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10
Pin Assignment
This chapter provides the pin assignments for SUNIX Universal PCI
RS-422/485 Multi-Port Communication Board, as well as the pin assignments for
the optional accessories.
RS-422 or 4-Wire RS-485
PIN DB9M DB25M Pin Header
Tx+ 2 3 3
Tx- 1 8 1
Rx+ 3 2 5
Rx- 4 20 7
GND 5 7 9
2-Wire RS-485
PIN DB9M DB25M Pin Header
Tx+ 2 3 3
Tx- 1 8 1
GND 5 7 9
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