JIAXING EASTRON ELECTRONIC INSTRUMENTS
CO.,LTD.
TEL:0086-573-83698881 83698882 FAX: 0086-573-83698883
WEB: www.eastrongroup.com Email: sales@eastrongroup.com
Add: No.1369. Chengnan Road, Nanhu, Jiaxing, Zhejiang, China 314001.
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1 Introduction
Introduction
Introduction
Introduction
This document provides operating, maintenance and installation instructions for the Eastron SDM630 din
rail mounted energy meter. T he unit measures and displays the characteristics of single phase two wires and
three phase four wires supplies, including voltage, frequency, current, power and active and reactive energy,
imported or exported. E nergy is measured in terms of kWh, kVarh. Maximum demand current can be
measured over preset periods of up to 60minutes. I n order to measure energy, the unit requires voltage and
current inputs in addition to the supply required to power the product. T he requisite current input(s) are
obtained via current transformers (CT).
The SDM630 can be configured to work with a wide range of CTs, giving the unit a wide range of
operation. Built-in interfaces provide pulse and RS485 Modbus RTU outputs. C onfiguration is password
protected.
The unit can be powered from a separate auxiliary ( AC or DC) supply. Alternatively it can be powered
from the monitored supply, where appropriate.
1.1
1.1
1.1
1.1 Unit
Unit
Unit
Unit Characteristics
Characteristics
Characteristics
Characteristics
T he SDM630 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
�A ctive energy imported and exported
�R eactive energy imported and exported
T he unit has password-protected set-up screens for:
�Changing password
�S upply system selection 1phase2wire, 3phase 4wires
�CT primary current (1 to 9999A)
�PT (1 to 500000V)
�Demand Interval time
�Reset for demand measurements
�Pulse output duration
A pulse output indicates real-time energy measurement . A n RS485 output allows remote monitoring from
another display or a computer.
1.2
1.2
1.2
1.2 Current
Current
Current
Current Transformer
Transformer
Transformer
Transformer Primary
Primary
Primary
Primary Current
Current
Current
Current
The unit can be configured to operate with CT primary current of between 1 and 9999A. Maximum CT
primary current corresponds to a maximum input current to the unit of 5A.
1.3
1.3
1.3
1.3 RS485
RS485
RS485
RS485 Serial
Serial
Serial
Serial –
–
–
– Modbus
Modbus
Modbus
Modbus RTU
RTU
RTU
RTU
This uses an RS485 serial port with Modbus RTU protocol to provide a means of remotely monitoring and