

must be installed near the device
and in a location that is easily
accessible for the user.

must be labelled to identify the
respective device.

•

Do not tap the supply voltage from the
voltage transformer.

•

Provide a fuse for the neutral conductor
if the neutral conductor terminal of the
source is not grounded.

Connection variant "Direct voltage measurement
in the three-phase, four-conductor system".

Voltage measurement

3-phase, 4-conductor

systems with rated voltages

(L-N/L-L)

max. 277 V/480 V

Networks

Measurement in TT and TN
networks

Rated surge voltage

4 kV

Protection of

voltage measurement

1 - 10 A Trip characteristic B,

(With IEC / UL approval)

Overvoltage category

300 V CAT III

Resolution

0.01 V

Crest factor

2 (related to 240 Vrms)

Sampling rate

5.4 kHz

Frequency range of

the fundamental oscillation -
resolution

45 Hz .. 65 Hz
0.001 Hz

Fourier analysis

1.-25. Harmonic (all odd)

Current measurement

Nominal current

5 A

Rated current

6 A

Crest factor

2 (related to 6 Arms)

Resolution

0.1 mA

Measuring range

0.005 ... 6 Arms

Overvoltage category

300 V CAT II

Rated surge voltage

2 kV

Power consumption

approx 0.2 VA (Ri=5 mΩ)

Overload for 1 sec.

60 A (sinusoidal)

Sampling rate

5.4 kHz

Supply voltage

The device gets the supply voltage from the measuring voltage!
Supply from single phase

115 - 277 V (+-10%), 50/60 Hz

Supply from three phases

80 - 277 V (+-10%), 50/60 Hz

Power consumption

max. 1.5 VA

General information

Net weight

200 g

Device dimensions

h = 98 mm,

w = 71.5 mm,

d = 46 mm

Transport and storage

The following information applies to devices which are trans-

ported or stored in the original packaging.
Free fall

1 m

Temperature

-20° C to +70° C)

Ambient coditions during operation

The device

• weatherproof and use stationary!

• fulfi lls the conditions in accordance with DIN IEC 60721-3-3

• has protection class II according to IEC 60536 (VDE 0106,

part 1) and does not require a protective earth connection.

Operating temperature range

-25° C .. +60° C

Relative humidity

5 to 95% (at +25° C)

without condensation

Operating altitude

0 .. 2000 m above sea level

Degree of pollution

Housing fl ammability class

UL94V-0

Installed position

any

Fixing/mounting

35 mm top hat rail (according to

IEC/EN 60999-1, DIN EN 50022)

Stress by impact

2 joules, IK07 according to

IEC / EN61010-1: 2010

Ventilation

no external ventilation required.

Protection against ingress

of solid foreign bodies and

water

IP20 according to EN60529

September 2000,

IEC60529:1989

Terminal connection capacity

Conductors to be connected.

Only one conductor can be connected per terminal!
Single core, multi-core,

fi ne-stranded

0.08 - 2.5 mm

, AWG 28 - 12

Tightening torque

max. 0.5 Nm

Stripping length

min. 8 mm

RS485 interface

Protocol, modbus RTU

Modbus RTU/Slave

Transfer rate

9.6 kbps, 19.2 kbps,

38.4 kbps, 57.6 kbps,

115.2 kbps,

automatic detection

Procedure in the event of faults

Possible fault

Cause

Remedy

No LED lights

External fusing for the power supply voltage has tripped. Replace fuse.
Device is defective.

Send device to the manufacturer for repair.

Measured current is too large

or too small.

Current transformer factor is incorrectly programmed. Read out current transformer ratio and program with

the software GridVis.

Measured current is too

small.

Overrange.

Install current transformer with a larger current

transformer ratio.

The peak current value at the measurement input has

been exceeded by harmonic components.

Measured voltage is too large

or too small.

Measurement in the wrong phase.

Check connection and correct if necessary. (GridVis).

Voltage transformer incorrectly programmed.

Read out voltage transformer ratio and program with

the software GridVis.

Measured voltage is too

small.

Overrange.

Install voltage transformers.

The peak voltage value at the measurement input has

been exceeded by harmonic components.

Active power is too large or

too small.

The programmed current transformer transformation

ratio is incorrect.

Read out current transformer ratio and program with

the software GridVis.

The current path is assigned to the wrong voltage path. Check connection and correct if necessary. (GridVis).
The programmed voltage transformer transformation

ratio is incorrect.

Read out voltage transformer ratio and program with

the software GridVis.

Active power imported

supply / supply is reversed.

At least one current transformer connection is mixed

up/reversed.

Check connection using the software GridVis and

correct, if necessary.

A current path is assigned to the wrong voltage path.

No connection with the device. RS485: Device address is incorrect or wrong protocol.

Adjust the device address / select protocol.

Despite the measures above

the device does not work.

Device is defective.

Send device and error description to verify the

manufacturer.

*...

CAUTION!

Material damage from overloaded measurement inputs!

Too high current and voltage values overload the measurement inputs.

Observe the limits stated on the nameplate and in the user manual!

UMG 103-CBM

RS485

Data GND

Strommessung

Current measurement

Mess- und Versorgungsspannung

Measuring and supply voltage

Verbraucher

Load

Measurement data recording

Memory (Flash)

4 MB

(1024 Sectors a 4kB)

Record storage

(all profi les activated)

16000 records

Battery (soldered)

Typical life expectancy

BR 1632, 3V

8 - 10 years

RS485 bus

A
B

Data GND

Fig. UMG 103-CBM

WARNING!

Danger of injury due
to high currents and high
electrical voltages!

Current transformers operating with an open
secondary circuit (high voltage peaks) can
result in serious or even fatal injuries.
Avoid open operation of the current transformers
- short-circuit unloaded transformers!

Red LED

Green LED

Coding
switches
for setting the
device address

RS485
Interface

Connection of measurement
voltage and supply voltage

Power Analyser

UMG 103-CBM

Installation manual

• Installation
• Device settings

The device is a universal measurement
device for low voltage distribution systems,
which

• measures and calculates electrical variables

such as voltage, current, power, energy,
harmonics, etc. in building installations, on
distribution units, circuit breakers and busbar
trunking systems.

• transmits measurement results via interface.

The device will be installed in switch cabinets or
in small installation distributors per DIN 43880
on a 35 mm mounting rail per DIN EN 60715.

• The device fulfi ls the application conditions

of DIN IEC 60721-3-3 and is intended for
permanent installation in locations that are
protected from the weather.

• It can be installed in any mounting position.
• Forced ventilation is not required.

Deutsche V

ersion:

siehe V

derseite

User manual:

Janitza electronics GmbH
Vor dem Polstück 6
D-35633 Lahnau / Germany
Support tel. +49 6441 9642-22
Fax +49 6441 9642-30
e-mail: [email protected]
Website: http://www.janitza.com

www

.janitza.com

Brief description of device

Assembly

Fig. Device on
mounting rail per
DIN EN 60715.

Connecting the supply voltage

WARNING!

Danger of injury due to
electrical voltage!

Serious bodily injury or death can result from:

• Contact with bare or stripped live wires.
• Device inputs that are dangerous to touch.

Render the system free of voltage before
starting work! Check the system is free of
electrical energy!

Current measurement

The device

• is only approved for measuring current with

a current transformer.

• is intended for the connection of current

transformers with secondary currents of
../1 A and ../5 A.

• has the current transformer ratio set to 5/5 A

as standard.

• The current transformers must have a base

insulation according to IEC 61010-1: 2010
for the nominal voltage of the circuit.

