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B+G e-tech and Eastron - SDM72CT-M User Manual
SDM72CT-M
Three Phase Four Wire Energy Meter
T: +49 3574 467550 F: +49 3574 4675519 M: info@bg-etech.de
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Measures kWh, W etc.
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Bi-directional measurement IMP & EXP
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Two pulse outputs
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RS485 Modbus
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Din rail mounting 35mm
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1/5A CT connection
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Better than Class 1/ B accuracy
B+G e-tech GmbH ° Fr.-Mehring Str. 36 ° DE 01979 Lauchhammer
User Manual V1.4
W: www.eastron-germany.de
2017
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Table of Contents
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Summary of Contents for Eastron SDM72CT-M
- Page 1 B+G e-tech and Eastron - SDM72CT-M User Manual SDM72CT-M Three Phase Four Wire Energy Meter ⚫ Measures kWh, W etc. ⚫ Bi-directional measurement IMP & EXP ⚫ Two pulse outputs ⚫ RS485 Modbus ⚫ Din rail mounting 35mm ⚫ 1/5A CT connection ⚫...
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Page 2: Specification
B+G e-tech and Eastron - SDM72CT-M User Manual Introduction The SDM72CT-M is digital three phase 4 wire energy meter with a white back-lighted LCD screen for perfect reading. The unit measures and displays the characteristics of three phase four wires(3p4w) supply, including power, active energy, imported or exported. - Page 3 B+G e-tech and Eastron - SDM72CT-M User Manual Current Transformer Primary Current The unit can be configured to operate with CT ratio between primary current and secondary current. The secondary CT has two options: 1A/5A RS485 Serial – Modbus RTU...
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Page 4: Operation
B+G e-tech and Eastron - SDM72CT-M User Manual Mechanics Din rail dimensions 72x100x66 (WxHxD) DIN 43880 Mounting DIN rail 35mm Sealing IP51 (indoor) Material self-extinguishing UL94V-0 PART 2 Operation Initialization Display When it is powered on, the meter will initialize and do self-checking. - Page 5 B+G e-tech and Eastron - SDM72CT-M User Manual Scroll display 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, please press the scroll button on the front panel.
- Page 6 B+G e-tech and Eastron - SDM72CT-M User Manual CT ratio Pulse 1 Modbus Address Baud Rate Parity B+G e-tech GmbH ° Fr.-Mehring Str. 36 ° DE 01979 Lauchhammer - 6 - T: +49 3574 467550 F: +49 3574 4675519 M: info@bg-etech.de...
- Page 7 B+G e-tech and Eastron - SDM72CT-M User Manual Set-up Mode To get into Set-up Mode, the user need press the “Enter” button for 3 second. Page Display Descriptions Password To get into Set-up mode, it asks a password confirmation. Default password: 1000 to enter correct password.
- Page 8 B+G e-tech and Eastron - SDM72CT-M User Manual 0001 to 2000. For example, if using a 100A/5A current transformer, you shall enter 0020. Keep press for 3s to confirm the selection. to select the Password option. Keep pressing for 3 second, the current selection will flash, use to enter the new password.
- Page 9 B+G e-tech and Eastron - SDM72CT-M User Manual Wiring diagram Dimensions B+G e-tech GmbH ° Fr.-Mehring Str. 36 ° DE 01979 Lauchhammer - 9 - T: +49 3574 467550 F: +49 3574 4675519 M: info@bg-etech.de W: www.eastron-germany.de...
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Page 10: Modbus Protocol
B+G e-tech and Eastron - SDM72CT-M User Manual PART 3 Modbus Protocol Input Registers Input registers are used to indicate the present values of the measured and calculated electrical quantities. Each parameter is held in two consecutive 16 big register. The following table details the 3X register address, and the values of the the address bytes within the message. -
Page 11: Holding Registers
B+G e-tech and Eastron - SDM72CT-M User Manual Holding Registers Holding register are used to store and display instrument configuration settings. All holding registers not listed in the table below should be considered as reserved for manufacturer use and no attempt should be made to modify their values. - Page 12 B+G e-tech and Eastron - SDM72CT-M User Manual 5-100kwh/imp Length : 4 byte Data Format : Float Read：get password Write：change password 40025 Password Length : 4 byte Data Format : Float Write the network port baud rate for MODBUS Protocol, where: 0 = 2400 baud.
- Page 13 B+G e-tech and Eastron - SDM72CT-M User Manual Accessory CTs Split Core CTs ESCT-T Series Model Primary (A) Second Output (A) Accuracy ESCT-T24 5A or 1A 0.5 or 1 ESCT-T24 5A or 1A 0.5 or 1 ESCT-T24 5A or 1A 0.5 or 1...