National Instruments PC-DIO-24 - Manual (Page 18)

© National Instruments Corporation 2-1 PC-DIO-24 User Manual
Chapter 2
Configuration and Installation
This chapter describes how to configure and install the PC-DIO-24, including I/O connector
signal descriptions, handshake timing diagrams, and cabling instructions.
Board Configuration
The PC-DIO-24 contains one DIP switch and two jumpers to configure the base I/O address and
interrupts, respectively. The PC-DIO-24 also contains one fuse to protect the +5 V power
output. Figure 2-1 shows the location of jumper sets W1 and W2, DIP switch U2, and the
fuse F1.
The PC-DIO-24 is configured at the factory to a base I/O address of hex 210, to use interrupt
enable line PC4, and to use interrupt level 5. These settings (shown in Table 2-1) are suitable for
most systems. However, if your system has other hardware at this base I/O address, interrupt
enable line, or interrupt level, you need to change these settings on the PC-DIO-24 (as described
in the following pages) or on the other hardware. Record your settings in the PC-DIO-24
Hardware and Software Configuration Form in Appendix D, Customer Communication.
Table 2-1. PC-DIO-24 Factory-Set Jumper and Switch Settings
Base I/O Address Hex 210
(factory setting)
U2
A9 A8 A7 A6 A5 A4 A3 A2
1 2 3 4 5 6 7 8
(The black side indicates the side that
is pushed down.)
Interrupt Enable Line PC4
(factory setting) W1: Row PC4
Interrupt Level Interrupt level 5 selected
(factory setting) W2: IRQ5