WARNING!

Danger of injury due to
electrical voltage!

Serious bodily injury or death
can result from:

• Contact with bare or stripped live wires.
• Current measurement inputs on the device

and on the current transformer that are
dangerous to touch.



NOTE!

• Further information on current trans-

formers can be found in the user
manual.

• Current transformer ratios can be

confi gured via the software.

Consumer

Connection "Current measurement via current
transformers".

Three-phase, four-conductor

system

Single-phase, three-conductor

system

Voltage measurement in the

three-phase, four-conductor system

Voltage measurement in the

single-phase, three-conductor system

Connection variants for voltage measurement



NOTE!
Voltage transformer ratios can be
confi gured via the software.

Technical data

1 2

4
67

1 2

4
67

x10

(10-90)

(1-9)

The green LED illuminates. Measurement
and supply voltages lie within the operating
voltage range. The device is operational.
The LED fl ashes for 0.5 sec. every 5 secs.

Both LEDs light up. The device is ready
for operation. At least one measurement
voltage or the supply voltage is below the
operating voltage range.

The green LED fl ashes.
Data transfer (RS485) is active.

The LEDs fl ash at the same time.
The data transfer (RS485) is faulty.

The red LED illuminates. Fault in the device!
Have the device checked by the manufacturer!

The red LED fl ashes. At least one current
measurement input or voltage measurement
input exceeds the measurement range.

The LEDs fl ash alternately.
Firmware checksum fault! Operation is
interrupted! Carry out a fi rmware update!

Connections and control elements

Current measurement connection

Coding switches
You can confi gure the device address with the
coding switches as follows:

Confi gure the device addresses in
the range of 01 to 99 with the coding
switches.
The device address 00 is reserved for
service purposes (further information
in the user manual).

LEDs

L1 L2 L3 N

Voltage measurement

The device derives its supply voltage from the
measured voltage.

CAUTION!

Danger of injury or damage
to the device

Disregard of the connection conditions for
the voltage measurement inputs can result in
injuries or to the device being damaged.
For this reason, note that:

•

The voltage measurement inputs

are not connected to DC voltage.

are equipped with a suitable, labelled
fuse located in the vicinity and
isolation device (alternative: circuit
breaker) located nearby.

are dangerous to touch.

•

Voltages that exceed the allowed rated
network voltages must be connected via
a voltage transformer.

•

Measured voltages and measured currents
must derive from the same network.

Disconnectors

Fuse (UL/IEC listed)

Load

• The device measures voltages L-N up to 277 V

and L-L up to 480 V.

• The measurement and surge voltages meet

overvoltage category 300 V CATIII.



NOTE!

• A circuit breaker can be used as an al-

ternative to a fuse and isolating device.

• If the range is exceeded, the red LED

fl ashes (see step „connections and
controls“).

Typical connection variants

The following schematic shows a typical connection variant for the device with:

•  Supply voltage and voltage measurement.
•  Current measurement.
•  RS485 interface with Modbus RTU protocol.

Connection
variant in the
"Three-phase,
four-conductor system".



NOTE!
Further technical data can be found in
the user manual for the device.

(gedrehtes Patchkabel)

RS485

PC/

GridVis®

RS485

RS232 RS232

Fig. UMG 103-CBM



NOTE!
Install the “GridVis®” software on the PC
to be used!

(gedrehtes Patchkabel)

USB

RS485

RS485

USB

PC/

GridVis®

(gedrehtes Patchkabel)

Connection of the device
via an UMG 604 as gateway.

UMG 604

RS485

Ethernet

RS485

PC/

GridVis®

Establish connection to PC

The 3 most common connections for communication
between PC and device are described in the following:

Device connection via interface
converter.

UMG 103-CBM

The PC connection of the device via the RS485
serial interface with, for example, an UMG 604
as gateway (see step “Established connection to
PC”) is a method

• for confi guring the device(s)
• and reading out data.

e.g. connection to the
UMG 604 as gateway
(Master)

Example: PC connection via RS485 interface and UMG 604 as gateway

e.g. connection
to further
Slave devices

RS485 bus structure

• In an RS485 bus structure (line), you connect

all devices in accordance with the Master-Slave
principle.

• One segment of an RS485 bus structure can

include up to 32 subscribers/devices.

• Terminate the cable at the start and end of a

segment with termination resistors (120 Ω, 0.25 W).
The device has no termination resistor.

• With more than 32 subscribers, repeaters must

be used to connect segments.

Correct

Incorrect

Terminal strip (switch cabinet).

Device with RS485 interface
(without termination resistor).

Device with RS485 interface
(termination resistor on the
device).



NOTE!
The coding switches can be used in the
RS485 bus structure to allocate the Slave
devices (UMG 103-CBM)

• different device addresses.
• different device addresses to the Master

device (UMG 604).

The UMG 103-CBM detects the transmission
speed (Baud rate) automatically!

Three-phase, four-conductor

system

Single-phase, three-conductor

system

Current measurement via current

transformer in three-phase,

four-conductor system

Current measurement in the

single-phase, three-conductor

system

Three-phase,

four-conductor system

Current measurement via

2 current transformers in three-

phase, four-conductor system

Connection variants for current measurement



NOTE!
If the range is exceeded, the red LED
fl ashes. (see Step „connections and
control elements“)

Dok Nr

. 2.057.002.0.d

Art. Nr

. 33.03.345

Mains systems

Suitable mains systems and max. rated voltages (DIN EN 61010-1/A1):

The device can be used in

• TN and TT networks
• in residential and industrial applications.

Three-phase, four-conductor systems

with earthed neutral conductor

Three-phase, four-conductor systems

with non-earthed neutral conductor

L1
L2

L3
E

L1
L2

L3
E

L2
L3
E

L2
E

N
E

L2
L3
E

L1
L2

L3
E

L1
L2

L3
E

L2
L3
E

L2
E

N
E

L2
L3
E

L-N

/ U

L-L

277 VLN / 480 VLL

Connect in this grid system,

the device only using a voltage

transformer!

Disclaimer

Further information can be found on our web-
site www.janitza.com at Support > Downloads.

© 2016 - Janitza electronics GmbH - Lahnau.
All rights reserved. Duplication, editing,
distribution and any form of exploitation, also
as excerpts, is prohibited.

Subject to technical amendments

• Make sure that your device agrees with the

installation manual.

• Read and understand fi rst product-related

documents.

• Keep product supporting documentation

throughout the life available and, where ap-
propriate, to pass on to subsequent users.

• Please inform yourself about device revisi-

ons and the associated adjustments to the
product-related documentation on
www.janitza.com.

Disposal

Please observe national regulations!
If disposing of individual parts, please dispose
of them in accordance with their nature and
existing country-specifi c regulations, for
example as:

•  Electrical scrap
•  Plastics
•  Metals

Or, task a certifi ed disposal business with the
scrapping.

Relevant laws, applied standards and
directives

The laws, standards and directives for the
device applied by Janitza electronic GmbH
can be found in the declaration of conformity
on our website.

General

Safety

Symbols used:

This symbol is used as an addition
to the safety instructions and
warns of an electrical hazard.

This symbol is used as an addition
to the safety instructions and
warns of a potential hazard.



This symbol with the word

NOTE!

describes:

• Procedures that do not entail

any danger of injury.

• Important information,

procedures or handling steps.

Safety instructions are highlighted with
a warning triangle and shown as follows,
depending on the degree of hazard:

DANGER!

Indicates an immediately
threatening hazard that leads to
serious or even fatal injuries.

WARNING!

