Connect Tech DFlex-4/104, User Manual, Page: 71 / 82

Chapter 4: Appendix F - RS-485/422 Options 4-21
DFlex-4/104 User's Manual, ver. 0.04
RS-485/422 Cable Wiring
You can wire DFlex-4/104 adapters with the RS-485/422 option
in various ways to communicate with RS-485/422 peripherals.
This section will descibe a few examples of RS-485/422 cabling
schemes.
Figure 15
describes a 4 wire cabling scheme between a port on
the DFlex-4/104 adapter to a port on the RS-485/422 peripheral.
Figure 15: RS-485/422 wiring diagram (4 wire )
RTS +
RTS -
CTS +
CTS -
TxD +
TxD -
RxD +
RxD -
RxD + TxD +
RxD -
TxD -
RTS -
CTS -
RTS +
CTS +
SR
SR
DFlex-4/104 adapter RS-485 peripheral
2
3
4
5
6
7
8
9
1
Figure 16 describes a 2 wire cabling scheme between a port on
the DFlex-4/104 adapter to a port on the RS-485/422 peripheral.
Figure 16: RS-485/422 wiring diagram (2 wire )
RTS +
RTS -
CTS +
CTS -
TxD +
TxD -
RxD +
RxD -
RxD + TxD +
RxD - TxD -
RTS -
CTS -
RTS +
CTS +
SR SR
DFlex-4/104 adapter RS-485 peripheral
1
2
3
4
5
6
7
8
9