M-Bus to Modbus Converter - MMCR-64
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M-Bus to Modbus Converter - MMCR-64 is a microprocessor two-way full-duplex M-Bus to Modbus converter, with the ability to supply 64 or 128 M-Bus slave devices.
It has both Modbus RTU and Modbus TCP interfaces, which can work independently of each other. It is intended for use in housing constructions and industrial buildings, mainly for distant reading of tax instruments or different types of sensors. Since Modbus has very wide usage and M-bus is a “special” protocol, BMS engineers often have difficulties embedding these two protocols in one system. This is where our converter takes place – being a smart bridge between two industrial protocols. The device is protected from short circuits in the output. Mounting of the unit is done on a standard М36 DIN rail.
Technical Features
| nominal output m-bus voltage (mark) | 35.5 VDC ± 0.5 V |
| maximum count of m-bus slave devices | 64 or 128 |
| maximal output current for m-bus interface | 140mA/280mA |
| output m-bus voltage in condition ‘0’ (space) | 22 ÷ 25 VDC |
| maximum m-bus baud rate | 4800bps |
| maximum RS-485/modBus baud rate | 115200bps |
| maximum devices in RS-485 network | 250 |
| maximum devices in ModBus register Map | 64/128 |
| power supply | 150-250 VAC (200-350 VDC) |
| power consumption | < 7 W for 64 slaves; < 12 W for 128 slaves |
| humidity | 40 ÷ 90 % |
| work temperature | from -20° C to +55° C |
| storage temperature | from -50° C to +90° C |
| longest distance in the m-bus network with one MMCR | 600m |
| display | 6 indicating leds (on, protection, output voltage, over range, collision, receiving) |
| dimensions (HxWxD), mm | 105/107/74 mm |
| protection class | IP30 |
| weight | 430 g |