Eastron SDM72DM User manual

Eastron SDM72DM-V2 User Manual V1.1 2021
-1 -
⚫Multi-parameter measurment
⚫Resettable partial energy
⚫Bi-directional measurement IMP & EXP
⚫Pulse Output
⚫RS485 Modbus
⚫Din rail mounting 35mm
⚫Direct connection, up to 80A
⚫Better than Class 1/ B accuracy
SDM72DM -multi-function version
Three Phase Four Wire Energy Meter
User Manual V1.1
2021
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Eastron SDM72D-M User Manual V1.1
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 voltage, current, frequency, power factor, active power, reactive power, active
energy and reactive energy. 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 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 provide 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 for the voltage measuring circuit
≤ 4VA for the current measuring circuit
Frequency 50/60Hz (±10%)
AC voltage withstand 4KV for 1 minute
Impulse voltage withstand 6KV-1.2uS wavform
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
Class B EN50470-3
Reactive energy Class 2 IEC62053-23
Unit Characteristics
Characteristics: Accuracy: Resolution:
⚫Voltage 0.5% ≤ 0.1V
⚫Current 0.5% ≤ 0.1A
⚫Frequency 0.2% ≤ 0.2%
⚫Power factor 1% ≤ 0.1
⚫Active power 1% ≤ 0.1kW
⚫Reactive Power 1% ≤ 0.1 kVAr
⚫Active energy imported and exported 1%
⚫Reactive energy 2%
≤ 0.1kWh
≤ 0.1 kVArh
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Eastron SDM72D-M User Manual V1.1
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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 1000imp/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 set up menu.
Environment
Operating temperature -25℃ to +55℃
Storage and transportation temperature -40℃ to +70℃
Reference temperature 23℃±2℃
Relative humidity 0 to 95%, non-condensing
Altitude up to 3000m
Warm up time 10s
Installation category CAT III
Mechanical Environment M1
Electromagnetic environment E2
Degree of pollution 2
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Eastron SDM72D-M User Manual V1.1
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Mechanics
Din rail dimensions 72x100x66 (WxHxD) DIN 43880
Mounting DIN rail 35mm
Protection against penetration of dust and water IP51 (indoor)
Material self-extinguishing UL94V-0
Wiring
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 read: 999999.9 kWh
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Eastron SDM72D-M User Manual V1.1
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Scroll display
Buttons function
There are two buttons on the front panel.
>Scroll the display for data checking.
>Changing option at Set-up mode
>Exit the Set-up mode
>Set-up mode entry
>Confirmation
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.
Total active energy(kWh)
Total=Import+ Export
Resettable partial kWh
import energy
export energy
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Eastron SDM72D-M User Manual V1.1
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Total reactive energy
Voltage L1-N
Voltage L2-N
Voltage L3-N
L1 current
L2 current
L3 current
L1 active power
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Eastron SDM72D-M User Manual V1.1
-7 -
L2 active power
L3 active power
Total active power
L1 reactive power
L2 reactive power
L3 reactive power
Total reactive power
L1 Power factor
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Eastron SDM72D-M User Manual V1.1
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L2 power factor
L3 power factor
Total Power factor
Frequency
Pulse output type:
Default: kWh
Pulse constant: 1000imp
Pulse constant
Modbus Address
Baud Rate
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Eastron SDM72D-M User Manual V1.1
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Parity
Software version
Set-up Mode
To get into Set-up Mode, the user need press the “Enter” button for 3 seconds.
Setting interface
Setting statu
Option:
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
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Eastron SDM72D-M User Manual V1.1
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Pulse output type
Option：
Total kWh，Imp kWh，
Exp kWh
Default：Total kWh
Pulse constant:
Option:
1000，100，10，1
imp/kWh
The default pulse output is
related to the CT1 value.
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：0, means do not
scroll
Backlit time setting
Option:
on,5,10,20,30,60,120,off
unit：minute
default：60 minute
System:
Option: 3P4W,1P2W，
default: 3P4W。
Password:
default：1000
Resettable partial energy
Keep pressing button to exit the set-up mold.
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Eastron SDM72D-M User Manual V1.1
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Wiring diagram
NOTE:
Maximum Wire Size for Mainload: 25mm²
Dimensions
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Eastron SDM72D-M User Manual V1.1
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Installation
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Eastron SDM72D-M User Manual V1.1
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Input Registers
PART 3 Modbus Protocol
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.
For example, to request: Amps 1 Start address = 0006
No.of registers = 0002
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
(Registe
r)
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
30005
Phase 3 line to neutral volts.
4
Float
V
00
04
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
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Eastron SDM72D-M User Manual V1.1
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Holding Registers
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
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 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
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Eastron SDM72D-M User Manual V1.1
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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
12
Write the network port parity/stop bits for MODBUS Protocol, where: 0 =
One stop bit and no parity, default. 1 = One 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
r/w
40021
Modbus address
00
14
Write the network port node
Address: 1 to 247 for MODBUS Protocol, default 1.
Length : 4 byte
Data Format : Float
r/w
40023
Pulse constant
00
16
Option: 0~3，默认0
0 : 1000 imp/kWh
1 : 100 imp/kWh
2：10 imp/kWh
3 ：1 imp/kWh
Note: If pulse output =1000imp/kWh，then pulsewidth 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
r/w
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Eastron SDM72D-M User Manual V1.1
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Length : 4 byte
Data Format : Float
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 always off
Length : 4byte
Data Format : Float
r/w
40087
Pulse 1 Energy Type
00
56
Pulse 1 Energy Type：
1: import active energy
2: total active energy
4: export active energy, (default)
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 = 00 89
Length : 2 byte
Data Format : Hex
Note: Only read
ro
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