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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

T

his 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: +86-573-83698881 /83698882             Fax: +86-573-83698883
Email:[email protected]                 Web:www.eastrongroup.com

Dimensions

3

Smart Mini Power,One Module 

17

.

5m

m

35mm

6

2

m

m

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)

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