Data Acquisition

General Description

The PCI-DIO24/S is a 24-bit, logic level digital I/O board for PCI bus compatible computers. The PCI-DIO24/S includes built-in surge suppressor circuitry that protects the I/O of the board against ±15 kV (air) or ±8 kV (contact) surges and/or spikes. PCI-DIO24/S is based on the industry standard 82C55 chip. The 82C55 I/O pins are brought through the boards protection circuitry and then directly to the board's I/O connector. The 82C55 is a powerful 24 bit chip and functions as two 8-bit ports, (Ports A and B) and a third 8-bit port (Port C) that may be further divided into two 4-bit ports (Port C-HI and C-LO). The CMOS outputs of the 82C55 are suitable for driving a wide array of logic devices, though the chips ±2.5 mA drive capability may not be enough in some applications.

The PCI-DIO24/S is connector and software compatible with Measurement Computing's highly popular ISA based CIO-DIO24 board as well as a host of other 8255 based boards from other vendors. The board is also supported by the same wide variety of external relay and solid state I/O module racks as the CIO-DIO24 boards.

The PCI-DIO24/S is completely plug-and-play. There are no switches, or jumpers on the board. All board addresses, interrupt channels etc. are set by your computers plug-and-play software.