MB-CR-64 is microcontroller-based bidirectional M-BUS Master converting M-Bus signal to Modbus RS-485 RTU and or Modbus TCP.

It can supply power to maximum of 64 m-bus slave devices. MB-CR-64 is used as a bridge in building and industrial networks where it is needed to read m-bus devices (tax meters and/or sensors) in Modbus based SCADA systems. It has output short circuit protection on m-bus side.

It is mounted on standard M36 DIN rail.


Max. number of M-BUS slave devices64
Nominal output voltage (mark)35,5 VDC ± 1 V
Power supply voltage165-235 VAC (210-270 VDC)
Ambient temperature, operating-20 ÷ +50°C
Dimensions (H/W/D)105/107/74 mm
IP protection classIP20
RS-485 RTU Modbus interface baud rate300, 1.2K, 2.4K, 4.8K, 9.6K, 19.2K, 38.4K bps
TCP Modbus DHCPyes, can be turned on or off
M-BUS cable length, max.600 metros
Distance between MMCR and farthest M-BUS slave300 metros


Example of installation