B&B Electronics 3PCIOU4 - Manual - Manual (Page 51)

Connector Pinouts
Document Number 3PCI-0712m Appendix B B -1
A A p p p p e e n n d d i i x x B B : : C C O O N N N N E E C C T T O O R R P P I I N N O O U U T T S S
RS-232 Pinouts
Name Description Direction
(DTE)
DB-9M
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
Figure 27. RS-232 Signal Designations and DB-9 Pinout
Signal Name DB-9 Pin
(DTE)
DB-25 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 (DB-9
Shell)
1
Figure 28. RS-232 DB-9 to DB-25 Conversion Cable Pinout