12
RCM 202-AB
7.3
Application example analog outputs and UMG 96RM-E
Fig. 7b:
Connection to the analogue outputs of a UMG 96RM-E
The analogue outputs (AO1/AO2) may only be operated on galvanically isolated
inputs/devices. Use a maximum of
ONE
analogue measurement circuit per meas-
urement device (e.g. UMG 96RM-E) for the RCM 202-AB. Using TWO analogue
channels between the RCM 202-AB and a device without galvanically isolated in-
puts leads to measurement errors (cf. Fig. 10c)!
Fig. 8c:
Invalid connection scheme
Janitza power supply unit (art. no. 16.05.012) required!
RCM 202-AB
13
7.4
Application examples via Modbus (RS485 interface)
Fig. 9:
Application example – PLC
Fig. 10:
Application example – Measurement devices
Fig. 11:
Application example – Modbus TCP
Fig. 12:
Application example RS232/RS485
14
RCM 202-AB
8
Assembly, commissioning and configuration
ATTENTION
Assembly, connection and commissioning may only take place through
qualified electrical personnel in compliance with the existing safety regula-
tions and standards.
A line circuit breaker must be installed for the power supply of the
RCM 202-AB. After commissioning, the connectors of the device must be
protected against accidental contact by a cover if it is not ensured that only
qualified personnel have access to the device.
NOTE
Site information (e.g.: device designations), the installation in the Modbus
segment, the serial number, the Modbus address (device address) as well
as the designation of the current measurement transformer must be noted
in the system documentation or taken from the supplied system documen-
tation.
8.1
Assembly (initial installation)
The RCM 202-AB is installed in distribution boards and switchgears on a top hat rail
(35
mm) according to DIN EN 60715.
Requirements:
The current measurement transformers are already installed on
the cables to be monitored.
Visually check the RCM 202-AB for damage.
Snap the RCM 202-AB onto the top hat rail.
Check the RCM 202-AB for tight fit.
RCM 202-AB
15
Connect the plug of the RS485 interface to RCM 202-AB. Connect the ground
connection of the RS485 interface with the protective conductor PE.
NOTE
The device address 1 and the baud rate of 19200 baud are factory-set.
If the RCM 202-AB is the first or last device in the Modbus line, the termina-
tion resistor must be set.
The ground terminals of all RS485 connections of multiple RCM 202-AB
must be connected with the ground wire of the cable. The ground wire must
be grounded in one point. The second wire pair of the bus cable is used as
the ground wire. Both wires of the pair are parallel connected.
The shield may be applied only on one side!
Terminate the first and last bus participants within a bus segment by pushing
the “Term” switch to the right.
NOTE
In the case of a RS485 connection from a control cabinet to a control cabi-
net, the Modbus connections B+ and A- must be electrically isolated.
Connect the current measurement transformer to the plug of the respective
current measurement input (I1 and I2). When doing so, observe the connec-
tions K and L (see also Tab. 1 on page 10).
Connect the analog and digital outputs if necessary.
Make sure that the connected connectors are still firmly seated.
Retighten all screw connections.
8.2 Commissioning
NOTE
The housing of the RCM 202-AB warms up during operation.
Connect the plug for the power supply to the N/L connection. The status LED
flashes green. RCM 202-AB initialization takes place. “I1
=
---” and “I2
=
---”
appear on the display.
Wait until initialization is completed. Initialization can take up to 60 seconds.
Initialization will take longer if the transformer measures residual currents
already during initialization.
The status LED lights up green and the measured values for the activated
measurement channels are shown on the display. The RCM 202-AB is
ready for operation.
16
RCM 202-AB
If necessary, configure the RCM 202-AB (see chapter
Fehler! Verweisquelle
konnte nicht gefunden werden.
) according to the system to be monitored
and depending on the circuit of its connections.
Observe the user manual!
The system documentation must be observed for the parameterization of
the RCM 202-AB.
