
RS-232/RS-422/485 Option 25
RS-422/485 Cable Wiring
Figure 4 describes a 4 wire cabling scheme between a port on the
Xtreme/104 Opto adapter to a port on the RS-422/485 peripheral.
Figure 4: RS-422/485 wiring diagram (4 wire)
RTS +
RTS -
CTS +
CTS -
TxD +
TxD -
RxD +
RxD -
RxD +
TxD +
RxD -
TxD -
RTS -
CTS -
RTS +
CTS +
SR
SR
Xtreme/104 Opto adapter
RS-485/422 peripheral
3
4
2
5
6
9
7
8
1
Figure 5 describes a 2 wire cabling scheme between a port on the
treme/104 Opto adapter to a port on the RS-422/485 peripheral. X
Figure 5: RS-422/485 wiring diagram (2 wire)
RTS +
RTS -
CTS +
CTS -
TxD +
TxD -
RxD +
RxD -
RxD +
TxD +
RxD -
TxD -
RTS -
CTS -
RTS +
CTS +
SR
SR
Xtreme/104 Opto adapter
RS-485/422 peripheral
3
1
4
2
5
6
9
7
8
Technical Tips:
1. The RS-422/485 electrical interface consists of a differential
signaling scheme. You should always connect the signals with
twisted pairs.
2. Signal reference must be connected.
Xtreme/104 Opto User's Manual, ver. 0.03
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