Specifications

8 PCL-846 User's Manual

Card Configuration

The ports on the PCL-846 card have jumpers and DIP switches which

requir e conf igur ation bef ore the car d is used . DIP s witc hes 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 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.

485485

485



RS-422/485

RS-422 (default)

422422

422

485485

485

422422

422