Specifications

232XSSD43800 Manual B-
5
B&B Electronics -- PO Box 1040 -- Ottawa, IL 61350
PH [phone] -- FAX [phone]
Chart 9. RS-422/485 4-Wire Device to Port (A - H) Configured as
an RS-422 /485 Port.
RS-422/485
4-Wire
Device
Signal
Direction
232XSSD4
Ports A - H
DB25 Connector
TD (A)* -----------> 17 - RD (A)
TD (B)* -----------> 16 - RD (B)
Signal Ground <----------> 7 - SG
RD (A)* <----------- 15 - TD (A)
RD (B)* <----------- 14 - TD (B)
* If the device being connected uses "+" and "-" in place of "B"
and "A", the "+" replaces the "B" and the "-" replaces the "A".
NOTE:
Make sure the port's set-up jumpers are in the proper
position for four-wire communications.
Chart 10. RS-485 2-Wire Device to Port (A - H) Configured as an
RS-485 Port.
RS-485
2-Wire
Device
Signal
Direction
232XSSD4
Ports A - H
DB25 Connector
Data (A)* <----------> 15 - TD (A)
Data (B)* <----------> 14 -TD (B)
Signal Ground <----------> 7 - SG
•
If the device being connected uses "+" and "-" in place of "B"
and "A", the "+" replaces the "B" and the "-" replaces the "A".
•
Place a jumper between the TD (A) and the RD (A) to make the
Data (A) line. Also place a jumper between TD (B) and RD (B) to
make the Data (B) line.
NOTE:
Make sure the port's set-up jumpers are in the proper
position for two-wire communications.