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AX5224H

24 TTL DIO digital input/putput AT ISA Card
  • Hersteller Axiom
  • Kategorie: Counter/Timer ISA
  • The Axiom AX5224H is a high-performance 24-bit TTL/DTL compatible digital input/output (DIO) and 3-channel counter/timer AT ISA card designed for industrial automation, data acquisition, and control applications. It provides a flexible and reliable interface between a PC/AT-compatible computer and external digital devices, sensors, or actuators. The board integrates 24 programmable digital I/O lines and three 16-bit programmable counters/timers based on the industry-standard 82C54 chip, offering precise timing and counting capabilities.
- 24 TTL/DTL Compatible Digital I/O Lines: Arranged into three 8-bit groups, each group can be independently configured as input or output, providing flexible digital interfacing options.
- High Output Drive Capability: Each output line supports a sink current of up to 24 mA, allowing direct control of LEDs, relays, or other low-power devices.
- 8255 Mode 0 Emulation: The DIO section emulates the Intel 8255 Programmable Peripheral Interface (PPI) in Mode 0, ensuring compatibility with legacy software and hardware designs.
- Three Programmable Counter/Timer Channels: Incorporates an 82C54 counter/timer chip with three independent 16-bit counters, supporting six programmable modes for event counting, frequency measurement, and pulse generation.
- Wide Frequency Range: The counter/timer operates from DC to 10 MHz, suitable for both slow and high-speed timing applications.
- Onboard Oscillator: Integrated 10 MHz oscillator provides a stable timing source for the counters, with jumper-selectable frequency options (10 MHz, 1 MHz, or 100 kHz).
- Counter Chaining Capability: Jumpers allow chaining of counters for extended counting range or complex timing operations.
- Interrupt Generation: Supports multiple interrupt request lines (IRQ2–15) for event-driven applications, enabling efficient CPU utilization.
- Enhanced Noise Immunity: Input hysteresis with typical thresholds (VT+ / VT– = 0.4 V) improves noise margins and signal stability in industrial environments.
- Breadboard Area: Provides a small prototyping area for custom circuitry integration or signal conditioning.
- Dual I/O Connectors: Equipped with a 50-pin male ribbon connector and a 20-pin male ribbon connector for flexible external wiring and accessory connection.
- Software Support: Includes DOS and Windows® 3.1/95/98/2000/NT drivers, DLLs, and utilities for easy integration into software applications.
- Accessory Compatibility: Fully compatible with Axiom’s signal conditioning and terminal boards such as AX754, AX755, AX756, and AX951A.
- Industrial-Grade Design: Designed for reliable operation in industrial environments with wide humidity tolerance and robust electrical characteristics.

Ursprungsland: Taiwan R.O.C.

Zolltarifnummer: 8473 3020 000

1. Product Overview

Product Name: AX5224H
Model: AX5224H
Series: AX5000 DA&C Cards – Industrial Automation Series
Article Number: AX5224H
Manufacturer: Axiom

The Axiom AX5224H is a high-performance 24-bit TTL/DTL compatible digital input/output (DIO) and 3-channel counter/timer AT ISA card designed for industrial automation, data acquisition, and control applications. It provides a flexible and reliable interface between a PC/AT-compatible computer and external digital devices, sensors, or actuators. The board integrates 24 programmable digital I/O lines and three 16-bit programmable counters/timers based on the industry-standard 82C54 chip, offering precise timing and counting capabilities. With its robust design, onboard oscillator, and compatibility with a wide range of signal conditioning accessories, the AX5224H is a versatile solution for engineers and system integrators requiring dependable digital control and measurement functionality.




