Product name:MSM75SF

Application                               MSM75SF

     The MSM75SF series multimeter is DIN rail single phase multi-rate electronic energy meters. MSM75SF series multimeter  adopt many advanced technologies of research and development, like microelectronic-techniques, specialized large-scale IC (integrated circuit), digital sampling and processing technology, SMT technique, and so on. Their technical performances for MSM75SF series multimeter completely conform to International Standards IEC 62053-21 for Class 1 single phase active energy meter. MSM75SF series multimeter can directly and accurately measure the load active energy consumption in the single phase AC networks of rated frequency 50Hz or 60Hz. The MSM75SF series multimeter have multiple configurations for option, to be suitable with the various market demands. MSM75SF series multimeter have features with excellent long-term reliability, small volume, light weight, perfect appearance, easy installation, etc. This meter has already got the patent certificate from China State Intellectual Property Office at present. Patent certificate NO. ZL2012 3 0520871.8, any other country patent certificate are in assessing.


Functions and features

v MSM75SF series multimeter; Available as35mmDIN standard rail mounted, conforming to Standards DIN EN 50022, as well as front PANEL mounted (the center distance between two mounting holes is63mm). Two mounted methods above are optional for user.

v MSM75SF series multimeter; 6 pole width (modulus12.5mm), complying with Standards JB/T7121-1993.

v MSM75SF series multimeter; Can select time-of-use metering in 3 tariffs. Can set 12 daily intervals. Can freely set the date in every month to read meter automatically. Can set single tariff at weekends.

v MSM75SF series multimeter; Can select 2 tariffs metering, equipped with the tariff setting port, if the input control voltage is 0 - 90 Vac, the setting tariff is F1. If the input control voltage is 150 - 400 Vac, the setting tariff is F2. Tariff transduction is controlled by the external timer or similar device.

v MSM75SF series multimeter; The meter with time-of-use metering in 3 tariffs has clock chip inside and maintenance free lithium battery inside. The battery capacity can be detected in real time and displayed, keeping the data for 12 months.

v MSM75SF series multimeter; 7 digits LCD with two options: cycle display (default) or push-bottom display item by item. Can set the cycle display interval. Can select the data item of display. The decimal of the data display can be set to be 1 or 2 digits.

v MSM75SF series multimeter; Can select the inside far infrared data communication port and RS485 data communication port for meter setting or reading meter. The meter setting has password protection. The communication protocol complies with Standards DL/T645-1997 and MODBUS-DRT, can also select the other communication protocol.

v MSM75SF series multimeter; S-connection (inlet wire from bottom and outlet wire on top) and direct connection.

v MSM75SF series multimeter; Equipped with a polarity passive energy impulse output terminal, conforming to Standards IEC 62053-31 and DIN 43864.

v MSM75SF series multimeter; LEDs indicate separately the power state, the energy impulse signal, load current flow direction, current tariff state and data communication state.

v MSM75SF series multimeter; Measure the active energy consumption in one direction on single phase two wire, which is not related with the load current flow direction at all, complying with Standards IEC 62053-21.

v MSM75SF series multimeter; The short terminal cover is made with the transparent PC, to reduce the installation space and is convenient for centralized installation.

Technical parameters




voltage (V)


specifications (A)


current (A)




Class 1

127 or 230

5(30)   10(60)

5(100)  20(100)




AC voltage 4kV for 1 minute, 1.2/50us waveform impulse voltage 6kV.

Outer and mount dimension

Wiring diagram -1 (Type S)

(Inlet wire from bottom, outlet wire on top)





Phase line


Neutral Wire

3 and 4

Passive energy impulse output port

1 and 2

RS485 communication port



David Chang
Managing Director
Morning Sun Electric Co.,Ltd
Add:No.358,Liujiang rd,,liushi town,yueqing city,zhejiang province,China