9
Technical data
9.1
General technical data
Operating data
Supply voltage U
S
AC 90
…
230
V, 50/60
Hz
Required external back-up fuse for the
power supply
Circuit breaker 1 pole, 3 A,
AC 230 V
Operating mode
Continuous operation
Power consumption (internal consumption)
8
W
Isolation coordination according to IEC 60664-1
Rated current lb
4 kA
Rated surge voltage
4 kV
Pollution degree
2
Rated voltage
AC 250 V, 50 … 60 Hz
Monitored system
Measurement transformer types/transformation ratio:
Residual current measuring transducer
See Tab. 3 on page 19
Current measurement transformer rated
voltage
AC 20 ... 720 V
Current measurement transformer rated fre-
quency
0 ... 20 kHz
Current measurement transformer rated
current
(depending on the type)
Measurement channels
Number of measuring channels
2 (connectable current measurement
transformers)
Measured value recording
Parallel, effective value measurement
(true RMS)
Evaluation
Residual currents
RCM 202-AB
17
Type A and B according to IEC 62020
Measurement response residual current I
Δ
n
Parameterizable, 30 mA ... 20
A
Response delay time of the
warning and alarm messages t
v
Parameterizable, 10
ms ... 10 s
Reset delay time t
vr
Parameterizable, 10
ms ... 10 s
Transformer connections
Connection to the current measurement
transformers
Line resistance max. 2
Ω
Line/transformer 2-wire
Line length:
Single wires (0.75 to 1.5 mm²)
max. 1 m
Twisted single wires (0.75 to 1.5 mm²)
max. 10 m
Shielded cable (0.75 to 1.5 mm²)
max. 10 m
Displays, messages and memory
Full graphics display (LCD)
128 x 64 pixel with backlight
Status LED
3-color
Controls
3 keys
Menu languages
German, English, Spanish
Date and time
With RTC, stored in the non-volatile
memory
Parameterization
On RCM 202-AB in the configuration
menu
Messages
Display, LED, Modbus, digital outputs
Measured value memory
18,725 datasets (circular buffer)
With date and time
Examples:
Shielded cable 0.75 mm
2
(shield on I)
Max. length 20 m (21.87 yd)
Cable type J-Y(ST)Y Ø 0.6 mm
Max. length 15 m (16.4 yd)
Analog outputs
Interface
4 … 20
mA
Quantity
2
Supply voltage of the analog outputs
DC 12 … 24
V
Digital outputs
Number of digital outputs
2
Switching voltage
max. DC 60
V, AC 30
V
Maximum current
350
mA
Start-up resistance
2
Ω
18
RCM 202-AB
Maximum cable length
up to 30 m (32.8 yd) unshielded,
above 30
m (32.8 yd) shielded
RS485 interface
Protocol
Modbus RTU (RCM 202-AB as the slave)
Interface
RS485
Baud rate
Parameterizable, 9.6 … 115.2
kbaud
Address range
1 … 247
max. cable length (38.4
kbaud)
1200
m (1212.3 yd)
Cable (shielded, shield one-sided on PE)
Unitronic Li2YCY(TP) 2x2x0.22 (Lapp ca-
ble)
Termination resistor
120
Ω
(can be activated on the device)
Device safety
Safety regulations for electrical measurement, control, regulation and laboratory devices
Part 1: General requirements
IEC/EN 61010-1
Part 2-030: Particular requirements for
equipment having testing or measuring cir-
cuits
IEC/EN 61010-2-030
Electromagnetic compatibility (EMC)
Immunity from interference
Class A: Industrial sector
IEC/EN 61326-1
Electrostatic discharges
IEC/EN 61000-4-2
Voltage dips
IEC/EN 61000-4-11
Emissions
Class B: Residential sector
IEC/EN 61326-1
RFI field strength 30 ... 1000 MHz
IEC/CISPR11/EN 55011
Radiated interference voltage 0.15 ... 30
MHz
IEC/CISPR11/EN 55011
Standards
The RCM 202-AB fulfills the requirements according to
EN
62020:1998+A1:2005
(VDE
0663):2005
Ambient conditions
Ambient temperature during operation
-5 ... +55°C (23°F…131°F)
Ambient temperature during storage
-25 ... +70°C (-13°F…158°F)
Ambient temperature during transport
-25 ... +70°C (-13°F…158°F)
Altitude
0 … 2000
m (0 …1.24 mi)
Climate category according to
IEC 60721-3-3 (operation)
3K5
RCM 202-AB
19
Installation conditions
Installation position
Horizontal/vertical
Assembly
Top hat rail per DIN EN 60715
