EASTRON SDM220M Three Phase Four Wire Energy Meter User Manual

EASTRON SDM220M Three Phase Four Wire Energy Meter User Manual

Important Information

• Multi-parameter measurment
• Resettable partial energy
• Bi-directional measurement IMP & EXP
• Pulse Output
• RS485 Modbus
• Din rail mounting 35mm
• Direct connection, up to 100A
• Better than Class 1/ B accuracy

Introduction

The SDM72D-M-2 is digital 3 phase 4 wires energy meter with white back-lighted LCD screen for perfect reading.
The unit measures and displays voltage, current, frequency, power factor, active power, reactive power, active energy and reactive energy, etc. A resettable partial energy is provided, so the user can easily check the active energy imported and active energy exported during a certain period. SDM72D-M-2 supports max.100A direct connection, saving the cost and avoiding the trouble to connect external CTs, giving the unit a cost-effective and east operation. Built-in interfaces provide pulse and RS485 Modbus RTU outputs. Configuration is password protected.

PART 1 Specification

General Specifications

≤ 4VA for the current measuring circuit
Frequency| 50/60Hz (non-MID); 50Hz(MID)
AC voltage withstand| 4KV for 1 minute
Impulse voltage withstand| 6KV-1.2uS waveform
Overcurrent withstand| 30 Imax for 0.01s
Power supply| self-power supply
Display| LCD with backlit
Max. Reading| 999999.9kWh
Active energy| Class 1 IEC62053-21 (non-MID)
Class B EN50470-1/3 (MID)
Reactive energy| Class 2 IEC62053-23

Unit Characteristics

RS485 Serial – Modbus RTU

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.

Pulse output
The unit provides pulse output for active kWh. The Pulse output is passive type.
Pulse constant:
1000imp/kWh
100imp/kWh
10imp/kWh
1 imp/kWh
Pulse width: 60, 100, 200mS
Note: when the pulse constant is set to 1000 imp/kWh, the pulse width should be 35ms and cannot be adjusted. Pulse output type can be set to : total kWh, import kWh, export kWh.

RS485 Output for Modbus RTU
For Modbus RTU, the following RS485 communication parameters can be configured from the Set-up menu:
Baud rate 1200,2400, 4800, 9600, 19200 bps
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.

Environment

Operating temperature| 3K6 （-25℃ to +55℃）(default)
3K7 （-40℃ to + 70℃） (optional)
---|---
Storage and transportation temperature| -40℃ to +70℃
Reference temperature| 23℃±2℃
Relative humidity| 0 to 95%, non-condensing
Altitude| up to 2000m
Warm up time| 3s
Installation category| CAT III
Mechanical Environment| M1
Electromagnetic environment| E2
Degree of pollution| 2

Mechanics

PART 2 Operation

Initialization Display
When it is powered on, the meter will initialize and do self-checking.

| Full Screen
---|---
| Software Version
| Pulse constant
| Total active energy(kWh) Total=Import+ Export 5+2 -> 6+1 Max. reading: 999999.9 kWh

Buttons function
There are two buttons on the front panel.

| >Scroll the display for data-check.

Change option at Set-up mode
Exit the Set-up mode
---|---

| >Set-up mode entry

Confirmation

Scroll display
After initialization and self-checking program, the meter displays 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.

| Total active energy Total=Import+ Export
---|---
| Resettable partial kWh

| Import energy
| Export energy
| Total reactive energy
| Resettable reactive energy
---|---

| Voltage L1-N
| Voltage L2-N
| Voltage L3-N
| L1 current
| L2 current

| L3 current
| L1 active power

| L2 active power
---|---
| L3 active power
| Total active power
| L1 reactive power
| L2 reactive power
| L3 reactive power

| Total reactive power
| L1 Power factor
| L2 power factor
---|---
| L3 power factor
| Total Power factor
| Frequency
| Pulse output type: Default: kWh
Pulse constant: 1000imp
| Modbus Address
| Baud Rate
| Parity
| Software version
---|---

Setup Mode
To get into Setup Mode, the user need to press the “Enter” button for 3 seconds.

| | Password Default: 1000
| | Modbus address Rane:001~247 default:001
| | Buad rate Option：

