B&B Electronics 485DSS manual RS-485/422, Device Direction Terminal Blocks

Chart 4. RS-232 DCE Device w/DB9 Connector to

485DSS RS-232 (DTE) Port

RS-232 DCE			485DSS
Serial Port		Signal	RS-232 (DTE) Port
DB9 Connector	Direction		DB25 Connector
2	-----------	>	3
3	<-----------		2
5	<---------	>	7
7	<-----------		4
8	-----------	>	5

Chart 5. RS-422/485 4-Wire Device to 485DSS RS-422/485 Port.

RS-422/485			485DSS
4-Wire		Signal	RS-485/422
Device	Direction		Terminal Blocks
TD (A)(-)	-----------	>	RD (A)
TD (B)(+)	-----------	>	RD (B)
Signal Ground	<----------	>	GND
RD (A)(-)	<-----------		TD (A)
RD (B)(+)	<-----------		TD (B)

Chart 6. RS-485 2-Wire Device to 485DSS RS-485/422 Port.

RS-485			485DSS
2-Wire		Signal	RS-485/422
Device	Direction		Terminal Blocks
Data (A)(-)	<----------	>	TD (A) & RD(A)
Data (B)(+)	<----------	>	TD (B) & RD(B)
Signal Ground	<----------	>	GND

C-2 Appendix C 485DS-0308 Manual

B&B Electronics Mfg Co Inc – 707 Dayton Rd - PO Box 1040 - Ottawa IL 61350 - Ph 815-433-5100 - Fax 815-433-5104 B&B Electronics – Westlink Commercial Park – Oranmore, Galway, Ireland – Ph +353 91 792444 – Fax +353 91 792445