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232D4SS84502 Manual Appendix B B-3
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
Chart 5. IBM PC DB25 Connector to Ports A - H (DTE)
Master port configured as a DCE port.
IBM PC
Serial Port
DB25 Connector
Signal
Direction
232D4SS8
Ports A - H (DTE)
DB25 Connector
2 -----------> 3
3 <----------- 2
4 -----------> 5
5 <---------- 4
6 <---------- 6*
7 <---------> 7
8 <----------- 8*
20 -----------> 20
* Pins are tied together inside the 232D4SS8 and share the same
input.
Chart 6. IBM PC DB9 Connector to Ports A - H (DTE)
Master port configured as a DCE port.
IBM PC
Serial Port
DB9 Connector
Signal
Direction
232D4SS8
Ports A - H (DTE)
DB25 Connector
2 <----------- 2
3 -----------> 3
4 -----------> 6*
5 <---------> 7
6 <----------- 20
7 -----------> 5
8 <----------- 4
* Pins 6 & 8 are tied together inside the 232D4SS8 and share
the same input.