Indicates a potentially hazardous
situation that could lead to
serious or even fatal injuries.

CAUTION!

Indicates a potentially hazardous
situation that could lead to minor
injuries or damage to property.

• Before establishing electrical connections

to the device, earth it at the ground wire
connection if there is one.

• Hazardous voltages may arise in all circuit

parts that are connected to the power supply.

• Even after disconnecting the supply voltage,

there may still be hazardous voltages
present in the device (capacitor storage).

• Do not operate equipment with current

transformer circuits when open.

• Do not exceed the limit values stipulated in

the user manual and on the rating plate - even
during testing or commissioning.

• Observe the safety and warning information in

the documents that belong to the devices!

Qualifi ed personnel

In order to avoid injuries to personnel and
property damage, only qualifi ed personnel with
electrical training are permitted to work on the
devices with knowledge

• of the national regulations for accident

prevention

• of safety standards
• of installation, commissioning and operation

of the device.

Proper use

The device is

• intended for installation in switch cabinets

and small installation distributors (please
observe step 3 “Assembly”).

• not intended for installation in vehicles!

The use of the device in mobile equipment
is considered to be non-standard
environmental conditions and is therefore
only permitted after separate agreement.

• not intended for installation in environments

with hazardous oils, acids, gases, vapours,
dusts, radiation, etc.

The prerequisites of faultless, safe operation
of this device are proper transport and proper
storage, set-up, installation, operation and
maintenance.



NOTE!
For further information on device functions, data and assembly, see the user manual.

CAUTION!

Damage to property due to
disregard of the connection
conditions or impermissible
overvoltage!

•

Voltage and frequency correspond to the
details on the ratings plate! Limit values
stipulated in the user manual have been
complied with!

•

In building installations, the supply
voltage must be protected with a UL/IEC
approved circuit breaker / a fuse!

•

The isolation device

must be installed near the device
and in a location that is easily
accessible for the user.

must be labelled to identify the
respective device.

•

Do not tap the supply voltage from the
voltage transformer.

•

Provide a fuse for the neutral conductor
if the neutral conductor terminal of the
source is not grounded.

Connection variant "Direct voltage measurement
in the three-phase, four-conductor system".

Voltage measurement

3-phase, 4-conductor

systems with rated voltages

(L-N/L-L)

max. 277 V/480 V

Networks

Measurement in TT and TN
networks

Rated surge voltage

4 kV

Protection of

voltage measurement

1 - 10 A Trip characteristic B,

(With IEC / UL approval)

Overvoltage category

300 V CAT III

Resolution

0.01 V

Crest factor

2 (related to 240 Vrms)

Sampling rate

5.4 kHz

Frequency range of

the fundamental oscillation -
resolution

45 Hz .. 65 Hz
0.001 Hz

Fourier analysis

1.-25. Harmonic (all odd)

Current measurement

Nominal current

5 A

Rated current

6 A

Crest factor

2 (related to 6 Arms)

Resolution

0.1 mA

Measuring range

0.005 ... 6 Arms

Overvoltage category

300 V CAT II

Rated surge voltage

2 kV

Power consumption

approx 0.2 VA (Ri=5 mΩ)

Overload for 1 sec.

60 A (sinusoidal)

Sampling rate

5.4 kHz

Supply voltage

The device gets the supply voltage from the measuring voltage!
Supply from single phase

115 - 277 V (+-10%), 50/60 Hz

Supply from three phases

80 - 277 V (+-10%), 50/60 Hz

Power consumption

max. 1.5 VA

General information

Net weight

200 g

Device dimensions

h = 98 mm,

w = 71.5 mm,

d = 46 mm

Transport and storage

The following information applies to devices which are trans-

ported or stored in the original packaging.
Free fall

1 m

Temperature

-20° C to +70° C)

Ambient coditions during operation

The device

• weatherproof and use stationary!

• fulfi lls the conditions in accordance with DIN IEC 60721-3-3

• has protection class II according to IEC 60536 (VDE 0106,

part 1) and does not require a protective earth connection.

Operating temperature range

-25° C .. +60° C

Relative humidity

5 to 95% (at +25° C)

without condensation

Operating altitude

0 .. 2000 m above sea level

Degree of pollution

Housing fl ammability class

UL94V-0

Installed position

any

Fixing/mounting

35 mm top hat rail (according to

IEC/EN 60999-1, DIN EN 50022)

Stress by impact

2 joules, IK07 according to

IEC / EN61010-1: 2010

Ventilation

no external ventilation required.

Protection against ingress

of solid foreign bodies and

water

IP20 according to EN60529

September 2000,

IEC60529:1989

Terminal connection capacity

Conductors to be connected.

Only one conductor can be connected per terminal!
Single core, multi-core,

fi ne-stranded

0.08 - 2.5 mm

, AWG 28 - 12

Tightening torque

max. 0.5 Nm

Stripping length

min. 8 mm

RS485 interface

Protocol, modbus RTU

Modbus RTU/Slave

Transfer rate

9.6 kbps, 19.2 kbps,

38.4 kbps, 57.6 kbps,

115.2 kbps,

automatic detection

Procedure in the event of faults

Possible fault

Cause

Remedy

No LED lights

External fusing for the power supply voltage has tripped. Replace fuse.
Device is defective.

Send device to the manufacturer for repair.

Measured current is too large

or too small.

Current transformer factor is incorrectly programmed. Read out current transformer ratio and program with

the software GridVis.

Measured current is too

small.

Overrange.

Install current transformer with a larger current

transformer ratio.

The peak current value at the measurement input has

been exceeded by harmonic components.

Measured voltage is too large

or too small.

Measurement in the wrong phase.

Check connection and correct if necessary. (GridVis).

Voltage transformer incorrectly programmed.

Read out voltage transformer ratio and program with

the software GridVis.

Measured voltage is too

small.

Overrange.

Install voltage transformers.

The peak voltage value at the measurement input has

been exceeded by harmonic components.

Active power is too large or

too small.

The programmed current transformer transformation

ratio is incorrect.

Read out current transformer ratio and program with

the software GridVis.

The current path is assigned to the wrong voltage path. Check connection and correct if necessary. (GridVis).
The programmed voltage transformer transformation

ratio is incorrect.

Read out voltage transformer ratio and program with

the software GridVis.

Active power imported

supply / supply is reversed.

At least one current transformer connection is mixed

up/reversed.

Check connection using the software GridVis and

correct, if necessary.

A current path is assigned to the wrong voltage path.

No connection with the device. RS485: Device address is incorrect or wrong protocol.

Adjust the device address / select protocol.

Despite the measures above

the device does not work.

Device is defective.

Send device and error description to verify the

manufacturer.

*...

CAUTION!

Material damage from overloaded measurement inputs!

Too high current and voltage values overload the measurement inputs.

Observe the limits stated on the nameplate and in the user manual!

UMG 103-CBM

RS485

Data GND

Strommessung

Current measurement

Mess- und Versorgungsspannung

Measuring and supply voltage

Verbraucher

Load

Measurement data recording

Memory (Flash)

4 MB

(1024 Sectors a 4kB)

Record storage

(all profi les activated)

16000 records

Battery (soldered)

Typical life expectancy

BR 1632, 3V

8 - 10 years

RS485 bus

A
B

Data GND

Fig. UMG 103-CBM

WARNING!

Danger of injury due
to high currents and high
electrical voltages!

