2S RS422/485 Mini PCIe Card
2
There are 2 sets of the jumpers to set the settings for port 1 (S1) and port
2 (S2) respectively.
Mode Selection Jumper:
JP1 for S1, JP2 for S2
Termination Resistor Enable/Disable Jumper:
JP3 for S1, JP4 for S2
1.
Mode Settings:
JP1 (for S1)
JP2 (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:
JP3 (for S1)
JP4(for S2)
Description
Termination Resistor Disabled
(Default)
O
N
O
F
F
3. Jumper Settings
485-2W
485-4W
422
485-2W
485-4W
422
485-2W
485-4W
422