2. Key Features

- 24 TTL/DTL Compatible Digital I/O Lines: Arranged into three 8-bit groups, each group can be independently configured as input or output, providing flexible digital interfacing options.
- High Output Drive Capability: Each output line supports a sink current of up to 24 mA, allowing direct control of LEDs, relays, or other low-power devices.
- 8255 Mode 0 Emulation: The DIO section emulates the Intel 8255 Programmable Peripheral Interface (PPI) in Mode 0, ensuring compatibility with legacy software and hardware designs.
- Three Programmable Counter/Timer Channels: Incorporates an 82C54 counter/timer chip with three independent 16-bit counters, supporting six programmable modes for event counting, frequency measurement, and pulse generation.
- Wide Frequency Range: The counter/timer operates from DC to 10 MHz, suitable for both slow and high-speed timing applications.
- Onboard Oscillator: Integrated 10 MHz oscillator provides a stable timing source for the counters, with jumper-selectable frequency options (10 MHz, 1 MHz, or 100 kHz).
- Counter Chaining Capability: Jumpers allow chaining of counters for extended counting range or complex timing operations.
- Interrupt Generation: Supports multiple interrupt request lines (IRQ2–15) for event-driven applications, enabling efficient CPU utilization.
- Enhanced Noise Immunity: Input hysteresis with typical thresholds (VT+ / VT– = 0.4 V) improves noise margins and signal stability in industrial environments.
- Breadboard Area: Provides a small prototyping area for custom circuitry integration or signal conditioning.
- Dual I/O Connectors: Equipped with a 50-pin male ribbon connector and a 20-pin male ribbon connector for flexible external wiring and accessory connection.
- Software Support: Includes DOS and Windows® 3.1/95/98/2000/NT drivers, DLLs, and utilities for easy integration into software applications.
- Accessory Compatibility: Fully compatible with Axiom’s signal conditioning and terminal boards such as AX754, AX755, AX756, and AX951A.
- Industrial-Grade Design: Designed for reliable operation in industrial environments with wide humidity tolerance and robust electrical characteristics.




3. Technical Specifications

Digital Input/Output
- Number of I/O Lines: 24
- Configuration: TTL/DTL compatible
- Grouping: 3 × 8-bit ports (Port A, Port B, Port C)
- Operation Mode: Emulates 8255 Mode 0
- Output Sink Current: 24 mA per line
- Input Thresholds: Hysteresis with VT+ / VT– = 0.4 V (typical)
- Interrupt Lines: Selectable from IRQ2, 3, 4, 5, 6, 7, 10, 11, 12, 14, 15

Programmable Counter/Timer
- Chip Type: 82C54 (compatible with Intel 8254)
- Number of Counters: 3 independent 16-bit counters
- Frequency Range: DC to 10 MHz
- Programmable Modes: 6 (Mode 0–5)
- Input/Output Levels: TTL, DTL, CMOS compatible
- Clock Source: Onboard 10 MHz oscillator (jumper-selectable frequency options)
- Counter Chaining: Supported via jumper configuration

Interface Characteristics
- Bus Compatibility: IBM™ PC/AT and compatible ISA I/O bus
- Connectors:
- 50-pin male ribbon connector (primary I/O)
- 20-pin male ribbon connector (auxiliary I/O)

Power Requirements
- Supply Voltage: +5 V DC
- Current Consumption: 400 mA (typical)

Physical and Environmental
- Dimensions: 175 mm × 99 mm
- Weight: 110 g
- Relative Humidity: 0–90%, non-condensing
- Operating Temperature: Standard industrial range (not explicitly specified, typically 0–50°C for similar models)




4. Functionality

The AX5224H functions as a digital interface and timing module for PC-based control systems. It connects directly to the ISA bus of an IBM PC/AT or compatible computer, allowing the host system to read digital inputs, control digital outputs, and perform timing or counting operations.

Digital I/O Operation:
Each of the 24 digital lines can be configured as input or output in groups of eight. The TTL/DTL compatibility ensures seamless interfacing with standard logic-level devices. Outputs can drive up to 24 mA sink current, suitable for direct control of indicators or relays. Inputs feature hysteresis for noise immunity, making the board reliable in electrically noisy industrial environments.

Counter/Timer Operation:
The integrated 82C54 counter/timer provides three 16-bit channels, each capable of operating in one of six programmable modes. These modes support event counting, frequency measurement, pulse-width modulation, and time delay generation. The counters can be clocked from the onboard oscillator or an external source, and chaining allows extended counting capabilities.

Interrupt Handling:
The board supports multiple interrupt request lines (IRQ2–15), enabling event-driven data acquisition or control. This allows the system to respond immediately to external triggers without continuous polling.

Use Cases and Applications:
- Industrial automation and process control
- Machine monitoring and event counting (e.g., conveyor belt item counting, door open/close detection)
- Frequency and pulse measurement
- Digital signal monitoring and control
- Laboratory instrumentation and data acquisition systems
- Educational and research applications requiring programmable digital I/O

Compatibility:
The AX5224H is compatible with IBM PC/AT and ISA-bus computers. It interfaces easily with Axiom’s range of terminal and signal conditioning boards, including relay output, opto-isolated input, and screw terminal panels.




5. Components & Accessories

Included Components:
- AX5224H ISA card
- Software driver CD-ROM (AS59099) containing DOS and Windows drivers, DLLs, and utilities
- User manual and installation guide

Optional Accessories:
- AX951A: Universal screw terminal panel for signal conditioning and easy wiring.
- AX754: 24-channel opto-isolated digital input board for electrical isolation and protection.
- AX755/24: Combined 24-channel relay output and 24-channel opto-isolated digital input board.
- AX756A/B: 24-channel relay actuator board for controlling external loads.
- SSR I/O Panels and Modules: Solid-state relay panels available for high-reliability switching applications.

