Appendix B: Rs-232 & Rs-422/485 Pinouts - B&B Electronics 3PCIOSD2A Manual

Appendix B: RS-232 & RS-422/485 Pinouts
Name
DCD Data Carrier Detect
RD
TD
DTR Data Terminal Ready
GND
DSR
RTS
CTS
NC
Name
RD (A)
TD (B) +
TD (A)
GND
RD (B) +
With 2-wire RS-485 mode operation, your connection cable must
jumper TD(A) to RD(A) and TD(B) to RD(B). Connect from TD(A)
and TD(B) to the Data A( ) and Data B(+) wires of your RS-485
network.
Note that the EIA RS-422 Specification labels data lines with an "A"
and "B" designator. Some RS-422 equipment uses a " " and "+"
designator. In almost all cases, the "A" line is the equivalent of the
" " line and the "B" line is the equivalent of the "+" line. More
information on RS-422 communications can be found in B&B's free
RS-422/485 Application Note (available on our websites).
Documentation Number 3PCIOSD2x-3903 Manual
B&B Electronics Mfg Co – 707 Dayton Rd - PO Box 1040 - Ottawa IL 61350 - Ph 815-433-5100 - Fax 815-433-5104
B&B Electronics Ltd – Westlink Comm. Pk. – Oranmore, Galway, Ireland – Ph +353 91-792444 – Fax +353 91-792445
Description
Receive Data
Transmit Data
Signal Ground
Data Set Ready
Request to Send
Clear to Send
Not Connected
Table 1: RS-232 Pinouts
Description
Receive Data A
Transmit Data B
Transmit Data A
Signal Ground
Receive Data B
Table 2: RS-422/485 Pinouts
Direction DB9M
Pin
Input 1
Input 2
Output 3
Output 4
------ 5
Input 6
Output 7
Input 8
------ 9
Direction DB9M
Pin
Input
Output
Output
------
Input
Appendix B
1
2
3
5
9
B-1