
Connect Tech Xtreme/104-Plus User’s Manual
Revision 0.04
20
RS-422/485 Wiring Examples
Figure 10: RS-422/485 Wiring Diagram (4 wire)
Figure 11: RS-422/485 Wiring Diagram (2 wire)
Notes:
The RS-422/485 electrical interface consists of a differential signaling scheme. You should
always connect the signals with twisted pairs. Signal reference must be connected.
RTS +
CTS +
RxD +
TxD +
TxD -
RTS -
CTS -
CTS +
SR
Xtreme/104-Plus Opto adapter
RS-485/422 peripheral
4
7
1
TxD +
TxD -
RS-485/422 peripheral
3
1
4
2
5
6
9
7
8
-Plus Opto adapter
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