Janitza UMG 96RM-M 5222039 Data Sheet

29

The M-Bus interface is designed with the UMG 96RM-M 
as a  2-pole plug contact and communicates via the M-
Bus protocol.

The UMG 96RM-M loads the M-Bus with an M-Bus de-
vice load of 1.5 mA.

M-Bus interface, 
2-pole plug contact 

M+
M-

Twisted screened cable should be used for connections 
via the M-Bus interface.

•  Cable paths should be designed to be as short as 

possible.

•  Maintain as much distance as possible to power ca-

bles and to consumers (e.g. electrical motors, neon 
tubes, transformers).

•  In order to prevent cross currents in the bus, there 

should be no ground coupling, or a maximum of one 
instance of ground coupling.

•  Gather the cables mechanically above the earthing 

clamp in order to avoid damage due to cable move-
ments.

•  Use suitable cable glands to feed the cables into the 

cabinet - for example armoured conduit couplings.

2-pin connector with cable 
connection (

 

cable type: 2

 

x

 

0.75

 

mm

2

 

) via twin ferrules