29
UMG 96RM
Correct
Incorrect
RS485 interface
The RS485 interface is designed with the UMG 96RM
as a 2-pole plug contact and communicates via the
Modbus RTU protocol (also see programming para-
meters).
Terminating resistors
The cable is terminated with resistors (120 ohm 1/4 W)
at the beginning and end of a segment.
The UMG 96RM has no terminating resistors.
Terminal block in the switch cabinet.
Device with RS485 interface.
(without a terminating resistor)
Device with RS485 interface.
(with terminating resistor on the device)
RS485 interface,
2-pole plug contact
A
B
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