Connect Tech DFlex-4/104 - Manual (Page 54)

4-4 Chapter 4: Appendix B - Connectors/Pinouts
DFlex-4/104 User's Manual, ver. 0.04
Cable Connector Pinouts
You can order optional DB9 ribbon cables with the DFlex-4/104.
These cables attach to the 10 pin port headers on the board.
Table 5 shows the pinouts for the optional DFlex-4/104 male
DB9 cable connectors.
Table 5: DB-9 cable connector pinouts
Pin No. RS-232
Signal RS-485
Signal RS-423
Signal Current Loop
Signal
1 DCD RxD B(+) RxD(+) RxD(-)
2 RxD TxD B(+) TxD Ref TxD(+)
3 TxD TxD A(-) TxD(-) TxD Source
4 DTR RxD A(-) RxD(-) TxD Return
5 SG SR SR SG
6 N/C CTS A(-) CTS(-) RxD Return
7 RTS RTS A(-) RTS(-) TxD(-)
8 CTS RTS B(+) RTS Ref RxD(+)
9 N/C CTS B(+) CTS(+) RxD Source
Male DB-9 Connector
1 5
6 9
Technical Tip:
Please ensure that you terminate the DCD or CTS signals if your
application does not use them. The common way to do this is to
connect DCD to DTR and/or to connect CTS to RTS. Failure to
do so may result in a loss of a performance on your DFlex-4/104
adapter.