Red LED

Green LED

Coding
switches
for setting the
device address

RS485
Interface

Connection of measurement
voltage and supply voltage

Power Analyser

UMG 103-CBM

Installation manual

• Installation
• Device settings

The device is a universal measurement
device for low voltage distribution systems,
which

• measures and calculates electrical variables

such as voltage, current, power, energy,
harmonics, etc. in building installations, on
distribution units, circuit breakers and busbar
trunking systems.

• transmits measurement results via interface.

The device will be installed in switch cabinets or
in small installation distributors per DIN 43880
on a 35 mm mounting rail per DIN EN 60715.

• The device fulfi ls the application conditions

of DIN IEC 60721-3-3 and is intended for
permanent installation in locations that are
protected from the weather.

• It can be installed in any mounting position.
• Forced ventilation is not required.

Deutsche V

ersion:

siehe V

derseite

User manual:

Janitza electronics GmbH
Vor dem Polstück 6
D-35633 Lahnau / Germany
Support tel. +49 6441 9642-22
Fax +49 6441 9642-30
e-mail: [email protected]
Website: http://www.janitza.com

www

.janitza.com

Brief description of device

Assembly

Fig. Device on
mounting rail per
DIN EN 60715.

Connecting the supply voltage

WARNING!

Danger of injury due to
electrical voltage!

Serious bodily injury or death can result from:

• Contact with bare or stripped live wires.
• Device inputs that are dangerous to touch.

Render the system free of voltage before
starting work! Check the system is free of
electrical energy!

Current measurement

The device

• is only approved for measuring current with

a current transformer.

• is intended for the connection of current

transformers with secondary currents of
../1 A and ../5 A.

• has the current transformer ratio set to 5/5 A

as standard.

• The current transformers must have a base

insulation according to IEC 61010-1: 2010
for the nominal voltage of the circuit.

WARNING!

Danger of injury due to
electrical voltage!

Serious bodily injury or death
can result from:

• Contact with bare or stripped live wires.
• Current measurement inputs on the device

and on the current transformer that are
dangerous to touch.



NOTE!

• Further information on current trans-

formers can be found in the user
manual.

• Current transformer ratios can be

confi gured via the software.

Consumer

Connection "Current measurement via current
transformers".

Three-phase, four-conductor

system

Single-phase, three-conductor

system

Voltage measurement in the

three-phase, four-conductor system

Voltage measurement in the

single-phase, three-conductor system

Connection variants for voltage measurement



NOTE!
Voltage transformer ratios can be
confi gured via the software.

Technical data

1 2

4
67

1 2

4
67

x10

(10-90)

(1-9)

The green LED illuminates. Measurement
and supply voltages lie within the operating
voltage range. The device is operational.
The LED fl ashes for 0.5 sec. every 5 secs.

Both LEDs light up. The device is ready
for operation. At least one measurement
voltage or the supply voltage is below the
operating voltage range.

The green LED fl ashes.
Data transfer (RS485) is active.

The LEDs fl ash at the same time.
The data transfer (RS485) is faulty.

The red LED illuminates. Fault in the device!
Have the device checked by the manufacturer!

The red LED fl ashes. At least one current
measurement input or voltage measurement
input exceeds the measurement range.

The LEDs fl ash alternately.
Firmware checksum fault! Operation is
interrupted! Carry out a fi rmware update!

Connections and control elements

Current measurement connection

Coding switches
You can confi gure the device address with the
coding switches as follows:

Confi gure the device addresses in
the range of 01 to 99 with the coding
switches.
The device address 00 is reserved for
service purposes (further information
in the user manual).

LEDs

L1 L2 L3 N

Voltage measurement

The device derives its supply voltage from the
measured voltage.

CAUTION!

Danger of injury or damage
to the device

Disregard of the connection conditions for
the voltage measurement inputs can result in
injuries or to the device being damaged.
For this reason, note that:

•

The voltage measurement inputs

are not connected to DC voltage.

are equipped with a suitable, labelled
fuse located in the vicinity and
isolation device (alternative: circuit
breaker) located nearby.

are dangerous to touch.

•

Voltages that exceed the allowed rated
network voltages must be connected via
a voltage transformer.

•

Measured voltages and measured currents
must derive from the same network.

Disconnectors

Fuse (UL/IEC listed)

Load

• The device measures voltages L-N up to 277 V

and L-L up to 480 V.

• The measurement and surge voltages meet

overvoltage category 300 V CATIII.



NOTE!

• A circuit breaker can be used as an al-

ternative to a fuse and isolating device.

• If the range is exceeded, the red LED

fl ashes (see step „connections and
controls“).

Typical connection variants

The following schematic shows a typical connection variant for the device with:

•  Supply voltage and voltage measurement.
•  Current measurement.
•  RS485 interface with Modbus RTU protocol.

Connection
variant in the
"Three-phase,
four-conductor system".



NOTE!
Further technical data can be found in
the user manual for the device.

(gedrehtes Patchkabel)

RS485

PC/

GridVis®

RS485

RS232 RS232

Fig. UMG 103-CBM



NOTE!
Install the “GridVis®” software on the PC
to be used!

(gedrehtes Patchkabel)

USB

RS485

RS485

USB

PC/

GridVis®

(gedrehtes Patchkabel)

Connection of the device
via an UMG 604 as gateway.

UMG 604

RS485

Ethernet

RS485

PC/

GridVis®

Establish connection to PC

The 3 most common connections for communication
between PC and device are described in the following:

Device connection via interface
converter.

UMG 103-CBM

The PC connection of the device via the RS485
serial interface with, for example, an UMG 604
as gateway (see step “Established connection to
PC”) is a method

• for confi guring the device(s)
• and reading out data.

e.g. connection to the
UMG 604 as gateway
(Master)

Example: PC connection via RS485 interface and UMG 604 as gateway

e.g. connection
to further
Slave devices

RS485 bus structure

• In an RS485 bus structure (line), you connect

all devices in accordance with the Master-Slave
principle.

• One segment of an RS485 bus structure can

include up to 32 subscribers/devices.

• Terminate the cable at the start and end of a

segment with termination resistors (120 Ω, 0.25 W).
The device has no termination resistor.

• With more than 32 subscribers, repeaters must

be used to connect segments.

Correct

Incorrect

Terminal strip (switch cabinet).

Device with RS485 interface
(without termination resistor).

Device with RS485 interface
(termination resistor on the
device).



NOTE!
The coding switches can be used in the
RS485 bus structure to allocate the Slave
devices (UMG 103-CBM)

• different device addresses.
• different device addresses to the Master

device (UMG 604).

The UMG 103-CBM detects the transmission
speed (Baud rate) automatically!

Three-phase, four-conductor

system

Single-phase, three-conductor

system

Current measurement via current

transformer in three-phase,

four-conductor system

Current measurement in the

single-phase, three-conductor

system

Three-phase,

four-conductor system

Current measurement via

2 current transformers in three-

phase, four-conductor system

Connection variants for current measurement



NOTE!
If the range is exceeded, the red LED
fl ashes. (see Step „connections and
control elements“)

Dok Nr

. 2.057.002.0.d

Art. Nr

. 33.03.345

Mains systems

Suitable mains systems and max. rated voltages (DIN EN 61010-1/A1):

The device can be used in

• TN and TT networks
• in residential and industrial applications.

Three-phase, four-conductor systems

with earthed neutral conductor

Three-phase, four-conductor systems

with non-earthed neutral conductor

L1
L2

L3
E

L1
L2

L3
E

L2
L3
E

L2
E

N
E

L2
L3
E

L1
L2

L3
E

L1
L2

L3
E

L2
L3
E

L2
E

N
E

L2
L3
E

L-N

/ U

L-L

277 VLN / 480 VLL

Connect in this grid system,

the device only using a voltage

transformer!

