Figure 6: Rs-485/422 Wiring Diagram (2 Wire) - Connect Tech JB0 User Manual

4-14 Chapter 4: Appendices – RS-485/422 Interface
Figure 6 describes a 2 wire cabling scheme between a port on the
Titan/cPCI adapter to a port on the RS-485/422 peripheral.

Figure 6: RS-485/422 wiring diagram (2 wire)

Technical Tip
The RS-485/422 electrical interface consists of a differential
signaling scheme. You should always connect the signals
with twisted pairs
Titan/cPCI User's Manual, ver. 0.00
Titan/cPCI adapter
RxD +
1
TxD +
3
TxD -
4
RxD -
2
RTS +
7
CTS +
8
RTS -
9
CTS -
6
SR
5
RS-485 peripheral
TxD +
RxD +
RxD -
TxD -
CTS +
RTS +
CTS -
RTS -
SR