Eastron SDM120-CT-MV User manual

2
SDM120-MODBUS/CT-MV Technical Data
1
Safety Instructions
Information for your own safety
This manual does not contain all of the safety measures for operation of
the equipment(module,device),because special operating conditions,
and local code requirements or regulations may necessitate further
measures. However,it does contain information which must be read
for your personal safety and to avoid material damages.This information
is highlighted by a warning triangle and is represented as follows,
depending on the degree of potential danger.
Warning
This means that failure to observe the instruction can result in
death, serious injury or considerable material damage.
Caution
This means hazard of electric shock and failure to take the
necessary safety precautions will result in death,serious injury
or considerable material damage.
Qualified personnel
Operation of the equipment (module, device) described in this manual
may only be performed by qualied personnel. Qualied personnel in
this manual means person who are authorized to commission, start
up, ground and label devices,systems and circuits according to safety
and Regulatory standards.
Use for the intended purpose
The equipment (device, module) may only be used for the application
specied in the catalogue and the user manual,and only be connected
with devices and components recommended and approved by EASTRON.
Proper handling
The prerequisites for perfect, reliable operation of the product are proper
transport, proper storage, installation and assembly, as well as proper
operation and maintenance. When operating electrical equipment, certain
parts of this equipment automatically carry dangerous voltages. Improper
handling can therefore result in serious injuries or material damage.
Use only insulating tools.
Do not connect while circuit is live (hot).
Place the meter only in dry surroundings.
Do not mount the meter in an explosive area or expose the meter
to dust, mildew and insects.
Make sure the used wires are suitable for the maximum current of
this meter.
Make sure the AC wires are connected correctly before activating
the current/voltage to the meter.
Do not connect the meter to a 3 phase - 400VAC - network.
Do not touch the meter connecting clamps directly with your bare
hands, with metal, blank wire or other material as you may get an
electrical shock.
Make sure the protection cover is placed after installation.
Installation, maintenance and reparation should only be done by
qualied personnel.
Never break the seals and open the front cover as this might inuence
the functionality of the meter, and will avoid any warranty.
Do not drop, or allow physical impact to the meter as there are high
precision components inside that may break.
JIAXING EASTRON ELECTRONIC INSTRUMENTS CO., LTD.
Add: No.1369 Chengnan Road, Nanhu, Jiaxing, Zhejiang, 314001, China
Tel: [phone] Fax: [phone]
Email:[e-mail] Web:www.eastrongroup.com
Dimensions
3
Smart Mini Power,One Module
17.5mm
35mm
62mm
Height
Width
Depth
119mm
17.5mm
62mm
Performance criteria
Operating humidity
Storage humidity
Operating temperature
Storage temperature
Reference temperature
Warm up time
International standard
Accuracy
Protection against penetration
of dust and water
Mechanical Environment
Insulating encased meter of
Protective class
≤ 90%
≤ 95%
-25°C - +55°C
-40°C - +70°C
23°C±2°C
3s
IEC 62053-21/ EN 50470-1/ 3
Class 1 / Class B
Ip51
M1
II
Specications(120Modbus)
Nominal voltage(Un)
Operational voltage
Insulation capabilities
- AC voltage withstand
- Impulse voltage withstand
Basic current (Ib)
Maximum rated current (Imax)
Starting current
Over current withstand
Operational frequency range
Internal power consumption
Pulse Output
Display LCD with backlit
Max.Reading 99999.9kWh
230V
176/276V
4KV for 1 minute
6KV-1.2µS
5A
45A
0.4% Ib
30Imax for 0.01s
50Hz(MID)
50/60Hz
≤ 2W/10VA
1000imp/kWh(default)
100/10/1 imp/kWh/kVarh
(congurable)
Specications(120CT-MV)
Nominal voltage(Un)
Operational voltage
Insulation capabilities
- AC voltage withstand
- Impulse voltage withstand
Primary Current
Secondary current input
Starting current
Over current withstand
Operational frequency range
Internal power consumption
Pulse Output
Display LCD with backlit
Max.Reading 99999.9kWh
230V
176/276V
4KV for 1 minute
6KV-1.2µS
5-9999A(depend on the CTs)
100MV
0.4% Ib
30Imax for 0.01s
50Hz(MID)
50/60Hz
≤ 2W/10VA
1000imp/kWh(default)
0.001(default) /0.01/0.1/1/10/
100/1000 kWh/kVarh (congurable)

1
1-1
Total active energy(kWh)
Display format:0000.00→9999.99
→10000.0→99999.9→0000.00
Import active energy(kWh)
Display format:0000.00→9999.99
→10000.0→99999.9→0000.00
Export active energy(kWh)
Display format:0000.00→9999.99
→10000.0→99999.9→0000.00
1-2
2Voltage (V)
3Current (A)
4Active power (W)
5Frequency (F)
6
7
Power factor (PF)
8
9
Modbus Adress ( ID)
Default: 001
Baudrate
Default : 2400bps
Parity
None/Even/Odd are optional
Default: none
7
6
1
2
Full Screen
It will last for 3 seconds.
