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RS-232 protocol converter

FOB Price: 585.00 EUR/Unit
In Stock
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Quick Details

  • Brand Name: Mbus
  • Model Number: 400


The mBus 400 is a transparent converter from RS232 to M-Bus interface. You can connect 4 RS232 signal lines - RxD, TxD, CTS, RTS.

The converter operates as a M-Bus Master and allows you to power (connect) up to 400 standard M-Bus receivers (so called M-Bus Slaves) through M-Bus Master output. You can connect fewer devices at a higher M-Bus load over long distances. You can use mBus with any devices equipped with M-Bus interface, e.g. heat meters, electricity meters, gas meters, executive modules, recorders, measuring instruments.

The converter has LEDs indicating data transmission: transmission (TxD), reception (RxD), overload on M-Bus (ERROR), M-Bus ready (READY), power supply (POWER). Connection interfaces are made of screw connection terminal blocks. DIN rail mountable plastic housing (TS35)


  • RS232 to M-Bus level conversion
  • Maximum 400 M-Bus slaves
  • Baud Rate: 300 to 19200 bps
  • RS232 – M-Bus opto-isolation
  • Over-current and short-circuit protection on the M-Bus
  • LED display for Tx, Rx, power, error, ready
  • Power supply: 20 ~ 35 Vdc or 20 ~ 24 Vac.
  • DIN rail mounting




Transparent conversion from RS232 to M-Bus master

LED Indicators: Tx, Rx, power, error, ready


Baud Rate

300 ~ 19200 bps




M+, M- configuration

Maximum M-Bus receivers

400 (MBus slave)

Surge Protection / Over Voltage Protection M-Bus Interface

43V 600W/1ms

Opto Isolation

RS232~MBus – 100 V AC/DC. 
RS232~Power Supply – 100 V AC/DC. 
Power supply~MBus – 100 V AC/DC

Operating Conditions

Power Input

20 ~ 35 Vdc, 20 ~ 24 Vac. Maximum power consumption: 12W

Operating temperature

0 ~ 60°C

Storage temperature

-20 ~ 85°C


5 ~ 95%RH (without condensation)


105x90,5x60,2 mm (width x depth x hight)



Many of industrial devices are equipped with RS-232 interface, like the iMod telemetry platform:

iMod is a GPRS Telemetry Module with additional application logic on demand - NEW iMod series devices. This is innovative powerful and open Linux based platform for any telemetry application. Functionality as ModBus Gateway/RouterData LoggingSMS/email notificationweb interfaceand many more.

Main functions of iMod are:

  • downloading data from NPE interfaces or outside devices using the Modbus, mBus, or other protocols
  • buffering the gathered data with the option of its archiving - Data Logger
  • giving monitoring systems (i.e. SCADA type) or other iMod or PLC drivers access to the data

iMod supports iModCloud.

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