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1. 

Introduction

The SDM630-EV V2 measures and displays the 
characteristics of single phase two wires (1p2w), 
three phase three wires (3p3w,) and three phase four 
wires(3p4w) supplies, including voltage, frequency, 
current, power ,active and reactive energy, imported or 
exported. Energy is measured in terms of kWh, kVArh. 
Maximum demand current can be measured over preset 
periods of up to 60 minutes. In order to measure energy, 
the unit requires voltage and current inputs in addition to 
the supply required to power the product.
SDM630-EV V2 supports max. 100A direct connection, 
saves the cost and avoid the trouble to connect external 
CTs, giving the unit a cost-effective and easy operation. 
Built-in interfaces provides pulse and RS485 Modbus RTU 
outputs. Configuration is password protected.

1.2

 Measured Parameters

The unit can monitor and display the following parameters 
of a single phase two wire(1p2w), three
phase three wire(3p3w) or four phase four wire(3p4w) 
supply.

1.3

 Voltage and Current

Phase to neutral voltages 100 to 289V a.c. 
(not for 3p3w supplies)
Voltages between phases 173 to 500V a.c. 
(3p supplies only)
Percentage total voltage harmonic distortion (THD%) for 
each phase to N ( not for 3p3w supplies)
Percentage voltage THD% between phases (three phase 
supplies only)
Current THD% for each phase

1.4

 Power Factor and 

Frequency and Max. Demand

Frequency in Hz
Instantaneous power:
Power 0 to 99999 W
Reactive Power 0 to 99999 VAr
Volt-amps 0 to 99999 VA
Maximum demanded power since last Demand reset 
Power factor
Maximum neutral demand current, since the last Demand 
reset (for 3p4w supply only)

1.5

 Energy Measurements

• 

Imported active energy 

0 to 999999.99 kWh 

• 

Exported active energy 

0 to 999999.99 kWh 

• 

Imported reactive energy 

0 to 999999.99 kVArh 

• 

Exported reactive energy 

0 to 999999.99 kVArh 

• 

Total active energy 

0 to 999999.99 kWh 

• 

Total reactive energy 

0 to 999999.99 kVArh

1.6 

Measured Inputs

Voltage inputs through 4-way fixed connector with 25mm² 
stranded wire capacity. single phase two wire(1p2w), three 
phase three wire(3p3w) or four phase four wire(3p4w) 
unbalanced. Line frequency measured from L1 voltage or 
L3 voltage.

1.7

 Accuracy

• 

Voltage  

0·5% of range maximum 

• 

Current  

0·5% of nominal 

• 

Frequency  

0·2% of mid-frequency 

• 

Power factor  

1% of unity (0.01) 

• 

Active power (W)  

±1% of range maximum 

• 

Reactive power (VAr)  

±1% of range maximum 

• 

Apparent power (VA)  

±1% of range maximum 

• 

Active energy (Wh)  

Class 1 IEC 62053-21 

 

Class B EN50470-1/3 

• 

Reactive energy (VArh)  

Class 2 IEC 62053-23 

• 

Response time to step input  1s, typical, to >99% of  

 

final reading, at 50 Hz.

SDM630-EV

DIN Rail Smart Meter for Single and 

Three Phase Electrical Systems

The interface performs a 

self-test and indicates the 

result if the test passes.

The second screen 

indicates the firmware 

installed in the unit and its 

build number.
*The build number(41 

01.00) is for reference only.
The actual build number 

changes according to 

product requirements.

Meter SN, Modbus ID and 

baud rate setting

If you have any question, please feel free to contact our sales team. Tel: 0203 758 3494 Email: [email protected]  

www.eastrongroup.com

Warnings

Important Safety Information is contained in the 
Maintenance section. Familiarize yourself with this 
information before attempting installation or other 
procedures. Symbols used in this document:

Risk of Danger:

 These instructions contain 

important safety information. Read them before 
starting installation or servicing of the equipment.

Caution: Risk of Electric Shock

• 

Measures kWh Kvarh, KW, Kvar, KVA, P, F,  

  PF, Hz, dmd, V, A, etc.

