Eastron SDM72D-M User Manual V1.5
Zhejiang Eastron Electronic Co.,Ltd. Tel: 0086-573-83698881 83698882 Fax: 0086-573-83698883
Address: No.1369 Chengnan Road, Jiaxing, Zhejiang, 314001, China. Web: www.eastron.com.cn Email: sales@eastrongroup.com
Introduction
The SDM72D-M is digital three phase 4 wire energy meter with a white back-lighted LCD screen for perfect
reading. The unit measures and displays active energy (kWh) and power ( W), imported and exported. A resettable
partial energy is provided, so the user can easily check the energy imported and energy exported during a certain
period. SDM72D-M supports max.100A direct connection, saves the cost and avoid the trouble to connect
external CTs, giving the unit a cost-effective and east operation. Built-in interfaces provides pulse and RS485
Modbus RTU outputs. Configuration is password protected.
PART 1 Specification
General Specifications
Voltage AC (Un) 3x230(400)V
Voltage Range 80~120% Un
Base Current (Ib) 10A AC
Max. Current (Imax) 100A AC
Mini Current (Imin) 5% of Ib AC
Starting current 0.4% of Ib
Power consumption <2W/10VA
Frequency 50/60Hz
AC voltage withstand 4KV for 1 minute
Impulse voltage withstand 6KV-1.2uS wavform
Overcurrent withstand 30max 0I for 0.01s
Pulse output rate 1000imp/kWh (Pulse 2)
Display LCD with backlit
Max. Reading 999999.9kWh
Active energy Class 1 IEC62053-21
Class B EN50470-3
Unit Characteristics
The Unit can measure and display:
Pulse output indicates real-time energy measurement. An RS485 output allows remote monitoring from another
display or a computer.
RS485 Serial Modbus RTU
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This unit uses an RS485 serial port with Modbus RTU protocol to provide a means of remotely monitoring and
controlling the Unit
Set-up screens are provided for setting up the RS485 port.