Connect Tech JB2, JB0, JB1 Appendices - RS-485/422 Interface, Technical Tip, Titan/cPCI adapter

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)

Titan/cPCI adapter RS-485 peripheral

1	RxD +	TxD +
3	TxD +	RxD +
4	TxD -	RxD -
2	RxD -	TxD -
7	RTS +	CTS +
8	CTS +	RTS +
9	RTS -	CTS -
6	CTS -	RTS -
5	SR	SR

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