4-Port RS422/485 Serial PCIe Card
3
Mode Selection Jumpers: JP1 (for S1~S4)
Termination Resistor Enable/Disable Jumpers: JP13~JP16 (for
S1~S4)
Echo or No Echo Selection Jumpers: JP3 (for S1~S4)
TXD Control Selection Jumpers: JP2 (for S1~S4)
1.
Mode Settings:
JP1 (for S1~S4)
Description
RS485 2-wire mode
(Default)
RS485 4-wire mode
RS422 mode
2.
Termination Resistor Enable/Disable:
This jumper
enables/disables the 120 Ohm termination resistor between
DATA+ and DATA- of the RS485 transceiver:
JP13~JP16 (for S1~S4)
Description
485-2W
485-4W
422
485-2W
485-4W
422
485-2W
485-4W
422
