How To Use; Mode Settings - StarTech.com PCI2S232485I Instruction Manual

How to Use

DB9 male
connectors

Mode Settings

There are two jumpers for each port that are used to set its operation mode. JP1/JP2 for Port 1 (S1) and
JP4/JP5 for Port 2 (S2).
JP2 (for S1 port) / JP5 (for S2 port)
JP1, JP2 jumpers
JP4, JP5 jumpers
JP1 (for S1 port) / JP4 (for S2 port)
3
Description
RS485 - 2-wire
(Default)
RS485 4-wire
RS422
RS232