Measurement Computing's PCI-DIO24H/SIPSCKT is a low-cost, 24-bit, logic level digital I/O board for PCI bus compatible computers. The PCI-DIO24H/SIPSCKT is based on the industry standard 82C55 chip, and the 82C55 I/O pins are brought 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-DIO24H/SIPSCKT 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 a wide variety of external signal conditioning, including electromechanical relay and solid state I/O module racks.
The use of pull-up resistors and pull-down resistors is important if you need to set a fixed default value to keep the input value from floating.
"When we started designing these systems, we needed to locate a robust data acquisition unit that we could trust, have multiple inputs and a simple but effective software interface and a reasonable price." Michael Gray, Precia Molen
"We have used MCC devices for many years on any number of different projects, from pile testing to seismic tests, and we've always been more than satisified with their performance. This was the natural choice for us." Stephen Kemp, Manager, GBG Structural Services