• 

Bi-directional measurement IMP & EXP

• 

Pulse output

• 

RS485 Modbus

• 

Din rail mounting 35mm

• 

100A direct connection

• 

Better than Class 1 / B accuracy

1.8

 Interfaces for External 

Monitoring

Three interfaces are provided:

• 

2 RS485 communication channels via protocol remotely.

• 

Pulse output indicating real-time measured energy.

1.9

 Pulse Output

Pulse output is non-configurable. It is fixed up with active 
kWh. The constant is 400imp/kWh.

1.10

 RS485 Output for 

Modbus RTU

There 2 two channels of RS485 Modbus RTU.
For Modbus RTU, the following RS485 communication 
parameters can be configured from the
Set-up menu:

• 

1st Modbus Output (configurable): 

 

Baud rate

 2400, 4800, 9600(default), 19200, 38400 

 

Parity

 none (default)/odd/even 

 

Stop bits

 1 or 2 

 

 RS485 network address

 nnn – 3-digit number, 

001 to 247

• 

2nd Modbus Pitput (non-configurable): 

 

Baud rate

 9600 

 

Parity

 none 

 

Stop bits

 1 

  

Modbus™ Word order 

Hi/Lo byte order is set 

automatically to normal or reverse. It cannot be 
configured from the set-up menu.

1.11

 Reference Conditions of 

Influence Quantities

Influence Quantities are variables that affect measurement 
errors to a minor degree. Accuracy is
verified under nominal value (within the specified tolerance) 
of these conditions.

• 

Ambient temperature   

23°C ±1°C 

• 

Input frequency  

 

50Hz(MID) 

 

 

 

 

50 or 60Hz ±2% 

   

 

(non- 

MID) 

• 

Input waveform  

 

Sinusoidal (distortion  

 

 

 

 

factor < 0·005) 

• 

Magnetic field of external origin   Terrestrial flux

1.12

 Environment

• 

Operating temperature  

3K6(-25°C to  

   

 

+55°C*),Default 

 

 

 

 

3K7(-40°C to +70°C*) 

• 

Storage temperature   

-40°C to +70°C* 

• 

Relative humidity  

 

0 to 90%, non- 

   

 

condensing 

• 

Altitude    

 

Up to 2000m 

• 

Warm up time  

 

5S 

• 

Vibration   

 

10Hz to 50Hz,  

 

 

 

 

IEC 60068-2-6, 2g 

• 

Shock    

 

30g in 3 planes

* Maximum operating and storage temperatures are in the context of 
typical daily and seasonal variation.

1.13

 Unit Characteristics

The Unit can measure and display:

• 

Line voltage and THD% (total harmonic distortion) 

  of all phases 

• 

Line Frequency 

• 

Currents, Current demands and current THD% of  

  all phases 

• 

Power, maximum power demand and power factor 

• 

Active energy imported and exported 

• 

Reactive energy imported and exported

The unit has password-protected set-up screens for:

• 

Changing password 

• 

Supply system selection 1p2w, 3p3w,3p4w 

• 

Demand Interval Time(DIT) 

• 

Reset for demand measurements

The pulse output indicates real-time energy measurement. 
2 RS485 outputs allows remote monitoring from another 
display or a computer.

2.

 Start-up Screens

Selects the Voltage and Current display screens 

In Set-up Mode, this is the “Left” or “Back” button.

Select the Frequency and Power factor display 

screens 

In Set-up Mode, this is the “Up” button

Select the Power display screens
In Set-up Mode, this is the “Down” button

Select the Energy display screens
In Set-up mode, this is the “Enter” or “Right” button

After a short delay, the screen will display active energy 
measurements.

