B&B Electronics 232SS2 Manual page 24

Chart 5. IBM PC DB25 Connector to Ports A - D (DCE)
IBM PC
Serial Port
DB25 Connector
2
3
4
5
6
7
8
20
.
Chart 6. IBM PC DB9 Connector to Ports A - D (DTE)
IBM PC
Serial Port
DB9 Connector
1 & 6
2
3
4
5
7
8
232SS21600 Manual
B&B Electronics Mfg Co Inc – 707 Dayton Rd - PO Box 1040 - Ottawa IL 61350 - Ph 815-433-5100 - Fax 815-433-5104
Master port DTE, Slave ports DCE.
Straight Through Connection
Signal
Direction
----------->
<-----------
----------->
<-----------
<-----------
GROUND
<-----------
----------->
Master port DCE, Slave port DTE.
Null Modem Connection
Signal
Direction
<-----------
<-----------
----------->
----------->
GROUND
----------->
<-----------
232SS2
Ports A - D (DCE)
DB25 Connector
20
232SS2
Ports A – D (DTE)
DB25 Connector
6 & 8
Appendix C
2
3
4
5
6
7
8
20
2
3
7
5
4
C-3