Disclaimer

Further information can be found on our web-
site www.janitza.com at Support > Downloads.

© 2016 - Janitza electronics GmbH - Lahnau.
All rights reserved. Duplication, editing,
distribution and any form of exploitation, also
as excerpts, is prohibited.

Subject to technical amendments

• Make sure that your device agrees with the

installation manual.

• Read and understand fi rst product-related

documents.

• Keep product supporting documentation

throughout the life available and, where ap-
propriate, to pass on to subsequent users.

• Please inform yourself about device revisi-

ons and the associated adjustments to the
product-related documentation on
www.janitza.com.

Disposal

Please observe national regulations!
If disposing of individual parts, please dispose
of them in accordance with their nature and
existing country-specifi c regulations, for
example as:

•  Electrical scrap
•  Plastics
•  Metals

Or, task a certifi ed disposal business with the
scrapping.

Relevant laws, applied standards and
directives

The laws, standards and directives for the
device applied by Janitza electronic GmbH
can be found in the declaration of conformity
on our website.

General

Safety

Symbols used:

This symbol is used as an addition
to the safety instructions and
warns of an electrical hazard.

This symbol is used as an addition
to the safety instructions and
warns of a potential hazard.



This symbol with the word

NOTE!

describes:

• Procedures that do not entail

any danger of injury.

• Important information,

procedures or handling steps.

Safety instructions are highlighted with
a warning triangle and shown as follows,
depending on the degree of hazard:

DANGER!

Indicates an immediately
threatening hazard that leads to
serious or even fatal injuries.

WARNING!

Indicates a potentially hazardous
situation that could lead to
serious or even fatal injuries.

CAUTION!

Indicates a potentially hazardous
situation that could lead to minor
injuries or damage to property.

• Before establishing electrical connections

to the device, earth it at the ground wire
connection if there is one.

• Hazardous voltages may arise in all circuit

parts that are connected to the power supply.

• Even after disconnecting the supply voltage,

there may still be hazardous voltages
present in the device (capacitor storage).

• Do not operate equipment with current

transformer circuits when open.

• Do not exceed the limit values stipulated in

the user manual and on the rating plate - even
during testing or commissioning.

• Observe the safety and warning information in

the documents that belong to the devices!

Qualifi ed personnel

In order to avoid injuries to personnel and
property damage, only qualifi ed personnel with
electrical training are permitted to work on the
devices with knowledge

• of the national regulations for accident

prevention

• of safety standards
• of installation, commissioning and operation

of the device.

Proper use

The device is

• intended for installation in switch cabinets

and small installation distributors (please
observe step 3 “Assembly”).

• not intended for installation in vehicles!

The use of the device in mobile equipment
is considered to be non-standard
environmental conditions and is therefore
only permitted after separate agreement.

• not intended for installation in environments

with hazardous oils, acids, gases, vapours,
dusts, radiation, etc.

The prerequisites of faultless, safe operation
of this device are proper transport and proper
storage, set-up, installation, operation and
maintenance.



NOTE!
For further information on device functions, data and assembly, see the user manual.

CAUTION!

Damage to property due to
disregard of the connection
conditions or impermissible
overvoltage!

•

Voltage and frequency correspond to the
details on the ratings plate! Limit values
stipulated in the user manual have been
complied with!

•

In building installations, the supply
voltage must be protected with a UL/IEC
approved circuit breaker / a fuse!

•

The isolation device

must be installed near the device
and in a location that is easily
accessible for the user.

must be labelled to identify the
respective device.

•

Do not tap the supply voltage from the
voltage transformer.

•

Provide a fuse for the neutral conductor
if the neutral conductor terminal of the
source is not grounded.

Connection variant "Direct voltage measurement
in the three-phase, four-conductor system".

Voltage measurement

3-phase, 4-conductor

systems with rated voltages

(L-N/L-L)

max. 277 V/480 V

Networks

Measurement in TT and TN
networks

Rated surge voltage

4 kV

Protection of

voltage measurement

1 - 10 A Trip characteristic B,

(With IEC / UL approval)

Overvoltage category

300 V CAT III

Resolution

0.01 V

Crest factor

2 (related to 240 Vrms)

Sampling rate

5.4 kHz

Frequency range of

the fundamental oscillation -
resolution

45 Hz .. 65 Hz
0.001 Hz

Fourier analysis

1.-25. Harmonic (all odd)

Current measurement

Nominal current

5 A

Rated current

6 A

Crest factor

2 (related to 6 Arms)

Resolution

0.1 mA

Measuring range

0.005 ... 6 Arms

Overvoltage category

300 V CAT II

Rated surge voltage

2 kV

Power consumption

approx 0.2 VA (Ri=5 mΩ)

Overload for 1 sec.

60 A (sinusoidal)

Sampling rate

5.4 kHz

Supply voltage

The device gets the supply voltage from the measuring voltage!
Supply from single phase

115 - 277 V (+-10%), 50/60 Hz

Supply from three phases

80 - 277 V (+-10%), 50/60 Hz

Power consumption

max. 1.5 VA

General information

Net weight

200 g

Device dimensions

h = 98 mm,

w = 71.5 mm,

d = 46 mm

Transport and storage

The following information applies to devices which are trans-

ported or stored in the original packaging.
Free fall

1 m

Temperature

-20° C to +70° C)

Ambient coditions during operation

The device

• weatherproof and use stationary!

• fulfi lls the conditions in accordance with DIN IEC 60721-3-3

• has protection class II according to IEC 60536 (VDE 0106,

part 1) and does not require a protective earth connection.

Operating temperature range

-25° C .. +60° C

Relative humidity

5 to 95% (at +25° C)

without condensation

Operating altitude

0 .. 2000 m above sea level

Degree of pollution

Housing fl ammability class

UL94V-0

Installed position

any

Fixing/mounting

35 mm top hat rail (according to

IEC/EN 60999-1, DIN EN 50022)

Stress by impact

2 joules, IK07 according to

IEC / EN61010-1: 2010

Ventilation

no external ventilation required.

Protection against ingress

of solid foreign bodies and

water

IP20 according to EN60529

September 2000,

IEC60529:1989

Terminal connection capacity

Conductors to be connected.

Only one conductor can be connected per terminal!
Single core, multi-core,

fi ne-stranded

0.08 - 2.5 mm

, AWG 28 - 12

Tightening torque

max. 0.5 Nm

Stripping length

min. 8 mm

RS485 interface

Protocol, modbus RTU

Modbus RTU/Slave

Transfer rate

9.6 kbps, 19.2 kbps,

38.4 kbps, 57.6 kbps,

115.2 kbps,

automatic detection

Procedure in the event of faults

Possible fault

Cause

Remedy

No LED lights

External fusing for the power supply voltage has tripped. Replace fuse.
Device is defective.

Send device to the manufacturer for repair.

Measured current is too large

or too small.

Current transformer factor is incorrectly programmed. Read out current transformer ratio and program with

the software GridVis.

Measured current is too

small.

Overrange.

Install current transformer with a larger current

transformer ratio.

The peak current value at the measurement input has

been exceeded by harmonic components.

Measured voltage is too large

or too small.

Measurement in the wrong phase.

Check connection and correct if necessary. (GridVis).

Voltage transformer incorrectly programmed.

Read out voltage transformer ratio and program with

the software GridVis.

Measured voltage is too

small.

Overrange.

Install voltage transformers.

The peak voltage value at the measurement input has

been exceeded by harmonic components.

Active power is too large or

too small.

