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Documentation Number 3PCIOSD1x-3903m Manual Appendix C C-1
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
Appendix C: Jumper Mode Table
Jumpers
Port 1 (A)
RS-232 RS-422
4-Wire
RS-485
4-Wire
RS-485
2-Wire
JP1
Control
RTS(232) not used SD/RTS * SD/RTS *
JP2 A 232 422/485 422/485 422/485
JP2 B 232 422/485 422/485 422/485
JP2 C 232 422/485 422/485 422/485
JP3 D 232 422/485 422/485 422/485
JP4 TX not used 422 485 485
JP4 RX not used 422 422 485
JP4
Termination
not used IN/OUT IN/OUT IN/OUT
JP3
Clock
*4/*1 *4/*1 *4/*1 *4/*1
How to Use the Table: The left vertical column shows the jumpers
for the port. The four right vertical columns show the position setting
of the jumper at the left for RS-232, RS-422 or 4-wire RS-485 or 2-
wire RS-485 modes.
NOTES:
RS-485 Mode: The JP1 Control jumper should be set to Send Data
mode unless your software requires RTS control.
Refer to the Setup section for explanations of the SD/RTS,
Termination and Clock settings.
Note that termination should only be used in systems with both high
baud rates (>19200) and over several thousand feet of cable.
Information on RS-422 and RS-485 communications can be found in
the B&B Electronics RS-422/485 Application Note (available free
on our websites).
C-2 Appendix C Documentation Number 3PCIOSD13903m 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