1200,2400,4800,9600,

19200 bps default：9600 bps

| | Parity: Option:NONE,EVEN,ODD

default:NONE

| | Stop bit Option:1,2 default：1
| | Pulse output type Option:

Total kWh,Imp kWh,Exp kWh

Default: Total kWh

| | Pulse constant: Option:

1000,100,10,1 imp/kWh

---|---|---
|

| Pulse width Option: 60,100,200,unit:ms

Note:If pulse constant is 1000imp/kWh,pulse width

will be fixed at 35ms.

| | Automatic Scroll display set Range:0~60,unit:second default:05, 0 means do not

scroll

| | Backlit time setting Option: on,5,10,30,60,120,off

unit：minute

default：60 minute

| | System:

Option: 3P4W,1P2W default: 3P4W

| | Password: default:1000
| | Resettable partial energy

Wiring diagram
Terminals

NOTE:
Maximum Wire Size for Mainload: 25mm²

Dimensions

Installation

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. A (*) in the column indicated the parameter is valid for the particular wiring system, Any parameter with a cross (X) will return the value zero. Each parameter is held in the 3X registers. Modbus Protocol function code 04 is used to access all parameters.

Start address = 0006
Amps 2| Start address = 0008
No. Of register = 0002

Each request for data must be restricted to 30 parameters or less. Exceeding the 30 parameter limit will cause a  Modbus Protocol exception code to be returned.

Address (Register)| Input Register Parameter| Modbus Protocol Start Address Hex
---|---|---
Description| Length (bytes)| Data Format| Units| Hi Byte| Lo Byte
30001| Phase 1 line to neutral volts.| 4| Float| V| 00| 00
30003| Phase 2 line to neutral volts.| 4| Float| V| 00| 02
30007| Phase 1 current.| 4| Float| A| 00| 06
30009| Phase 2 current.| 4| Float| A| 00| 08
---|---|---|---|---|---|---
30011| Phase 3 current.| 4| Float| A| 00| 0A
30013| Phase 1 active power.| 4| Float| W| 00| 0C
30015| Phase 2 active power.| 4| Float| W| 00| 0E
30017| Phase 3 active power.| 4| Float| W| 00| 10
30019| Phase 1 apparent power.| 4| Float| VA| 00| 12
30021| Phase 2 apparent power.| 4| Float| VA| 00| 14
30023| Phase 3 apparent power.| 4| Float| VA| 00| 16
30025| Phase 1 reactive power.| 4| Float| VAr| 00| 18
30027| Phase 2 reactive power.| 4| Float| VAr| 00| 1A
30029| Phase 3 reactive power.| 4| Float| VAr| 00| 1C
30031| Phase 1 power factor (1).| 4| Float| None| 00| 1E
30033| Phase 2 power factor (1).| 4| Float| None| 00| 20
30035| Phase 3 power factor (1).| 4| Float| None| 00| 22
30043| Average line to neutral volts.| 4| Float| V| 00| 2A
30047| Average line current.| 4| Float| A| 00| 2E
30049| Sum of line currents.| 4| Float| A| 00| 30
30053| Total system power.| 4| Float| W| 00| 34
30057| Total system volt amps.| 4| Float| VA| 00| 38
30061| Total system VAr.| 4| Float| VAr| 00| 3C
30063| Total system power factor (1).| 4| Float| None| 00| 3E
30071| Frequency of supply voltages.| 4| Float| Hz| 00| 46
30073| Import active energy| 4| Float| kWh| 00| 48
30075| Export active energy| 4| Float| kWh| 00| 4A
30201| Line 1 to Line 2 volts.| 4| Float| V| 00| C8
30203| Line 2 to Line 3 volts.| 4| Float| V| 00| CA
30205| Line 3 to Line 1 volts.| 4| Float| V| 00| CC
30207| Average line to line volts.| 4| Float| V| 00| CE
30225| Neutral current.| 4| Float| A| 00| E0
30343| Total active Energy (2)| 4| Float| kWh| 01| 56
30345| Total reactive energy| 4| Float| kVArh| 01| 58
30385| resettable total active energy| 4| Float| kWh| 01| 80
30387| Resettable total reactive energy| 4| Float| kVarh| 01| 82
30389| resettable import active energy| 4| Float| kWh| 01| 84
30391| resettable export active energy| 4| Float| kWh| 01| 86
30397| Net kWh (Import – Export)| 4| Float| kWh| 01| 8C
31281| Total import active power| 4| Float| W| 05| 00
31283| Total export active power| 4| Float| W| 05| 02

Instruction:

1. The power factor has its sign adjusted to indicate the direction of the current. Positive refers to forward current, negative refers to reverse current.
2. Total active energy equals to import + export.

