Eastron SDM72CT-M User Manual

Eastron SDM72CT-M User Manual
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
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 Measures kWh, kVArh, W, Var, VA, PF, Hz, V, A etc.
 Bi-directional measurement IMP & EXP
 Two pulse outputs
 RS485 Modbus
 Din rail mounting 35mm
 1/5A CT connection
 Better than Class 1/ B accuracy
SDM72CT-M
Three Phase Four Wire Energy Meter
User Manual V1.0
2018

Eastron SDM72CT-M Specifications

General

Rated Voltage (Un)	230V AC
Base Current (Ib)	5 A
Maximum Current (Imax)	100A
Power Consumption	< 2W / 10VA
Accuracy	Class 1
Impulse Voltage	6kV
Operating Temperature	-25°C to +55°C
Storage Temperature	-40°C to +70°C
Mounting	DIN rail
Display	LCD
Communication	RS485
Voltage	230V AC
Measurement Parameters	Voltage, Current, Power, Energy
Frequency	50/60 Hz
Protocol	Modbus RTU
Weight	0.3 kg
Protection Class	IP51
Humidity	≤95% RH (non-condensing)
Current	100A
Voltage Range	80-300V AC

Summary

Introduction

Specification

General Specifications

Details electrical and operational parameters such as voltage, current, frequency, and display characteristics.

Unit Characteristics

Lists the various electrical parameters the unit can measure and display, including voltages, currents, and energy types.

Current Transformer Primary Current

RS485 Serial Modbus RTU

Pulse Output

RS485 Output Parameters

Environment

Mechanics

Operation

Initialization Display

Describes the meter's initialization and self-checking process upon power-on.

Buttons Function

Details the functions of the two buttons on the front panel for navigation and mode selection.

Scroll Display

Set-up Mode

Password Configuration

Explains the password confirmation process for entering set-up mode and its default value.

Modbus Address Configuration

Describes how to set the Modbus network address for the meter.

Baud Rate Configuration

Details the available baud rates for Modbus communication and how to select them.

Parity Configuration

Explains how to configure the parity settings (EVEN, ODD, NONE) for Modbus communication.

CT Ratio Configuration

Password Change

Wiring Diagram

Dimensions

Modbus Protocol

Input Registers

Lists and describes the input registers used to access measured and calculated electrical quantities.

Holding Registers

Pulse 1 Width Configuration

Details the parameter for configuring the pulse 1 width, including valid range and data format.

Access Authority

Describes how to get or set the access authority status, including password requirements.

Parity and Stop Bits Configuration

Pulse 1 Rate Configuration

Pulse 1 Energy Type Configuration

Serial Number