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Documentation Number 232BSS42907 Manual Appendix B: Cable Charts B-3
B&B Electronics Mfg Co Inc – 707 Dayton Rd - PO Box 1040 - Ottawa IL 61350 - Ph 815-433-5100 - Fax [phone]
B&B Electronics Ltd – Westlink Commercial Park – Oranmore, Galway, Ireland – Ph [phone] – Fax [phone]
Chart B.3. DCE (Modem) DB25 Connector to Master Port
DCE (Modem)
Serial Port
DB25 Connector
Signal
Direction
232BSS4
Master Port (DCE)
DB25 Connector
2 <----------- 3
(RD)
3 -----------> 2
(TD)
4 <----------- 5
(CTS)
5 -----------> 4
(RTS)
6 -----------> 20
(DTR) *
7 <---------> 7
(GND)
20 <----------- 6
(DSR) *
• - Pins 6, 8, & 20 looped back internally on the
232BSS4
Chart B.4. DCE (Modem) DB9 Connector to Master Port
DCE (Modem)
Serial Port
DB9 Connector
Signal
Direction
232BSS4
Master Port (DCE)
DB25 Connector
2 -----------> 2
(TD)
3 <----------- 3
(RD)
4 <----------- 6
(DSR) *
5 <---------> 7
(GND)
6 -----------> 20
(DTR) *
7 <----------- 5
(CTS)
8 -----------> 4
(RTS)