Comprehensive Product Summary: ADLINK PCI-7248 – PCI-Bus Digital I/O Card (48 DIO, Opto-22 Compatible)

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### 1. Product Overview

Product Name: PCI-7248
Model Number: PCI-7248
Series: PCI-7224/7248/7296 Digital I/O Series
Article Number: PCI-7248
Manufacturer: ADLINK Technology Inc.
Product Type: PCI-Bus Digital Input/Output (DIO) Card
Compatibility: Opto-22 standard interface modules
Form Factor: Full-size PCI card (5V PCI bus)
Manufacturer Website: [www.adlinktech.com](http://www.adlinktech.com)

The ADLINK PCI-7248 is a high-density, 48-channel parallel digital input/output card designed for industrial automation, control, and data acquisition systems. It is part of ADLINK’s NuDAQ PCI DIO product line, offering reliable, high-speed digital interfacing through the PCI bus. The card provides full compatibility with the industry-standard Opto-22 I/O module interface, enabling seamless integration with a wide range of external digital devices.

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### 2. Key Features

- 48-Channel Digital I/O: Provides 48 TTL/DTL-compatible digital input/output lines organized into two 24-bit groups.
- Opto-22 Compatibility: Fully compatible with Opto-22 standard external I/O modules and termination boards.
- 8255 PPI Emulation: Emulates two Intel 8255 Programmable Peripheral Interface chips operating in Mode 0 configuration.
- Buffered I/O Circuits: Ensures higher driving capability and signal integrity for industrial environments.
- Programmable Timer/Counter: Includes one 16-bit event counter and one 32-bit cascaded timer for interrupt generation and event counting.
- Dual Interrupt System: Supports two independent interrupt sources (INT1 and INT2) selectable from digital inputs or timer outputs.
- Plug and Play PCI Interface: Automatic resource allocation for IRQ and I/O addresses via PCI BIOS; no manual jumper configuration required.
- Power Output Protection: Provides +5V and +12V outputs on the Opto-22 connectors with resettable fuses for external device protection.
- Software Support: Includes C/C++ libraries, Windows DLLs, and drivers for multiple operating systems (DOS, Windows 95/98/NT/2000, Linux).
- High Data Transfer Rate: Supports up to 500 Kbytes/s typical transfer rate.
- Industrial Reliability: Designed for 0°C to 60°C operation and 5–95% non-condensing humidity environments.

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### 3. Technical Specifications

Digital I/O Characteristics
- Number of Channels: 48 digital I/O lines (two 24-bit PPIs)
- Logic Standard: 5V TTL/DTL compatible
- Input Voltage Levels:
- Logic High: 2.0 V to 5.25 V
- Logic Low: 0.0 V to 0.8 V
- Input Current:
- High: 20 µA
- Low: -0.2 mA
- Output Voltage Levels:
- Logic High: ≥ 2.4 V
- Logic Low: ≤ 0.5 V
- Output Drive Capability:
- Port A & B: Source 2.6 mA, Sink 24 mA
- Port C: Source 15 mA, Sink 24 mA

Electrical & Power Requirements
- Bus Interface: 5V PCI bus (32-bit)
- Power Consumption:
- Typical: 500 mA @ +5 VDC
- Maximum: 540 mA @ +5 VDC
- Power Outputs: +5V and +12V available on I/O connectors (0.5A max per connector, resettable fuse protected)

Environmental Conditions
- Operating Temperature: 0°C to 60°C
- Storage Temperature: -20°C to 80°C
- Relative Humidity: 5% to 95%, non-condensing

Physical Dimensions
- Board Size: 148 mm (L) × 102 mm (H)
- Weight: Approx. 150 g (without accessories)
- Connectors: Two 50-pin male ribbon (IDC) connectors

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### 4. Functionality

Operating Principle:
The PCI-7248 functions as a parallel digital I/O interface card, providing programmable input and output ports for industrial control and monitoring. Each of the two onboard 8255-compatible PPIs offers three 8-bit ports (A, B, and C), with Port C further divided into two 4-bit subports (C upper and C lower). Ports can be individually configured as input or output through software commands.

Use Cases and Applications:
- Industrial process monitoring and control
- Digital signal acquisition and generation
- Machine automation and PLC interfacing
- Switch, relay, and contact closure monitoring
- Keyboard or matrix scanning
- Integration with A/D and D/A modules for hybrid data acquisition systems

Compatibility:
- Fully compatible with Opto-22 digital I/O modules and termination boards
- Supported by ADLINK’s NuDAQ software suite and PCIS-DASK drivers
- Works with Windows (95/98/NT/2000), DOS, and Linux environments

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### 5. Components & Accessories

Included Items:
- PCI-7248 48-Channel Digital I/O Card
- ADLINK Software & Utility CD (includes drivers, libraries, and test utilities)
- User Manual and Software Installation Guide

Optional Termination Boards:
- TB-24R / DIN-24R: 24-channel relay output board (24V coil voltage)
- TB-24P / DIN-24P: 24-channel isolated digital input board
- TB-16P8R: 16 isolated digital inputs + 8 relay outputs
- DIN-24G: 24-channel Grayhill I/O module board with DIN-rail mounting
- DIN-50S / TB-24: General-purpose termination boards for 50-pin ribbon connectors

