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