2.1

 Measurements

The buttons operate as follows:

2.2

 Voltage and Current

Each successive pressing of the                button selects 
a new range:

Phase to neutral 

voltages(3p4w)

Phase to neutral 

voltages(3p3w)

Current on each phase

Neutral current

2.3

 Frequency and Power 

Factor and Demand

Each successive pressing of the                button selects 
a new range:

Power Factor

Maximum Current Demand

Maximum Power Demand

2.4

 Power

Each successive pressing of the                button selects 
a new range:

Instantaneous Active 

Power in W

Instantaneous Reactive 

Power in VAr

Instantaneous Volt-amps 

in VA

Total W, VArh, VA

2.5

 Energy Measurements

Each successive pressing of the                button selects 
a new range:

Total kWh and time will be 

showed when no charging

Total kWh and charged 

kWh will be showed when 

charging

CSID Numbers And current 

time will be showed when 

charging

Total active kWh, import 

active kWh, export active 

kWh

Total reactive kWh, import 

reactive kWh, export 

reactive kWh

2.6

 Set-up

To enter set-up mode, pressing the                button for 3 
seconds, until the password screen appears.

Setting up is password-protected so you must enter the 
correct password (default ‘1000’) before processing. If 
an incorrect password is entered, the display will show: 
PASS Err
To exit setting-up mode, press                repeatedly until 
the measurement screen is restored.

Setting - Button operation

3

 Set-up Entry Methods

Some menu items, such as password, require a four-digit 
number entry while others, such as supply system, require 
selection from a number of menu options.

3.1

 Menu Option Selection

1) Use the            and            buttons to select the 
required item from the menu. Selection does not roll over 
between bottom and top of list.
2) Press            to confirm your selection.
3) If an item flashes, then it can be adjusted by the                
and            buttons. If not, there maybe a further layer.
4) Having selected an option from the current layer press         
to confirm your selection. The SET indicator will appear.
5) Having completed a parameter setting, press            to 
return to a higher menu level. The SET indicator will be 
removed and you will be able to use the            and 
buttons for further menu selection.
6) On completion of all set-up, press             repeatedly 
until the measurement screen is restored.

3.2

 Number Entry Procedure

When setting up the unit, some screens require the 
entering of a number. In particular, on entry to the setting 
up section, a password must be entered. Digits are set 
individually, from left to right.
The procedure is as follows:
1) The current digit to be set flashes and is set using  
the            and            buttons.

2) Press            to confirm each digit setting. The SET 
indicator appears after the last digit has been set.
3) After setting the last digit, press            to exit the 
number setting routine.

3.3

 Main set

System type

From the Set-up menu, use

        

and 

buttons to select the System option. The screen 
will show the currently selected system type.

Password

Use the

        

and

        

to choose the change 

password option.

Reset

Press to enter the selection routine. If succeed, 
the cursor will jump back to Reset.

Press

        

to exit the number setting routine and return to the 

Set-up menu. SET will be removed.

3.4

 Communication set

Addr

From the Set-up menu, use

        

and  

buttons to select the Address ID.

Baud

From the Set-up menu, use

        

and  

buttons to select the Baud Rate option.

Parity

From the Set-up menu, use

        

and  

buttons to select the Parity option.

3.5

 Time set

Data

From the Set-up menu, use

        

and

        

buttons to select the data. 
Use

        

to move cursor

Time

From the Set-up menu, use

        

and

        

buttons to select the data. 
Use

        

to move cursor

DMD

From the Set-up menu, use

        

and

        

buttons to select the dmd. Setting options: 0, 5, 
8, 10, 15, 20, 30, 60

ZONE

From the Set-up menu, use

        

and

        

buttons to select the ZONE. Setting range:-12~12

Backlight

From the Set-up menu, use

        

and 

buttons to select the Backlight. Setting options: 
on,10, 30, 60, 120, off

Use

        

and

        

buttons to select the time interval. Press 

        

to confirm the set-up.

3.6

 Record

Record

From the Set-up menu, use

        

and  

buttons to select record data.  
Max.: lastest 10 records

Use

        

and

        

buttons to select the time interval.

1.Main

1.1Sytem Type 

3P4W

1.2Password 1000
1.3Reset DMD

2.Communication

2.1Addr

 002

2.2Baud 9600
2.3Parity NONE

4.Time

4.1Data

 14-01-30

4.2Time 08-15-14
4.3DMD 60

4.Time

4.4ZONE

 +08

4.5Backlight 060

5.Record

CSID:20140130000005

T: 00:00:03
C: 000006wh

PASSWORD :

0

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User Manual

2022 V1.0

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