MICRO-EPSILON IF2030/ENETIP - Cable Termination at Interface

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Installation and Assembly
IF2030/ENETIP
4.2.4 Cable Termination at Interface
i
Ensure correct cable termination for an RS485 bus or RS422 bus!
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.
A
B
IF2030 Slave n
Slave n-1
120
Ohm
120
Ohm
RX+
RX -
IF2030 Slave 1
120
Ohm
120
Ohm
TX -
TX+
120
Ohm
120
Ohm
Fig. 8 Cable termination RS485,
n = max. 16 slaves
Fig. 9 Cable termination RS422