GW-7828 is a Modbus RTU Slave to M-Bus Master Gateway. The M-Bus (“Meter-Bus”) is a standard for remote reading of meters. It is usable for most types of consumption meters as well as for various sensors and actuators.


  • Supports M-Bus Standard: EN-13757, CJ/T -188
  • Supports Modbus RTU Function Code 0x03 and 0x04 to Read Meter data
  • Baud rate: Adjustable by Rotary Switch From 300 to 115200 bps
  • Supports up to 100 M-Bus Slaves
  • M-Bus Over Current Protection
  • Short-Circuit Protection on the M-Bus
  • Update Firmware From Serial Port
  • Provides PWR, MTX and MRX 3 LED Indicators
GW-7828     CR  Modbus RTU Slave to M-Bus Master Gateway (RoHS)