The programmed current transformer transformation

ratio is incorrect.

Read out current transformer ratio and program with

the software GridVis.

The current path is assigned to the wrong voltage path. Check connection and correct if necessary. (GridVis).
The programmed voltage transformer transformation

ratio is incorrect.

Read out voltage transformer ratio and program with

the software GridVis.

Active power imported

supply / supply is reversed.

At least one current transformer connection is mixed

up/reversed.

Check connection using the software GridVis and

correct, if necessary.

A current path is assigned to the wrong voltage path.

No connection with the device. RS485: Device address is incorrect or wrong protocol.

Adjust the device address / select protocol.

Despite the measures above

the device does not work.

Device is defective.

Send device and error description to verify the

manufacturer.

*...

CAUTION!

Material damage from overloaded measurement inputs!

Too high current and voltage values overload the measurement inputs.

Observe the limits stated on the nameplate and in the user manual!

UMG 103-CBM

RS485

Data GND

Strommessung

Current measurement

Mess- und Versorgungsspannung

Measuring and supply voltage

Verbraucher

Load

Measurement data recording

Memory (Flash)

4 MB

(1024 Sectors a 4kB)

Record storage

(all profi les activated)

16000 records

Battery (soldered)

Typical life expectancy

BR 1632, 3V

8 - 10 years

RS485 bus

A
B

Data GND

Fig. UMG 103-CBM

WARNING!

Danger of injury due
to high currents and high
electrical voltages!

Red LED

Green LED

Coding
switches
for setting the
device address

RS485
Interface

Connection of measurement
voltage and supply voltage

Power Analyser

UMG 103-CBM

Installation manual

• Installation
• Device settings

The device is a universal measurement
device for low voltage distribution systems,
which

• measures and calculates electrical variables

such as voltage, current, power, energy,
harmonics, etc. in building installations, on
distribution units, circuit breakers and busbar
trunking systems.

• transmits measurement results via interface.

The device will be installed in switch cabinets or
in small installation distributors per DIN 43880
on a 35 mm mounting rail per DIN EN 60715.

• The device fulfi ls the application conditions

of DIN IEC 60721-3-3 and is intended for
permanent installation in locations that are
protected from the weather.

• It can be installed in any mounting position.
• Forced ventilation is not required.

Deutsche V

ersion:

siehe V

derseite

User manual:

Janitza electronics GmbH
Vor dem Polstück 6
D-35633 Lahnau / Germany
Support tel. +49 6441 9642-22
Fax +49 6441 9642-30
e-mail: [email protected]
Website: http://www.janitza.com

www

.janitza.com

Brief description of device

Assembly

Fig. Device on
mounting rail per
DIN EN 60715.

Connecting the supply voltage

WARNING!

Danger of injury due to
electrical voltage!

Serious bodily injury or death can result from:

• Contact with bare or stripped live wires.
• Device inputs that are dangerous to touch.

Render the system free of voltage before
starting work! Check the system is free of
electrical energy!

Current measurement

The device

• is only approved for measuring current with

a current transformer.

• is intended for the connection of current

transformers with secondary currents of
../1 A and ../5 A.

• has the current transformer ratio set to 5/5 A

as standard.

• The current transformers must have a base

insulation according to IEC 61010-1: 2010
for the nominal voltage of the circuit.

WARNING!

Danger of injury due to
electrical voltage!

Serious bodily injury or death
can result from:

• Contact with bare or stripped live wires.
• Current measurement inputs on the device

and on the current transformer that are
dangerous to touch.



NOTE!

• Further information on current trans-

formers can be found in the user
manual.

• Current transformer ratios can be

confi gured via the software.

Consumer

Connection "Current measurement via current
transformers".

Three-phase, four-conductor

system

Single-phase, three-conductor

system

Voltage measurement in the

three-phase, four-conductor system

Voltage measurement in the

single-phase, three-conductor system

Connection variants for voltage measurement



NOTE!
Voltage transformer ratios can be
confi gured via the software.

Technical data

1 2

4
67

1 2

4
67

x10

(10-90)

(1-9)

The green LED illuminates. Measurement
and supply voltages lie within the operating
voltage range. The device is operational.
The LED fl ashes for 0.5 sec. every 5 secs.

Both LEDs light up. The device is ready
for operation. At least one measurement
voltage or the supply voltage is below the
operating voltage range.

The green LED fl ashes.
Data transfer (RS485) is active.

The LEDs fl ash at the same time.
The data transfer (RS485) is faulty.

The red LED illuminates. Fault in the device!
Have the device checked by the manufacturer!

The red LED fl ashes. At least one current
measurement input or voltage measurement
input exceeds the measurement range.

The LEDs fl ash alternately.
Firmware checksum fault! Operation is
interrupted! Carry out a fi rmware update!

Connections and control elements

Current measurement connection

Coding switches
You can confi gure the device address with the
coding switches as follows:

Confi gure the device addresses in
the range of 01 to 99 with the coding
switches.
The device address 00 is reserved for
service purposes (further information
in the user manual).

LEDs

L1 L2 L3 N

Voltage measurement

The device derives its supply voltage from the
measured voltage.

CAUTION!

Danger of injury or damage
to the device

Disregard of the connection conditions for
the voltage measurement inputs can result in
injuries or to the device being damaged.
For this reason, note that:

•

The voltage measurement inputs

are not connected to DC voltage.

are equipped with a suitable, labelled
fuse located in the vicinity and
isolation device (alternative: circuit
breaker) located nearby.

are dangerous to touch.

•

Voltages that exceed the allowed rated
network voltages must be connected via
a voltage transformer.

•

Measured voltages and measured currents
must derive from the same network.

Disconnectors

Fuse (UL/IEC listed)

Load

• The device measures voltages L-N up to 277 V

and L-L up to 480 V.

• The measurement and surge voltages meet

overvoltage category 300 V CATIII.



NOTE!

• A circuit breaker can be used as an al-

ternative to a fuse and isolating device.

• If the range is exceeded, the red LED

fl ashes (see step „connections and
controls“).

Typical connection variants

The following schematic shows a typical connection variant for the device with:

•  Supply voltage and voltage measurement.
•  Current measurement.
•  RS485 interface with Modbus RTU protocol.

Connection
variant in the
"Three-phase,
four-conductor system".



NOTE!
Further technical data can be found in
the user manual for the device.

(gedrehtes Patchkabel)

RS485

PC/

GridVis®

RS485

RS232 RS232

Fig. UMG 103-CBM



NOTE!
Install the “GridVis®” software on the PC
to be used!

(gedrehtes Patchkabel)

USB

RS485

RS485

USB

PC/

GridVis®

(gedrehtes Patchkabel)

Connection of the device
via an UMG 604 as gateway.

UMG 604

RS485

Ethernet

RS485

PC/

GridVis®

Establish connection to PC

The 3 most common connections for communication
between PC and device are described in the following:

Device connection via interface
converter.

UMG 103-CBM

The PC connection of the device via the RS485
serial interface with, for example, an UMG 604
as gateway (see step “Established connection to
PC”) is a method

• for confi guring the device(s)
• and reading out data.

e.g. connection to the
UMG 604 as gateway
(Master)

Example: PC connection via RS485 interface and UMG 604 as gateway

e.g. connection
to further
Slave devices

RS485 bus structure

• In an RS485 bus structure (line), you connect

all devices in accordance with the Master-Slave
principle.

• One segment of an RS485 bus structure can

include up to 32 subscribers/devices.

• Terminate the cable at the start and end of a

segment with termination resistors (120 Ω, 0.25 W).
The device has no termination resistor.

