RS485 interface
In UMG 96RM-E, the RS485 interface is designed as a 2
pin plug contact, which communicates via the Modbus
RTU protocol (also see Parameter programming).
Correct
Incorrect
Termination resistors
The cable is terminated with resistors (120Ohm, 1/4W)
at the beginning and at the end of a segment.
The UMG 96RM-E does not contain any termination
resistors.
Terminal strip in the cabinet.
Device with RS485 interface.
(without terminating resistor)
Device with RS485 interface.
(with terminating resistor on the device)
RS485 interface,
2-pole plug contact
RS485 interface,
2-pole plug contact
with terminating resistor
(Item no. 52.00.008)
A
B
120 Ω
RS485 bus
A
B
RS485 bus
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