Appendix C: Adaptors; Table C.1: Rs-422 Cat 5 Adaptor Pin Assignments; Table C.2: Rs-485 Cat 5 Adaptor Pin Assignments - Avocent ESP Serial Hub Installer/User Manual

Appendix C: Adaptors

Avocent offers a variety of adaptors. Contact Technical Support for more information.
RS-422 CAT 5 adaptor
Table C.1 lists the pin assignments for the RS-422 CAT 5 adaptor, which enables use of standard
CAT 5 cable twisted pairs for RS-422 receive and transmit signals.

Table C.1: RS-422 CAT 5 Adaptor Pin Assignments

Pin Number - DB-9
1
2
3
4
5
6
7
8
9
RS-485 CAT 5 adaptor
Table C.2 lists the pin assignments for the RS-485 CAT 5 adaptor, which enables use of one of the
pairs of the standard CAT 5 cable twisted pairs for the RS-485 signal pair.

Table C.2: RS-485 CAT 5 Adaptor Pin Assignments

Pin Number - DB-9
1
2
3
4
5
6
7
RS-422
RxD (+)
RxD (-)
TxD (+)
TxD (-)
GND
DSR (RS-232)
RTS (RS-232)
CTS (RS-232)
N/C
RS-422
RxD (+)
RxD (-)
TxD (+)
TxD (-)
GND
DSR (RS-232)
RTS (RS-232) *
Description
Receive Data (pos)
Receive Data (neg)
Transmit Data (pos)
Transmit Data (neg)
Ground
Data Set Ready
Request to Send
Clear to Send
N/A
Description
Receive Data (pos)
Receive Data (neg)
Transmit Data (pos)
Transmit Data (neg)
Ground
Data Set Ready
Request to Send
Appendices 77
Pin Number - RJ-45
1
2
4
5
N/C
N/C
N/C
N/C
N/C
Pin Number - RJ-45
4
5
4
5
N/C
N/C
N/C