Lava Computer RS550 - Manual (Page 4)

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4. For Windows users: After you have configured the RS422-550
jumpers, you will need to go through the “Add New Hardware”
procedure in Windows Control Panel. Install the two ports on the
RS422-550 as Standard Communications Ports when prompted.
Please note that after completing the Add New Hardware
procedure, you will likely have to return to Control Panel, System,
Device Manager, and modify the settings in the Ports section by
changing the Basic Configuration to match your RS422-550
hardware jumper settings.
Note: To disable a port, remove the jumper from both the COM
the corresponding IRQ jumper configuration pins.
and
Connector Details
The pins of the DB-9 female
connectors on the RS422-550 serial
board are illustrated on the right.
Port A and B connectors have
identical pinouts.
5 4 3 2 1
6 7 8 9
TX RTS
GND
RX CTS