B&B Electronics 8 PORT SMART SWITCH CE 232D4SS8 - Manual (Page 27)

B-4 Appendix B 232D4SS84502 Manual
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 7. IBM PC DB25 Connector to Ports A - H (DTE)
Master port configured as a DTE port with a modem
connected (see Chart 3).
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 <----------- 20
20 -----------> 6*
* Pins 6 & 8 are tied together inside the 232D4SS8 and share the
same input.
Chart 8. IBM PC DB9 Connector to Ports A - H (DTE)
Master port configured as a DTE port
with a modem connected (see Chart 3).
IBM PC
Serial Port
DB9 Connector
Signal
Direction
232D4SS8
Ports A - H (DTE)
DB25 Connector
3 -----------> 3
2 <----------- 2
7 -----------> 5
8 <----------- 4
6 <---- ----> 6*
5 <---------> 7
1 <----------- 20
4 -----------> 6*
* Pins 6 & 8 are tied together inside the 232D4SS8 and share
the same input.