Cable Termination At Interface - MICRO-EPSILON IF2030/ENETIP Operating Instructions Manual

Installation and Assembly
4.2.4
i
We recommend a 120 Ohm terminating resistor between the signal lines at both the bus start and end.
IF2030/ENETIP works as a master for both interfaces; internally, a 120 Ohm terminating resistor has already
been permanently incorporated. The IF2030/ENETIP should be at the bus start.
IF2030
Fig. 8 Cable termination RS485,
n = max. 16 slaves
IF2030/ENETIP

Cable Termination at Interface

Ensure correct cable termination for an RS485 bus or RS422 bus!
A
120
Ohm
B
120
Ohm
Slave n
Slave n-1
Fig. 9 Cable termination RS422
RX+
120
Ohm
RX -
TX -
120
Ohm
TX+
IF2030
120
Ohm
120
Ohm
Slave 1
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