Serial Products Installation Procedures

Installing AT-232/485 Boards under Windows NT

If you have not already done so, enable ISA Plug-n-Play by following these steps.

Before installing the hardware, complete the following steps to install the NI Serial software for Windows NT. Installing the NI Serial Software.

NOTE: If you are installing an AT RS-485 you may need to adjust the value of the bias resistors, depending on your application. More information.

Follow these steps to install an AT serial board:

1. Turn off your computer. Keep the computer plugged in so that it remains grounded while you install the AT serial board.
2. Remove the top or side cover of the computer.
3. Remove the expansion slot cover on the back of the computer.
4. Insert the AT serial board into an unused slot with the serial connectors sticking out of the opening on the back panel. Make sure that you insert the board all the way into the slot. The board may seem to click firmly into place, even though it is only part of the way in. The figure below shows the installation of an AT serial board:

   

   
   
5. Screw the mounting bracket of the AT serial board to the back panel rail of the computer.
6. Replace the cover, and turn on your computer.
7. Windows NT displays one or more New Hardware Found dialog boxes, depending on your serial hardware. In each dialog box, make sure that Windows Default Driver is selected, and click on OK.
8. The serial configuration software displays a PnP Port Configuration dialog box. Select a nonconflicting base I/O address and IRQ setting for the port/card, and click on OK.
9. After you have selected the resources for all ports, choose to restart the computer when the system prompts you.

Your serial hardware is now installed.

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