Connect Tech Titan/cPCI - Manual (Page 34)

Titan/cPCI User’s Manual, Connect Tech Inc.
30 Revision 1.01
Figure 9 depicts a 2 wire cabling scheme between a port on the Titan/cPCI adapter to a port on
the RS-422/485 peripheral.
Figure 10: 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
Titan/cPCI adapter RS-485 peripheral
3
1
4
2
5
6
9
7
8
Technical Tip
The RS-422/485 electrical interface consists of a differential signaling
scheme. You should always connect the signals with twisted
pairs.