Eastron SDM120CTM User manual

Eastron SDM120-CTM User Manual
Zhejiang Eastron Electronic Co.,Ltd. Tel: [phone] Fax: [phone]
Add: No.1369 Chengnan Road, Jiaxing, Zhejiang, 314001, China. Web: www.eastron.com.cn Email: [e-mail]
SDM120CTM
Single-Phase Multifunction DIN Rail Meter
Measures kWh, kVArh, kW, kVAr, kVA, PF, Hz, dmd, V, A, etc.
Bi-directional measurement IMP & EXP
Two pulse outputs
RS485 Modbus
Din rail mounting 35mm
1A or 5A CT connection
Better than Class 1 accuracy
User Manual V1.2

Eastron SDM120-CTM User Manual
Zhejiang Eastron Electronic Co.,Ltd. Tel: [phone] Fax: [phone]
Add: No.1369 Chengnan Road, Jiaxing, Zhejiang, 314001, China. Web: www.eastron.com.cn Email: [e-mail]
Application
The energy-meters are used to measure single-phase applications like residential, utility and Industrial. The unit
measures and displays various important electrical parameters. It equipped with a white back-lighted LCD screen
for prefect reading. As well as a RS485 communication port for remote reading and monitoring. Bi-directional
energy measurement makes it a good choice for solar PV energy metering. The compact design and din rail
installation provides an easy and economical solution for your metering demand.
PART 1 Specification
General Specifications
Voltage AC (Un) 230V
Voltage Range 176~276V AC
Base Current (Ib) 5A
Power consumption <2W/10VA
Frequency 50/ 60Hz(±10%)
AC voltage withstand 4KV for 1 minute
Impulse voltage withstand 6KV-1.2uS waveform
Overcurrent withstand 20Imax for 0.5s
Pulse output 1 0.001/0.01/0.1/1 kWh/imp (configurable)
Pulse output 2 1000imp/kWh (default)
Display LCD with white backlit
Max. Reading 999999 kWh
Accuracy
Voltage 0.5% of range maximum
Current 0.5% of nominal
Frequency 0.2% of mid-frequency
Power factor 1% of Unity
Active power 1% of range maximum
Reactive power 1% of range maximum
Apparent power 1% of range maximum
Active energy Class 1 IEC62053-21
Class B EN50470-1/3
Reactive energy Class 2 IEC62053-23
Environment
Operating temperature -25℃to +55℃
Storage and transportation temperature -40℃to +70℃
Reference temperature 23℃±2℃

Eastron SDM120-CTM User Manual
Zhejiang Eastron Electronic Co.,Ltd. Tel: [phone] Fax: [phone]
Add: No.1369 Chengnan Road, Jiaxing, Zhejiang, 314001, China. Web: www.eastron.com.cn Email: [e-mail]
Relative humidity 0 to 95%, non-condensing
Altitude up to 2000m
Warm up time 5s
Installation category CAT II
Mechanical Environment M1
Electromagnetic environment E2
Degree of pollution 2
Output
Pulse Output
The meter provides two pulse outputs. Both pulse outputs are passive type.
Pulse output 1 is configurable. The pulse output can be set to generate pulses to represent total /import/ export
kWh or kVArh.
The pulse constant can be set to generate 1 pulse per: 0.001/0.01/0.1/1 kWh/kVArh.
Pulse width: 200/100/60ms
Pulse output 2 is non-configurable. It is fixed to total kWh. The constant is 1000imp/kWh.
RS485 output for Modbus RTU
The meter provides a RS485 port for remote communication. Modbus RTU is the protocol applied. For Modbus
RTU, the following RS485 communication parameters can be configured by the Modbus command.
Baud rate: 1200, 2400, 4800, 9600 bps. Default: 2400 bps
Parity: NONE/EVEN/ODD
Stop bits:1 or 2
Modbus Address: 1 to 247
Mechanics
Din rail dimensions 18x118x64 (WxHxD) DIN 43880
Mounting DIN rail 35mm
Ingress protection IP51 (indoor)
Material Self-extinguishing UL94V-0
PART 2 Operation
Initialization Display
When it is powered on, the meter will initialize and do self-checking.

Eastron SDM120-CTM User Manual
Zhejiang Eastron Electronic Co.,Ltd. Tel: [phone] Fax: [phone]
Add: No.1369 Chengnan Road, Jiaxing, Zhejiang, 314001, China. Web: www.eastron.com.cn Email: [e-mail]
1
Full Screen
It will last for 3 seconds.
2
Software version in kind prevail
It will last for 3 seconds.
After the self-checking program, the meter display will show the total active energy (kWh)
Scroll Display by Button
There is a button on the front of the meter. After initialization and self-checking program, the meter display the
measured values. The default page is total kWh. If the user wants to check other information, he needs to press
the scroll button on the front panel.
Click the button, the LCD display will scroll the measurements.
Keep pressing the button for 3 seconds, the meter will get into set-up mode.
1
Total active energy
（
kWh
）
Display format：0000.009999.9910000.0
99999.90000009999990000.00
2
Import active energy
（
kWh
）
Display format：0000.009999.9910000.0
99999.90000009999990000.00
3
Export active energy
（
kWh
）
Display format：0000.009999.9910000.0
99999.90000009999990000.00
4
Voltage (V)
5
Current (A)

Eastron SDM120-CTM User Manual
Zhejiang Eastron Electronic Co.,Ltd. Tel: [phone] Fax: [phone]
Add: No.1369 Chengnan Road, Jiaxing, Zhejiang, 314001, China. Web: www.eastron.com.cn Email: [e-mail]
6
Active power (W)
7
Frequency ( F )
8
Power factor ( PF)
9
Modbus Address ( ID)
Default: 001
10
Baud rate
Default : 2400bps
11
Parity
Option: None/even/odd
Default: none
12
CT1
Primary current 5A-9999A
Default: 5
13
CT2
Secondary current 1A or 5A
Default:5

Eastron SDM120-CTM User Manual
Zhejiang Eastron Electronic Co.,Ltd. Tel: [phone] Fax: [phone]
Add: No.1369 Chengnan Road, Jiaxing, Zhejiang, 314001, China. Web: www.eastron.com.cn Email: [e-mail]
14
Software version in kind prevail
Set-up Mode
To get into set-up mode, the user need keep pressing the button for 3 seconds, the meter LCD will shows “-SET-“.
The meter support to set the CT 1 through button. Under the “-SET” menu, pressing the button again for 3
seconds, enter into the CT1 setting mode.
Under this menu, long press the button
for 3 seconds enter to the set up
mode.
The rightmost digit will flash, press the button to select the CT1 value.
(Range: 5. 10. 20. 30. 40. 50. 75. 100. 125. 150. 200. 250. 300. 400. 600)
After the setting the value, press the button for 3 seconds to confirm the setting.
Meanwhile, the display will back to the “total kWh” menu.
The user can program the meter parameters by sending correct command via RS485 port.
The protocol is Modbus RTU. For the details. Please look at the “Eastron SDM120CTM Modbus protocol”.
Wiring Diagram
Dimensions

Eastron SDM120-CTM User Manual
Zhejiang Eastron Electronic Co.,Ltd. Tel: [phone] Fax: [phone]
Add: No.1369 Chengnan Road, Jiaxing, Zhejiang, 314001, China. Web: www.eastron.com.cn Email: [e-mail]
Installation
35mm
DIN Rail