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.
The holding register parameters may be viewed or changed using the Modbus Protocol. Each parameter is held in two consecutive 4X registers. Modbus Protocol Function Code 03 is used to read the parameter and Function code 10 is used to write. Write only to one parameter per massage.

Address Register| Parameter| Modbus Protocol   Start Address Hex| Valid range| Mode
---|---|---|---|---
High Byte| High Byte
40011| System Type| 00| 0A| Write system type: 1 = 1P2W; 3 = 3P4W,(default); Length : 4 byte Data Format : Float (KPPA is asked)| r/w
40013| Pulse width| 00| OC| Range：60, 100, 200，unit: ms， default 100.

Note: If pulse output =1000imp/kWh，then pulse width is fixed at 35ms，and cannot be adjusted.

Length : 4 byte Data Format : Float

| r/w
40015| Key Parameter Programming Authorization (KPPA)| 00| 0E| Read: to get the status of the KPPA 0 = not authorized；1 = authorized Write the correct password to get KPPA, enable to program key parameters.

Length : 4 byte

Data Format : Float

| r/w
40019| Parity and stop bit| 00| a12| Write the network port parity/stop bits for MODBUS Protocol, where: 0 = One stop bit and no parity, default. 1 = One| r/w
| | | | stop bit and even parity. 2 = One stop bit and odd parity.3 = Two stop bits and no parity.

Length : 4 byte

Data Format : Float

|
---|---|---|---|---|---
40021| Modbus address| 00| 14| Write the network port node Address: 1 to 247 default 1.

Length : 4 byte Data Format : Float

| r/w
40023| Pulse constant| 00| 16| Option: 0~3, default 0 0 :1000 imp/kWh

1 : 100 imp/kWh

2: 10 imp/kWh

3: 1 imp/kWh

Note: If pulse output

=1000imp/kWh，then pulse width is fixed at 35ms，and cannot be adjusted.

Length : 4 byte

Data Format : Float

| r/w
40025| Password| 00| 18| Read: to get the password of the meter

Write:    to program the new password of the meter Default 1000

Length : 4 byte

Data Format : Float

| r/w
40029| Network Baud Rate| 00| 1C| Write the network port baud rate for MODBUS Protocol, where:

0 = 2400 baud. 1 = 4800 baud.

2 = 9600 baud(default).

3 = 19200 baud

5 = 1200 band Length : 4 byte Data Format : Float

| r/w
40059| Automatic Scroll Display Time| 00| 3A| Default 0，second Range 0~60 Length : 4 byte

Data Format : Float

| r/w
40061| Backlit time| 00| 3C| Default 60, min

Range 0~121, 0 means backlit always on, 121 means backlit

| r/w
| | | | always off

Length : 4 byte Data Format : Float

|
---|---|---|---|---|---
40087| Pulse 1 Energy Type| 00| 56| Pulse 1 Energy Type： 1: import active energy

2: total active energy (default) 4: export active energy Length : 4 byte

Data Format : Float

| r/w
461457| Reset historical data| F0| 10| 00 03 = reset energy info

Length : 2 byte Data Format: Hex

| wo
464513| Serial number| FC| 00| Serial number

Length : 4 byte

Data Format : unsigned int32 Note: Only read

| ro
464515| Meter code| FC| 02| Meter code

SDM72D-M-2= 00 89

Length : 2 byte Data Format : Hex Note: Only read

| ro
464645| Software version| FC| 84| The software showed on display XX.YY

Format: XX= first byte; YY= second byte

Length: 2 byte Data Format: Hex

Note: Read only

| ro

Customer Support

Zhejiang Eastron Electronic Co.,Ltd.
Address: No.1369 Chengnan Road, Jiaxing
Tel: 0086-573-83698881
Zhejiang, 314001, China.
Fax: 0086-573-83698883
Web: www.eastrongroup.com
Email: sales@eastrongroup.com

References

• Electricity Meters Manufacturers, Smart Meters Factory

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