EASTRON SDM630MCT User Manual
Address: No.1369 Chengnan Road, Jiaxing, Zhejiang, 314001, China.
Tel: 0086-573-83698881/83698882 Fax: 0086-573-83698883 Web: www.eastron.com.cn
Pulse Output
The unit 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
kWh or kVarh.
The pulse constant can be set to generate 1 pulse per:
0.01 = 10 Wh/VArh
0.1 = 100 Wh/VArh
1 = 1 kWh/kVArh
10 = 10 kWh/kVArh
100 = 100 kWh/kVArh
1000=1000 kWh/kVArh
Pulse width: 200/100(default)/60ms
Pulse output 2 is non-configurable. It is fixed up with total kWh. The constant is 3200imp/kWh.
RS485 Output for Modbus RTU
For Modbus RTU, the following RS485 communication parameters can be configured from the
Set-up menu:
Baud rate 2400, 4800, 9600, 19200, 38400
Parity none (default)/odd/even
Stop bits 1 or 2
RS485 network address nnn – 3-digit number, 001 to 247
Modbus™ Word order Hi/Lo byte order is set automatically to normal or reverse. It cannot
be configured from the set-up menu.
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 50 or 60Hz ±2%
Input waveform Sinusoidal (distortion factor < 0·005)
Auxiliary supply voltage Nominal ±1%
Auxiliary supply frequency Nominal ±1%
Auxiliary supply waveform (if AC) Sinusoidal (distortion factor < 0·05)
Magnetic field of external origin Terrestrial flux
Environment
Operating temperature -25°C to +55°C*
Storage temperature -40°C to +70°C*
Relative humidity 0 to 90%, non-condensing
Protection rating Front panel : IP51, others : IP20
Altitude Up to 2000m
Warm up time 1 minute
Vibration 10Hz to 50Hz, IEC 60068-2-6, 2g
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