• With more than 32 subscribers, repeaters must

be used to connect segments.

Correct

Incorrect

Terminal strip (switch cabinet).

Device with RS485 interface
(without termination resistor).

Device with RS485 interface
(termination resistor on the
device).



NOTE!
The coding switches can be used in the
RS485 bus structure to allocate the Slave
devices (UMG 103-CBM)

• different device addresses.
• different device addresses to the Master

device (UMG 604).

The UMG 103-CBM detects the transmission
speed (Baud rate) automatically!

Three-phase, four-conductor

system

Single-phase, three-conductor

system

Current measurement via current

transformer in three-phase,

four-conductor system

Current measurement in the

single-phase, three-conductor

system

Three-phase,

four-conductor system

Current measurement via

2 current transformers in three-

phase, four-conductor system

Connection variants for current measurement



NOTE!
If the range is exceeded, the red LED
fl ashes. (see Step „connections and
control elements“)

Dok Nr

. 2.057.002.0.d

Art. Nr

. 33.03.345

Mains systems

Suitable mains systems and max. rated voltages (DIN EN 61010-1/A1):

The device can be used in

• TN and TT networks
• in residential and industrial applications.

Three-phase, four-conductor systems

with earthed neutral conductor

Three-phase, four-conductor systems

with non-earthed neutral conductor

L1
L2

L3
E

L1
L2

L3
E

L2
L3
E

L2
E

N
E

L2
L3
E

L1
L2

L3
E

L1
L2

L3
E

L2
L3
E

L2
E

N
E

L2
L3
E

L-N

/ U

L-L

277 VLN / 480 VLL

Connect in this grid system,

the device only using a voltage

transformer!

Disclaimer

Further information can be found on our web-
site www.janitza.com at Support > Downloads.

Subject to technical amendments

• Make sure that your device agrees with the

installation manual.

• Read and understand fi rst product-related

documents.

• Keep product supporting documentation

throughout the life available and, where ap-
propriate, to pass on to subsequent users.

• Please inform yourself about device revisi-

ons and the associated adjustments to the
product-related documentation on
www.janitza.com.

Disposal

Please observe national regulations!
If disposing of individual parts, please dispose
of them in accordance with their nature and
existing country-specifi c regulations, for
example as:

•  Electrical scrap
•  Plastics
•  Metals

Or, task a certifi ed disposal business with the
scrapping.

Relevant laws, applied standards and
directives

The laws, standards and directives for the
device applied by Janitza electronic GmbH
can be found in the declaration of conformity
on our website.

General

Safety

Symbols used:

This symbol is used as an addition
to the safety instructions and
warns of an electrical hazard.

This symbol is used as an addition
to the safety instructions and
warns of a potential hazard.



This symbol with the word

NOTE!

describes:

• Procedures that do not entail

any danger of injury.

• Important information,

procedures or handling steps.

Safety instructions are highlighted with
a warning triangle and shown as follows,
depending on the degree of hazard:

DANGER!

Indicates an immediately
threatening hazard that leads to
serious or even fatal injuries.

WARNING!

Indicates a potentially hazardous
situation that could lead to
serious or even fatal injuries.

CAUTION!

Indicates a potentially hazardous
situation that could lead to minor
injuries or damage to property.

• Before establishing electrical connections

to the device, earth it at the ground wire
connection if there is one.

• Hazardous voltages may arise in all circuit

parts that are connected to the power supply.

• Even after disconnecting the supply voltage,

there may still be hazardous voltages
present in the device (capacitor storage).

• Do not operate equipment with current

transformer circuits when open.

• Do not exceed the limit values stipulated in

the user manual and on the rating plate - even
during testing or commissioning.

• Observe the safety and warning information in

the documents that belong to the devices!

Qualifi ed personnel

In order to avoid injuries to personnel and
property damage, only qualifi ed personnel with
electrical training are permitted to work on the
devices with knowledge

• of the national regulations for accident

prevention

• of safety standards
• of installation, commissioning and operation

of the device.

Proper use

The device is

• intended for installation in switch cabinets

and small installation distributors (please
observe step 3 “Assembly”).

• not intended for installation in vehicles!

The use of the device in mobile equipment
is considered to be non-standard
environmental conditions and is therefore
only permitted after separate agreement.

• not intended for installation in environments

with hazardous oils, acids, gases, vapours,
dusts, radiation, etc.

The prerequisites of faultless, safe operation
of this device are proper transport and proper
storage, set-up, installation, operation and
maintenance.



NOTE!
For further information on device functions, data and assembly, see the user manual.

CAUTION!

Damage to property due to
disregard of the connection
conditions or impermissible
overvoltage!

•

Voltage and frequency correspond to the
details on the ratings plate! Limit values
stipulated in the user manual have been
complied with!

•

In building installations, the supply
voltage must be protected with a UL/IEC
approved circuit breaker / a fuse!

•

The isolation device

must be installed near the device
and in a location that is easily
accessible for the user.

must be labelled to identify the
respective device.

•

Do not tap the supply voltage from the
voltage transformer.

•

Provide a fuse for the neutral conductor
if the neutral conductor terminal of the
source is not grounded.

Connection variant "Direct voltage measurement
in the three-phase, four-conductor system".

Voltage measurement

3-phase, 4-conductor

systems with rated voltages

(L-N/L-L)

max. 277 V/480 V

Networks

Measurement in TT and TN
networks

Rated surge voltage

4 kV

Protection of

voltage measurement

1 - 10 A Trip characteristic B,

(With IEC / UL approval)

Overvoltage category

300 V CAT III

Resolution

0.01 V

Crest factor

2 (related to 240 Vrms)

Sampling rate

5.4 kHz

Frequency range of

the fundamental oscillation -
resolution

45 Hz .. 65 Hz
0.001 Hz

Fourier analysis

1.-25. Harmonic (all odd)

Current measurement

Nominal current

5 A

Rated current

6 A

Crest factor

2 (related to 6 Arms)

Resolution

0.1 mA

Measuring range

0.005 ... 6 Arms

Overvoltage category

300 V CAT II

Rated surge voltage

2 kV

Power consumption

approx 0.2 VA (Ri=5 mΩ)

Overload for 1 sec.

60 A (sinusoidal)

Sampling rate

5.4 kHz

Supply voltage

The device gets the supply voltage from the measuring voltage!
Supply from single phase

115 - 277 V (+-10%), 50/60 Hz

Supply from three phases

80 - 277 V (+-10%), 50/60 Hz

Power consumption

max. 1.5 VA

General information

Net weight

200 g

Device dimensions

h = 98 mm,

w = 71.5 mm,

d = 46 mm

Transport and storage

The following information applies to devices which are trans-

ported or stored in the original packaging.
Free fall

1 m

Temperature

-20° C to +70° C)

Ambient coditions during operation

The device

• weatherproof and use stationary!

• fulfi lls the conditions in accordance with DIN IEC 60721-3-3

• has protection class II according to IEC 60536 (VDE 0106,

part 1) and does not require a protective earth connection.

Operating temperature range

-25° C .. +60° C

Relative humidity

5 to 95% (at +25° C)

without condensation

Operating altitude

0 .. 2000 m above sea level

Degree of pollution

Housing fl ammability class

UL94V-0

Installed position

any

Fixing/mounting

35 mm top hat rail (according to

IEC/EN 60999-1, DIN EN 50022)

Stress by impact

2 joules, IK07 according to

IEC / EN61010-1: 2010

Ventilation

no external ventilation required.