Cables:
- ACL-10150: 1.5-meter 50-pin flat ribbon cable (included with termination boards)

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### 6. Installation & Setup

System Requirements:
- Available 32-bit PCI slot (5V signaling)
- Compatible operating system (Windows 95/98/NT/2000, DOS, or Linux)
- Administrative privileges for driver installation

Installation Procedure:
1. Power off the computer and disconnect all peripherals.
2. Insert the PCI-7248 into an available PCI slot.
3. Secure the card using the chassis screw.
4. Power on the system; the Plug and Play BIOS will automatically assign I/O addresses and IRQ.
5. Install the ADLINK driver from the provided CD or download from ADLINK’s website.
6. Verify installation using the included test utility (7248UTIL.EXE).

Jumper Configuration:
- JA1–JC2: Define power-on state of each port (pulled high, pulled low, or floating).
- JP1–JP2: Configure +12V pins on CN1/CN2 as power or ground.
- Default jumper settings pull all signals high and set +12V pins to ground.

Connector Pinout:
Each 50-pin connector (CN1, CN2) provides 24 DIO lines plus power and ground pins.
- Pins 1–25: Signal lines (PnA0–PnC7)
- Pins 26–50: Ground and power lines (+5V, +12V selectable)

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### 7. Performance & Capabilities

Data Transfer Rate: Up to 500 Kbytes/s (typical)
Timer/Counter:
- One 8254 programmable timer/counter chip
- Three counters per chip, six operation modes
- 32-bit cascaded timer for watchdog or periodic interrupts
- 16-bit event counter for external event counting (input via P1C4)
- Input clock frequency: 2 MHz
- Timer frequency range: 0.000466 Hz to 500 kHz

Interrupt System:
- Dual interrupt architecture (INT1 and INT2)
- Selectable interrupt sources:
- INT1: P1C0, P1C3, or event counter
- INT2: P2C0, P2C3, or timer output
- Programmable trigger conditions (rising/falling edge, logical combinations)
- Single IRQ level assigned by PCI BIOS (INTA# line)

Power Output Protection:
- Resettable fuses on +5V and +12V outputs
- Maximum current per connector: 0.5A
- Automatic recovery after overload removal

Limitations:
- No isolation between channels (use external isolation boards if required)
- Limited current sourcing capability on Port A/B (2.6 mA)

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### 8. Standards & Compliance

- Bus Interface: PCI Local Bus Specification Revision 2.1 compliant
- Logic Standard: TTL/DTL compatible
- Opto-22 Interface: Fully compliant with Opto-22 I/O module pinout
- Environmental Compliance: Designed for industrial temperature and humidity ranges
- Safety & EMC: Meets CE and FCC Class A industrial standards (as per ADLINK product line)
- Software Compatibility:
- PCIS-DASK (Windows 98/NT/2000)
- PCIS-DASK/X (Linux)
- PCIS-LVIEW (LabVIEW® driver)
- PCIS-VEE (HP VEE™ driver)
- DAQBench™ ActiveX controls
- PCIS-DDE (DDE Server for InTouch™)
- PCIS-ISG (ISaGRAF™ driver)
- PCIS-ICL (InControl™ driver)
- PCIS-OPC (OPC Server)

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### 9. Additional Information

Software Support:
- Programming Libraries: C/C++ for DOS and Windows, Visual Basic, Delphi
- Operating Systems: DOS, Windows 95/98/NT/2000, Linux
- Utilities:
- 7248UTIL.EXE – Diagnostic and test utility
- INIT7248.EXE – Configuration and interrupt setup utility
- Driver Files:
- Windows 95/98: W95_7248.VXD, PCIW95.VXD
- Windows NT/2000: PCIS-DASK driver package
- Linux: PCIS-DASK/X shared library

Maintenance:
- No periodic calibration required
- Keep connectors clean and free of dust
- Avoid exceeding rated current on power outputs

Warranty:
- Standard Warranty: Two years from date of shipment (one year in earlier revisions)
- Coverage: Free repair or replacement for defects in materials or workmanship
- Exclusions: Damage due to misuse, modification, or environmental factors
- Service Contact:
- Email: service@adlinktech.com
- Tel: +886-2-82265877
- Address: 9F, No. 166, Jian Yi Road, Chungho City, Taipei 235, Taiwan

Support Resources:
- Online documentation and driver downloads at [www.adlinktech.com](http://www.adlinktech.com)
- Technical support via email or authorized distributors
- RMA service available with completed application form

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### Summary

The ADLINK PCI-7248 is a robust, high-performance 48-channel digital I/O card engineered for industrial automation and data acquisition applications. Its Opto-22 compatibility, dual-interrupt architecture, and programmable timer/counter make it a versatile solution for digital control, monitoring, and event-driven systems. With comprehensive software support across multiple platforms and integration with major industrial software environments, the PCI-7248 provides a reliable and flexible interface between PCs and external digital devices.

Its combination of high channel density, PCI Plug and Play convenience, and industrial-grade reliability ensures long-term performance in demanding environments such as factory automation, process control, and test instrumentation systems.