2-Port RS422/485 Serial PCIe Card
3
TXD Control Selection Jumper: JP2 for S1, JP3 for S2
1.
Mode Settings:
JP4 (for S1)
JP7 (for S2)
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:
JP8 (for S1)
JP9(for S2)
Description
Termination Resistor Disabled
(Default)
O
N
O
FF
485-2W
485-4W
422
485-2W
485-4W
422
485-2W
485-4W
422
