Connect Tech Xtreme/104 User’s Manual
22 Revision 0.05
RS-422/485 Cable Wiring
Figure 9 depicts a 4 wire cabling scheme between a port on the Xtreme/104 adapter to a port on
the RS-422/485 peripheral.
Figure 9: RS-422/485 wiring diagram (4 wire)
RTS +
RTS -
CTS +
CTS -
TxD +
TxD -
RxD +
RxD -
RxD +
TxD +
RxD -
TxD -
RTS -
CTS -
RTS +
CTS +
SR
SR
Xtreme/104 adapter
RS-422/485 peripheral
3
4
2
5
6
9
7
8
1
Figure 10 depicts a 2 wire cabling scheme between a port on the Xtreme/104 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
Xtreme/104 adapter
RS-422/485 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