Acces PCI-DIO-72 Digital Input / Output Module

The Acces PCI-DIO-72 is a digital input/output module designed for PCI bus systems, offering a flexible interface for digital devices and sensors in industrial automation, data acquisition, and control applications. This module provides 72 digital I/O channels, utilizing Programmable Peripheral Interface (PPI) chips, specifically the 8255-5 type, to interface with the computer system. The card is based on a printed circuit board that is also used for models with 96 and 120 bits, with the PCI-DIO-72 being populated for 72 bits. Each I/O line is buffered and can source 32mA or sink 64mA. The PPI chips provide two 8-bit ports (A and B) and two 4-bit ports (C_high and C_low) per group, with each port configurable as either input or output latches. The I/O buffer configuration for input or output is determined by the PPI’s Control Register. The output buffers feature 10KΩ pull-up resistors to +5VDC.

### Technical Specifications

* **Interface:** PCI Bus
* **Digital I/O Channels:** 72
* **I/O Line Buffering:** Each line is buffered.
* **Current Drive Capability:** Sourcing 32mA, sinking 64mA per I/O line.
* **Programmable Peripheral Interface (PPI) Chips:** 8255-5
* **Port Configuration:**
* Each PPI supports two 8-bit ports (A, B) and two 4-bit ports (C_high, C_low).
* Each port can be configured as input or output latches via software.
* Group C can be independently set as input or output for each nibble.
* **Output Pull-up Resistors:** 10KΩ to +5VDC on output buffers.
* **Compatibility:** Universal PCI, PCI-X, 3.3V and 5V compatible.
* **Automatic Detection:** Detected by Windows 95/98/NT without manual switch settings for base address or IRQ.
* **I/O Address Space:** Occupies 16 bytes of I/O address space.
* **Base Address:** System-assigned during installation.

### Electrical Characteristics

* **VCCIO:** +5VDC supply is available to the user. Jumper selectable logic levels (5V, 3.3V, 2.5V, 1.8V) are available on some compatible models.
* **Current Sourcing/Sinking:** Each I/O line can source up to 32mA or sink up to 64mA. (Note: Older PCI-DIO-72 models may have different specifications of sourcing 15 mA or sinking 24 mA, with 64 mA available on request).

### Interfaces

* **PCI Connector:** Standard PCI connector for motherboard installation.
* **I/O Connector:** Typically a 50-pin male header connector on the mounting bracket for I/O wiring. Ribbon cables can connect to termination panels.

### Physical Characteristics

* **Card Dimensions:** The PCI-DIO-72 card is typically 12.2 inches (310 mm) long. Some PCIe variants of similar models are 10.5 inches long with a seated height of 4.2 inches.
* **Form Factor:** Designed for installation in a long PCI slot.

### Compatibility

* **Operating System Support:** Automatically detected by Windows 95/98/NT. Drivers and utilities are available for DOS, Linux, and Windows (XP and newer).
* **I/O Rack Compatibility:** Compatible with industry-standard I/O racks such as Gordos, Opto-22, Potter & Brumfield, Western Reserve Controls, Grayhill, and others.
* **PCI Bus Compatibility:** Universal PCI, PCI-X, 3.3V, and 5V compatible.

Why Choose Aumictech for Acces PCI-DIO-72?
At Aumictech, we specialize in supplying high-end digital I/O modules. Whether you need robust industrial automation solutions, reliable data acquisition capabilities, or flexible control applications, our team ensures the Acces PCI-DIO-72 delivers maximum performance for your application.