Device dimensions in mm (H x W x D)
71
x
90
x
73
Protection class according to EN 60529
IP 20
Protection class
II
Flammability rating
UL94V-0
Weight
Approx. 170 g (0.375 lb)
Connection type/cable
Series terminal/copper
Connection cross section single-wire/finely
stranded
0.2 ... 4 mm
2
/0.2 ... 1.5 mm
2
(AWG 24-15)
The following current measurement transformers can be connected to the RCM
202-AB:
Transformer type Inner win-
dow mm
Sepa-
rable
Transformation
ratio
Max. primary cur-
rent
mA
DACT20
20 - 600:1
18000
CT-AC RCM 35N
35
-
700:1
20000
CT-AC RCM 80N
80
-
700:1
20000
CT-AC RCM 110N
110
-
700:1
20000
CT-AC RCM 140N
140
-
700:1
20000
CT-AC RCM 210N
210
-
700:1
20000
CT-AC RCM
A110N
110
• 700:1
20000
CT-AC RCM
A150N
150
•
700:1
20000
CT-AC RCM
A310N
310
• 700:1
20000
KBU 23D
20 x 30
•
600:1
18000
KBU 58D
50 x 80
•
600:1
18000
KBU 812D
80 x 120
•
600:1
18000
Tab. 3:
Current measurement transformer for RCM 202-AB
2
RCM 202-AB
1
Information about using this user manual
1.1
General information
This user manual is intended exclusively for use by trained specialized electrotech-
nical personnel.
This user manual is a part of the product and makes reference to other devices from
Janitza electronics GmbH. Only the names of the respective device series are spec-
ified, but not all the associated types. Read this user manual before using the device.
Observe all safety requirements and warning notices. Failure to observe the instruc-
tions can lead to personal injury and/or damage to the product.
Keep the user manual through the entire service life of the product so it is available
for all users.
For this quick start, please also note further documentation on our homepage, such
as
- user manual and safety instructions
NOTE
Further information - e.g. the
manual
- can be found in the download area at
www.janitza.com.
Janitza electronics GmbH
Vor dem Polstück 6 • 35633 Lahnau, Germany
Support Tel. +49 6441 9642-22 • E-Mail: [email protected] • www.janitza.de
RCM 202-AB
15
Connect the plug of the RS485 interface to RCM 202-AB. Connect the ground
connection of the RS485 interface with the protective conductor PE.
NOTE
The device address 1 and the baud rate of 19200 baud are factory-set.
If the RCM 202-AB is the first or last device in the Modbus line, the termina-
tion resistor must be set.
The ground terminals of all RS485 connections of multiple RCM 202-AB
must be connected with the ground wire of the cable. The ground wire must
be grounded in one point. The second wire pair of the bus cable is used as
the ground wire. Both wires of the pair are parallel connected.
The shield may be applied only on one side!
Terminate the first and last bus participants within a bus segment by pushing
the “Term” switch to the right.
NOTE
In the case of a RS485 connection from a control cabinet to a control cabi-
net, the Modbus connections B+ and A- must be electrically isolated.
Connect the current measurement transformer to the plug of the respective
current measurement input (I1 and I2). When doing so, observe the connec-
tions K and L (see also Tab. 1 on page 10).
Connect the analog and digital outputs if necessary.
Make sure that the connected connectors are still firmly seated.
Retighten all screw connections.
8.2 Commissioning
NOTE
The housing of the RCM 202-AB warms up during operation.
Connect the plug for the power supply to the N/L connection. The status LED
flashes green. RCM 202-AB initialization takes place. “I1
=
---” and “I2
=
---”
appear on the display.
Wait until initialization is completed. Initialization can take up to 60 seconds.
Initialization will take longer if the transformer measures residual currents
already during initialization.
The status LED lights up green and the measured values for the activated
measurement channels are shown on the display. The RCM 202-AB is
ready for operation.