PCI-7296
96-Bit Paraller Digital I/O Card for PCI

Introduction

The PCI-7296: 96-Bit Digital I/O board is a high density parallel Digial I/O board for PCI computer in industrial applications. All 96 digital I/O channels can sink 24mA for power control application.

Parallel Digital I/O
This board provides 4 sets to emulate industry standard 8255 Programmable Peripheral Interface (PPI) chips, each offers 3 ports; PA, PB, and PC. PC is subdivided into 2 nibble-wide (4-bit) ports. Each channel has an individual connector with OPTO-22 pin assignment. It is very essential to use isolated input to prevent the grond loop problems.

PCI-Bus Plug and Play
The PCI-7296 uses SAIC PCI controller to interface the board to the PCI bus. The ASIC fully implement the PCI local bus specification Rev 2.0. All bus relative configuration, such as base memory address and interrupt assignment, are automatically controlled by software. It does not need any user interaction and pre-study for configuration. This removes the burden of searching for a conflict-free configuation, which can be very time consuming and difficult with some other bus standards.

Internal Programmable Timer/Counter
PCI-7296 has a programmable timer counter for generating periodic interrupts to the host processor. The timer/counter chipset is 82C54, which includes 3 16-bit counter,at 2MHz clock input. One counter is used as an event counter for counting events coming from input channel. The reminder two are cascaded together making a 32-bit timer, which can control the rate of interrupt generation.

Features

• Compact size (suitable for any size of chassis)
• 32-bit PCI-Bus, Plug and Play
• 96 TTL/DTL compatible digital I/O lines
• Emulates Two industry standard mode 0 of 8255 PPI
• Buffered circuits for higher driving
• Direct interface with OPTO-22 compatible I/O module
• Programmable interrupt handling
• Output status readback

Specifications

I/O Channels: 96
Compatible: TTL/DTL
Reference Voltage: +5V
Data Transfer: Interrupt, Programmed I/O
Input Signal: Logic High Voltage:2.0V to 5.25V
Logic Low Voltage: 0.0V to 0.80V

Logic High Current: 22.0 µA
Logic Low Current: -0.2 mA

Output Signal (Ports A&B):
Logic High Voltage: Minimum 2.4V
Logic Low Voltage: Maximum 0.5V
Logic High Current: -2.6 mA
Logic Low Current: 24.0mA

Output Signal (Port C):
Logic High Voltage: Minimum 2.4V
Logic Low Voltage: Maximum 0.4V
Logic High Current: -15.0 mA
Logic Low Current: 24.0mA
Operating Temperature: 0° - 60°C
Storage Temperature: -20° - 80°C
Humidity: 5% ~95% non-condensing
I/O Connector: 50-pin male ribbon cble connector
BUS: 32-bit PCI Bus
BUS Interface: Slave
Power Consumption: 5V 850mA (Typical)
5V 1.0A (Maximum)
Transfer Rate: 700K bytes/sec (Typical)
150K bytes/sec (Maximum)
Dimensions: Half Size (183mm x 111mm)I/O channels

©1995 Circuit Specialists, Inc.