Protection against ingress

of solid foreign bodies and

water

IP20 according to EN60529

September 2000,

IEC60529:1989

Terminal connection capacity

Conductors to be connected.

Only one conductor can be connected per terminal!
Single core, multi-core,

fi ne-stranded

0.08 - 2.5 mm

, AWG 28 - 12

Tightening torque

max. 0.5 Nm

Stripping length

min. 8 mm

RS485 interface

Protocol, modbus RTU

Modbus RTU/Slave

Transfer rate

9.6 kbps, 19.2 kbps,

38.4 kbps, 57.6 kbps,

115.2 kbps,

automatic detection

Procedure in the event of faults

Possible fault

Cause

Remedy

No LED lights

External fusing for the power supply voltage has tripped. Replace fuse.
Device is defective.

Send device to the manufacturer for repair.

Measured current is too large

or too small.

Current transformer factor is incorrectly programmed. Read out current transformer ratio and program with

the software GridVis.

Measured current is too

small.

Overrange.

Install current transformer with a larger current

transformer ratio.

The peak current value at the measurement input has

been exceeded by harmonic components.

Measured voltage is too large

or too small.

Measurement in the wrong phase.

Check connection and correct if necessary. (GridVis).

Voltage transformer incorrectly programmed.

Read out voltage transformer ratio and program with

the software GridVis.

Measured voltage is too

small.

Overrange.

Install voltage transformers.

The peak voltage value at the measurement input has

been exceeded by harmonic components.

Active power is too large or

too small.

The programmed current transformer transformation

ratio is incorrect.

Read out current transformer ratio and program with

the software GridVis.

The current path is assigned to the wrong voltage path. Check connection and correct if necessary. (GridVis).
The programmed voltage transformer transformation

ratio is incorrect.

Read out voltage transformer ratio and program with

the software GridVis.

Active power imported

supply / supply is reversed.

At least one current transformer connection is mixed

up/reversed.

Check connection using the software GridVis and

correct, if necessary.

A current path is assigned to the wrong voltage path.

No connection with the device. RS485: Device address is incorrect or wrong protocol.

Adjust the device address / select protocol.

Despite the measures above

the device does not work.

Device is defective.

Send device and error description to verify the

manufacturer.

*...

CAUTION!

Material damage from overloaded measurement inputs!

Too high current and voltage values overload the measurement inputs.

Observe the limits stated on the nameplate and in the user manual!

UMG 103-CBM

RS485

Data GND

Strommessung

Current measurement

Mess- und Versorgungsspannung

Measuring and supply voltage

Verbraucher

Load

Measurement data recording

Memory (Flash)

4 MB

(1024 Sectors a 4kB)

Record storage

(all profi les activated)

16000 records

Battery (soldered)

Typical life expectancy

BR 1632, 3V

8 - 10 years

RS485 bus

A
B

Data GND

Fig. UMG 103-CBM

WARNING!

Danger of injury due
to high currents and high
electrical voltages!

Red LED

Green LED

Coding
switches
for setting the
device address

RS485
Interface

Connection of measurement
voltage and supply voltage

Power Analyser

UMG 103-CBM

Installation manual

• Installation
• Device settings

Содержание UMG 103-CBM

Страница 1: ...Die Trennvorrichtung für den Nutzer leicht erreichbar und in der Nähe des Geräts anbringen für das jeweilige Gerät kennzeichnen Die Versorgungsspannung nicht an den Spannungswandlern abgreifen Für den Neutralleiter eine Sicherung vor sehen wenn der Neutralleiteranschluss der Quelle nicht geerdet ist B A C Power Analyser UMG 103 CBM Installationsanleitung Installation Geräte Einstellungen 2 3 7 6 S...

Страница 2: ...Allgemeines Haftungsausschluss Die Beachtung der Informationsprodukte zu den Geräten ist Voraussetzung für den sicheren Betrieb und um angegebene Leistungsmerk male und Produkteigenschaften zu erreichen Für Personen Sach oder Vermögensschä den die durch Nichtachtung der Informations produkte entstehen übernimmt die Janitza electronics GmbH keine Haftung Sorgen Sie dafür dass Ihre Informations prod...

Страница 3: ...ng BR 1632 3V 8 10 Jahre B A C UMG 103 CBM Installationsanleitung Installation Geräte Einstellungen www janitza de Dok Nr 2 057 002 0 d r s i o n a r s i d e 10 14 5 Versorgungsspannung anlegen 4 c WARNUNG Verletzungsgefahr durch elektrische Spannung Schwere Körperverletzungen oder Tod können erfolgen durch Berühren von blanken oder abisolierten Adern die unter Spannung stehen Berührungsgefährlich...

Страница 4: ...e Spannungsspitzen können schwere Körperverletzungen oder Tod zur Folge haben Den offenen Betrieb der Stromwandler ver meiden unbelastete Wandler kurzschließen Verbraucher L2 L3 L1 S2 S1 S2 S1 S2 S1 B A C B A C Leuchtdiode rot Leuchtdiode grün Kodierschalter Einstellung der Geräteadresse RS485 Schnittstelle Anschluss Mess und Versorgungsspannunng 14 c WARNUNG Verletzungsgefahr durch elektrische Sp...

Страница 5: ...halter Einstellung der Geräteadresse RS485 Schnittstelle Anschluss Mess und Versorgungsspannunng 13 12 Anschlüsse und Bedienelemente Anschluss Strommessung Kodierschalter Mit den Kodierschaltern konfigurieren Sie die Geräteadresse wie folgt 0 1 2 4 6 7 5 3 8 9 0 1 2 4 6 7 5 3 8 9 x10 10 90 x1 1 9 Mit den Kodierschaltern konfigurieren Sie Geräteadressen im Bereich von 01 bis 99 Die Geräteadresse 00...

Страница 6: ...ble for the user must be labelled to identify the respective device Do not tap the supply voltage from the voltage transformer Provide a fuse for the neutral conductor if the neutral conductor terminal of the source is not grounded UMG 103 CBM RS485 2 3 A B 1 Data GND Strommessung Current measurement Mess und Versorgungsspannung Measuring and supply voltage Verbraucher Load A B C B A C Power Analy...

Страница 7: ...d system the device only using a voltage transformer Disclaimer The observance of the information products for the devices is a prerequisite for safe operation and to achieve the stipulated performance characteristics and product characteristics Janitza electronics GmbH accepts no liability for injuries to personnel property damage or financial losses arising due to a failure to comply with the in...

Страница 8: ...ancy BR 1632 3V 8 10 years B A C UMG 103 CBM Installation manual Installation Device settings 5 4 V e r s i o n o r d e r s e i t e User manual Janitza electronics GmbH Vor dem Polstück 6 D 35633 Lahnau Germany Support tel 49 6441 9642 22 Fax 49 6441 9642 30 e mail info janitza com Website http www janitza com www janitza com Connecting the supply voltage c WARNING Danger of injury due to electric...

Страница 9: ...rating with an open secondary circuit high voltage peaks can result in serious or even fatal injuries Avoid open operation of the current transformers short circuit unloaded transformers B A C Red LED Green LED Coding switches for setting the device address RS485 Interface Connection of measurement voltage and supply voltage c WARNING Danger of injury due to electrical voltage Serious bodily injur...

Страница 10: ... device address RS485 Interface Connection of measurement voltage and supply voltage The device is only approved for measuring current with a current transformer is intended for the connection of current transformers with secondary currents of 1 A and 5 A has the current transformer ratio set to 5 5 A as standard The current transformers must have a base insulation according to IEC 61010 1 2010 fo...

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