Documentation Number 3PCIO1-0903 Manual
Appendix B
B -1
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
Appendix B:
CONNECTOR PINOUTS
Table B.1: RS-232 Pinouts
Table B.2: RS-232 DB9 to DB25 Conversion Cable
Name
DB9 Pin
(DTE)
DB25 Pin
(DTE)
DCD
1
8
RD
2
3
TD
3
2
DTR
4
20
GND
5
7
DSR
6
6
RTS
7
4
CTS
8
5
RI
9
22
Chassis
GND
Shield
(DB9
Shell)
1
Name
Description
Direction
(DTE)
DB9M
Pin
DCD
Data Carrier Detect
Input
1
RD
Receive Data
Input
2
TD
Transmit Data
Output
3
DTR
Data Terminal Ready
Output
4
GND
Signal Ground
------
5
DSR
Data Set Ready
Input
6
RTS
Request to Send
Output
7
CTS
Clear to Send
Input
8
RI
Ring Indicator
Input
9
