Eastron SDM72DM User manual
Eastron SDM72DM-V2 User Manual V1.1 2021
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⚫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
B+G e-tech GmbH (EASTRON Germany) • www.eastron-germany.de • [email protected] • Fax: 03574 467550
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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B+G e-tech GmbH (EASTRON Germany) • www.eastron-germany.de • [email protected] • Fax: 03574 467550
Eastron SDM72D-M User Manual V1.1
-3 -
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
B+G e-tech GmbH (EASTRON Germany) • www.eastron-germany.de • [email protected] • Fax: 03574 467550
Eastron SDM72D-M User Manual V1.1
-4 -
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
B+G e-tech GmbH (EASTRON Germany) • www.eastron-germany.de • [email protected] • Fax: 03574 467550
Eastron SDM72D-M User Manual V1.1
-5 -
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
B+G e-tech GmbH (EASTRON Germany) • www.eastron-germany.de • [email protected] • Fax: 03574 467550
Eastron SDM72D-M User Manual V1.1
-6 -
Total reactive energy
Voltage L1-N
Voltage L2-N
Voltage L3-N
L1 current
L2 current
L3 current
L1 active power
B+G e-tech GmbH (EASTRON Germany) • www.eastron-germany.de • [email protected] • Fax: 03574 467550
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
B+G e-tech GmbH (EASTRON Germany) • www.eastron-germany.de • [email protected] • Fax: 03574 467550
Eastron SDM72D-M User Manual V1.1
-8 -
L2 power factor
L3 power factor
Total Power factor
Frequency
Pulse output type:
Default: kWh
Pulse constant: 1000imp
Pulse constant
Modbus Address
Baud Rate
B+G e-tech GmbH (EASTRON Germany) • www.eastron-germany.de • [email protected] • Fax: 03574 467550
Eastron SDM72D-M User Manual V1.1
-9 -
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
B+G e-tech GmbH (EASTRON Germany) • www.eastron-germany.de • [email protected] • Fax: 03574 467550
Eastron SDM72D-M User Manual V1.1
- 10 -
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.
B+G e-tech GmbH (EASTRON Germany) • www.eastron-germany.de • [email protected] • Fax: 03574 467550
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