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