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.