User manual

4-6 Chapter 4: Appendix B: Connectors/Pinouts
Echo User's Manual, ver. 0.00
Table 7: DB-9 pinouts - Echo I/O Box
Pin No.
RS-232
Signal
RS-485
Signal
1 DCD RxD B(+)
2 RxD TxD B(+)
3 TxD TxD A(-)
4 DTR RxD A(-)
5 SG SR
6 Reserved CTS A(-)
7 RTS RTS A(-)
8 CTS RTS B(+)
9 Reserved CTS B(+)
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 Echo
adapter.