Eastron SDM120 Modbus User manual

Eastron SDM120Modbus User Manual
Jiaxing Eastron Electronic Instruments Co.,Ltd. Tel: [phone] 83698882Fax: [phone]
Address: No.1369 Chengnan Road, Jiaxing, Zhejiang, 314001, China. Web: www.eastron.com.cn email: [e-mail]
SDM120Modbus
Single-Phase Multifunction DIN rail Meter
Measures kWh, Kvarh, KW, Kvar, KVA, PF, Hz, dmd, V, A, etc.
Di-directional measurement IMP & EXP
Two pulse outputs
RS485 Modbus
Din rail mounting 17.5mm
45A direct connection
Better than Class 1 / B accuracy
User Manual V2.2
2014

Eastron SDM120Modbus User Manual
Jiaxing Eastron Electronic Instruments Co.,Ltd. Tel: [phone] 83698882Fax: [phone]
Address: No.1369 Chengnan Road, Jiaxing, Zhejiang, 314001, China. Web: www.eastron.com.cn email: [e-mail]
Application
The energy-meters “with a blue back-lighted LCD screen for prefect reading” are used to measure single-phase like
residential, utility and Industrial application. The unit measures and displays various important electrical
parameters, and provide a RS485 communication port for remote reading and monitoring. Bi-directional energy
measurement makes the unit a good choice for solar PV energy metering. The compact design and din rail
installation provides a easy and economical solution for your metering demand.
General Specifications
Voltage AC (Un) 230V
Voltage Range 176~276V AC
Base Current (Ib) 5A
Max. Current (Imax) 45A
Mini Current (Imin) 0.25A
Starting current 0.4% of Ib
Power consumption <2W/10VA
Frequency 50/60Hz(±10%)
AC voltage withstand 4KV for 1 minute
Impulse voltage withstand 6KV-1.2uS wavform
Overcurrent withstand 30Imax for 0.01s
Pulse output rate 1000imp/kWh (default)
100/10/1 imp/kWh/kVarh (configurable)
Display LCD with blue backlit
Max. Reading 99999.9kWh
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 EN50470-3
Reactive energy 1% of range maximum

Eastron SDM120Modbus User Manual
Jiaxing Eastron Electronic Instruments Co.,Ltd. Tel: [phone] 83698882Fax: [phone]
Address: No.1369 Chengnan Road, Jiaxing, Zhejiang, 314001, China. Web: www.eastron.com.cn email: [e-mail]
Environment
Operating temperature -25℃to +55℃
Storage and transportation temperature -40℃to +70℃
Reference temperature 23℃±2℃
Relative humidity 0 to 95%, non-condensing
Altitude up to 2500m
Warm up time 10s
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(default) /0.01/0.1/1kWh/kVarh.
Pulse width: 200/100/60ms
Pulse output 2 is non-configurable. It is fixed up with 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 from the Set-up menu.
Baud rate: 1200, 2400, 4800, 9600
Parity: NONE/EVEN/ODD
Stop bits:1 or 2
Modbus Address: 1 to 247
Mechanics
Din rail dimensions 17.5x119x62 (WxHxD) DIN 43880
Mounting DIN rail 35mm
Sealing IP51 (indoor)
Material self-extinguishing UL94V-0

Eastron SDM120Modbus User Manual
Jiaxing Eastron Electronic Instruments Co.,Ltd. Tel: [phone] 83698882Fax: [phone]
Address: No.1369 Chengnan Road, Jiaxing, Zhejiang, 314001, China. Web: www.eastron.com.cn email: [e-mail]
Initialization Display
When it is powered on, the meter will initialize and do self-checking.
1 Full Screen
It will last for 3 seconds.
2 Software version
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.
1Total active energy（kWh）
Display format：0000.009999.9910000.0
99999.90000.00
1-1 Import active energy（kWh）
Display format：0000.009999.9910000.0
99999.90000.00
1-2 Export active energy（kwh）
Display format：0000.009999.9910000.0
99999.90000.00

Eastron SDM120Modbus User Manual
Jiaxing Eastron Electronic Instruments Co.,Ltd. Tel: [phone] 83698882Fax: [phone]
Address: No.1369 Chengnan Road, Jiaxing, Zhejiang, 314001, China. Web: www.eastron.com.cn email: [e-mail]
2 Voltage (V)
3 Current (A)
4 Active power (W)
5 Frequency ( F )
6 Power factor ( PF)
7 Modbus Adress ( ID)
Default: 001
8 Baudrate
Default : 2400bps
9 Parity
None/even/odd are optional
Default: none

Eastron SDM120Modbus User Manual
Jiaxing Eastron Electronic Instruments Co.,Ltd. Tel: [phone] 83698882Fax: [phone]
Address: No.1369 Chengnan Road, Jiaxing, Zhejiang, 314001, China. Web: www.eastron.com.cn email: [e-mail]
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 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 SDM120C protocol”.
Wiring diagram
1：L-in 2: L-out 3/4: N 5/6/7: PO 2+ / Com / PO 1+ 9/10：RS485 B/A
Dimensions

Eastron SDM120Modbus User Manual
Jiaxing Eastron Electronic Instruments Co.,Ltd. Tel: [phone] 83698882Fax: [phone]
Address: No.1369 Chengnan Road, Jiaxing, Zhejiang, 314001, China. Web: www.eastron.com.cn email: [e-mail]
Installation
35mm
DIN Rai l