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  • SDM120CT-Modbus ( 5A) MID

    • Measures kWh, Kvarh, KW, Kvar, KVA, PF, Hz, dmd, V, A, etc.
    • Bi-directional measurement IMP & EXP
    • Two pulse outputs
    • RS485 Port modbus RTU
    • 17.5 mm width 1 modual
    • CT operated
    • Class 1.0 accuracy
    • Din rail Mounted

    • Description
    • Diagram
    • Manual Download


    The energy-meters “with a white back-lighted LCD screen for prefect reading” are used to measure single-phase like residential, utility and Industrial application. The unit measures and displays various important electrical parameters, and provide a RS485 communication port for remote reading and monitoring. Bi-directional energy measurement makes the unit a good choice for solar PV energy metering. The compact design and din rail installation provides a easy and economical solution for your metering demand.


    General Specifications

    Voltage AC (Un)                              230V

    Voltage Range                                176~276V AC

    Base Current (Ib)                            0.1VAC

    Power consumption                         <2W/10VA

    Frequency                                      50/ 60Hz(±10%)

    AC voltage withstand                       4KV for 1 minute

    Impulse voltage withstand               6KV-1.2uS wavform

    Overcurrent withstand                     30Imax for 0.01s

    Pulse output 1                                1000imp/kWh (default)

    Pulse output 2                                0.001(default)/0.01/0.1/1/10/100/1000 kWh/kVarh (configurable)

    Display                                           LCD with white backlit

    Max. Reading                                  99999.9kWh



    Voltage                                           0.5% of range maximum

    Current                                           0.5% of nominal

    Frequency                                       0.2% of mid-frequency

    Power factor                                    1% of Unity

    Active power                                    1% of range maximum

    Reactive power                                 1% of range maximum

    Apparent power                                1% of range maximum

    Active energy                                    Class 1 IEC62053-21

                                                           Class B EN50470-3

    Reactive energy                                 1% of range maximum




    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 2500m

    Warm up time                                               10s

    Installation category                                      CAT II

    Mechanical Environment                                 M1

    Electromagnetic environment                          E2

    Degree of pollution                                          2



    Pulse Output

    The meter provides two pulse outputs. Both pulse outputs are passive type.

    Pulse output 1 is configurable. The pulse output can be set to generate pulses to represent total /import/ export kWh or kVarh.

    The pulse constant can be set to generate 1 pulse per: 0.001(default) /0.01/0.1/1/10/100/1000 kWh/kVarh.

    Pulse width: 200/100/60ms

    Pulse output 2 is non-configurable. It is fixed 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 configured by the Modbus command.

    Baud rate: 1200, 2400, 4800, 9600

    Parity: NONE/EVEN/ODD

    Stop bits: 1 or 2

    Modbus Address: 1 to 247



    Din rail dimensions                                               17.5x119x62 (WxHxD) DIN 43880

    Mounting                                                                DIN rail 35mm

    Sealing                                                                       IP51 (indoor)

    Material                                                                   self-extinguishing UL94V-0