B&B Electronics 232D4SS8 manual Chart 7. IBM PC DB25 Connector to Ports a H DTE

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			232D4SS8
Serial Port		Signal	Ports A - H (DTE)
DB25 Connector	Direction		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			232D4SS8
Serial Port		Signal	Ports A - H (DTE)
DB9 Connector	Direction		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.

B-4 Appendix B 232D4SS84502 Manual

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