These accessories connect via the 50-pin or 20-pin ribbon connectors, providing flexible interfacing options for various industrial environments.




6. Installation & Setup

System Requirements:
- IBM PC/AT or compatible computer with an available ISA slot
- +5 V DC power supply (provided by the PC bus)
- Supported operating systems: DOS, Windows 3.1, Windows 95/98/2000/NT

Installation Steps:
1. Power off the computer and remove the cover.
2. Insert the AX5224H card into an available ISA slot, ensuring proper alignment.
3. Secure the card with the mounting screw.
4. Connect external devices or terminal boards to the 50-pin and/or 20-pin connectors using ribbon cables.
5. Configure jumpers for counter chaining, oscillator frequency selection, and interrupt line assignment as required.
6. Power on the system and install the software drivers from the provided CD-ROM.
7. Use the included utility software to verify board operation and configure I/O settings.

Mounting Options:
The card is designed for internal installation within a PC chassis. External signal connections are made via ribbon cables to terminal boards mounted in a control cabinet or test bench.

Configuration:
- Jumper Settings: Used to select interrupt lines, oscillator frequency, and counter chaining options.
- Software Configuration: Performed through the provided driver utilities or third-party software (LabVIEW, DASYLab, etc.).




7. Performance & Capabilities

Speed and Timing:
The AX5224H’s 82C54 counter/timer supports input frequencies up to 10 MHz, allowing precise timing and high-speed event counting. The onboard oscillator ensures stable operation, while jumper-selectable frequency sources provide flexibility for different timing requirements.

Capacity:
- 24 digital I/O lines for simultaneous monitoring and control of multiple signals.
- 3 independent 16-bit counters, each capable of counting up to 65,535 events before rollover.
- Counter chaining extends counting capacity beyond 16 bits for high-resolution applications.

Efficiency:
Interrupt-driven operation minimizes CPU load by allowing the system to respond only when events occur. The board’s TTL/DTL compatibility ensures low power consumption and fast switching times.

Limitations:
- Limited to ISA bus systems (not compatible with PCI or PCIe without an adapter).
- DOS and Windows 3.1 drivers not available for PCI versions.
- Operating temperature range not explicitly specified; intended for standard industrial environments.




8. Standards & Compliance

Bus Compatibility: IBM PC/AT ISA standard
Electrical Standards: TTL/DTL logic levels, CMOS compatible inputs/outputs
Software Standards: Supports standard Windows DLL and ActiveX interfaces
Regulatory Compliance:
- Designed for industrial use with adherence to general EMC and safety guidelines (specific certifications not listed)
- Compatible with Axiom’s industrial DA&C ecosystem

Industry Standards Supported:
- 8255 PPI Mode 0 emulation
- 82C54 counter/timer standard
- TTL/DTL logic interface standards




9. Additional Information

Warranty:
Axiom provides a standard manufacturer’s warranty covering defects in materials and workmanship (duration not specified; typically one year for similar products).

Technical Support:
Comprehensive technical support is available through Axiom’s customer service channels, including documentation, driver updates, and application notes.

Maintenance:
The AX5224H requires minimal maintenance. Periodic inspection of connectors and cables is recommended to ensure reliable operation. The board should be kept free from dust and moisture.

Software Updates:
Driver and utility updates are available from Axiom’s website. The AS59099 driver package includes DLLs and utilities for DOS and Windows 3.1/95/98/2000/NT. The AS59080 package adds ActiveX control drivers, third-party software drivers (LabVIEW, LABTECH, DASYLab), and an OPC server for integration into modern automation systems.

Product Lifecycle and Compatibility:
The AX5224H remains a cost-effective solution for legacy ISA-based systems and industrial control applications. It is part of Axiom’s broader DA&C (Data Acquisition and Control) product family, ensuring long-term support and compatibility with other Axiom modules and accessories.




Summary

The Axiom AX5224H 24 TTL DIO Digital Input/Output AT ISA Card is a robust, feature-rich interface board designed for industrial automation, data acquisition, and control applications. With 24 programmable digital I/O lines, three high-speed 16-bit counters, and flexible interrupt and timing options, it delivers precise control and measurement capabilities. Its compatibility with IBM PC/AT systems, wide range of accessory boards, and comprehensive software support make it an ideal choice for engineers seeking reliable, configurable digital interfacing in industrial or laboratory environments.

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