M-bus universal converter MBU-250

Main m-bus convertor MBU-250

MBU-250 is a full-duplex M-bus converter with several interfaces. It can supply up to 250 m-bus slave devices and has RS-232, RS-485 and USB interfaces. It also has m-bus slave input and can be used as an m-bus repater in larger networks. MBU-250 is intended for use in housing constructions and industrial buildings mainly for distance reading of tax instruments or different types of sensors. It is protected for short circuit in the output. Mounting of the unit is done on a standard М36 DIN-rail.

user manual

Main technical parameters of MBU-250

nominal output voltage (mark) 35.5 VDC ± 1 V
maximum count of slave devices 250
input interfaces RS-232, RS-485, USB, m-bus input
maximal output current 410 ± 5mA
output voltage in condition ‘0’ (space) 22 ÷ 25 VDC
power supply 165-235 VAC (210-270 VDC)
power consumption < 21 W
maximum baud rate 9600bps
humidity 40 ÷ 90 %
work temperature from -20° C to +55° C
storage temperature from -50° C to +90° C
longest distance in the network with one MBU-250 600m
display 6 indicating leds (On, protection, output voltage, over range, collision, communication)
dimensions (HxWxD), mm 105/130/71 mm
protection class IP20
weight 285 g

Operation of MBU-250

Mounting and electrical wiring