Software version
It will last for 3 seconds.
Operation 8
Wiring diagram (SDM120Modbus)
JIAXING EASTRON ELECTRONIC INSTRUMENTS CO., LTD.
Add: No.1369 Chengnan Road, Nanhu, Jiaxing, Zhejiang, 314001, China
Tel: [phone] Fax: [phone]
Email:[e-mail] Web:www.eastrongroup.com
5
Output
Pulse Output
SDM120Modbus and SDM120CT-MV have two pulse outputs. Both pulse outputs are
passive type.
Pulse output 1 is congurable. The pulse output can be set to generate pulses to repr-
esent total / import/export kWh or kVarh.
(SDM120Modbus)The pulse constant can be set to generate 1 pulse per:
0.001(default) /0.01/0.1/1kWh/kVarh.
(SDM120CT-MV)The pulse constant can be set to generate 1 pulse per:
0.001(default) /0.01/0.1/1/10/100/1000 kWh/kVarh (congurable).
Pulse width: 200/100/60ms
Pulse output 2 is non-congurable. It is xed up with total kWh. The
constant is 1000imp/kWh.
RS485 output for Modbus RTU
The meter provides a RS485 port for remote communication. Modbus
RTU is the protocol applied. For Modbus RTU, the following RS485
communication parameters can be congured from the Set-up menu.
Baud rate: 1200, 2400, 4800, 9600
Parity: NONE/EVEN/ODD
Stop bits: 1 or 2
Modbus Address: 1 to 247
Initialization Display
When it is powered on, the meter will initialize and do self-checking.
After the self-checking program, the meter display will show the total
active energy (kWh)
Scroll Display by button
There is a button on the front of the meter. 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, he needs to press the scroll button on the front panel.
Click the button, the LCD display will scroll the
measurements.
Keep pressing the button for 3 seconds, the meter
will get into set-up mode.
Set-up Mode
To get into Set-up Mode, the user need keep pressing the button for 3 seconds, the
meter LCD will shows “-SET-“.
The user can program the meter parameters by sending correct command via RS485 port.
Please contact with the supplier for "Eastron SDM120-Modbus protocol or Eastron
SDM120CT-MV protocol”.
10
G B A
Terminal 1: L-in
Terminal 2: L-out
Terminals 3 & 4: Neutral wire
Terminals 5 & 6 & 7: Pulse output
Terminals 8 & 9 & 10:RS485 (G B A)
Installation Diagram
35mm
DIN Rail
10
Ct1
Primary current 5A (Default)
(only SDM120CT-MV have)
Wiring diagram (SDM120CT-MV)
9
Terminal 1: L-in
Terminal 2: L-out
Terminals 3 & 4: Neutral wire
Terminals 5 & 6 & 7: Pulse output
Terminals 8 & 9 & 10:RS485 (G B A)
G B A
P1
S2