Specifications

10 PCL-846/847 User's Manual
Card Configuration
The ports on the PCL-846/847 card have jumpers and DIP switches
which require configuration before the card is used. DIP switches set
the port I/O addresses and speed modes. Jumpers set the port IRQs.
Default Settings
The board is shipped with default settings. If you need to change
these settings, however, see the following sections. Otherwise, you
can simply install the card. Note that you will need to disable your
CPU card's on-board COM ports, if any, or set them to alternate
addresses / IRQs.
PCL-846/847 Default Configuration
Setting Default function
JP11 IRQ 12
Speed mode 1x
IRQ mode Share
Base address Address 300H
Vector address Interrupt 280H
Address mode Enhance
RS-422/485 Selection (JP3, JP5, JP7, JP9)
You can set each port individually for either RS-422 (the default) or
RS-485 operation. Jumper JP3 configures Port 1, JP5 configures Port
2, JP7 configures Port 3, and JP9 configures Port 4. The figure below
shows the jumper settings. See the layout drawings on pages 4 and 5
for help locating the jumpers.
485
1
1
RS-422/485
RS-422 (default)
422
485
422