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- 24 TTL Digital I/O Channels: Provides 24 channels configurable as digital inputs or outputs, supporting standard TTL logic levels for compatibility with a wide range of digital devices and sensors.
- High Output Sink Current: Each output channel supports up to 24 mA sink current, enabling direct drive of LEDs, relays, and other low-power actuators without additional driver circuitry.
- Integrated 10 MHz Oscillator: Onboard oscillator provides a stable clock source for timing, counting, and interrupt generation, ensuring precise synchronization and timing accuracy.
- Interrupt Generation Capability: Supports hardware interrupt generation for event-driven applications, allowing the host system to respond immediately to external digital events.
- Three 16-bit Programmable Counters (82C54): Incorporates an Intel 82C54-compatible programmable interval timer/counter with three independent 16-bit counters, each capable of operating from DC up to 10 MHz.
- Counter Chaining Support: Counters can be cascaded (chained) for extended counting range or complex timing operations, providing flexibility for frequency measurement, pulse counting, or waveform generation.
- Breadboard Area for Custom Circuits: Includes a dedicated prototyping area on the PCB, allowing users to integrate custom circuits, signal conditioning, or interface logic directly on the card.
- Dual Connector Interface: Equipped with a 50-pin main connector and an additional 20-pin auxiliary connector, providing flexible connectivity options for external devices and expansion modules.
- Compact Form Factor: PCB dimensions of 129 mm x 99 mm, suitable for standard ISA slots in industrial PCs and legacy control systems.
- ISA Bus Interface: Fully compatible with the standard PC ISA bus architecture, ensuring reliable communication and easy integration into existing systems.
- High Output Sink Current: Each output channel supports up to 24 mA sink current, enabling direct drive of LEDs, relays, and other low-power actuators without additional driver circuitry.
- Integrated 10 MHz Oscillator: Onboard oscillator provides a stable clock source for timing, counting, and interrupt generation, ensuring precise synchronization and timing accuracy.
- Interrupt Generation Capability: Supports hardware interrupt generation for event-driven applications, allowing the host system to respond immediately to external digital events.
- Three 16-bit Programmable Counters (82C54): Incorporates an Intel 82C54-compatible programmable interval timer/counter with three independent 16-bit counters, each capable of operating from DC up to 10 MHz.
- Counter Chaining Support: Counters can be cascaded (chained) for extended counting range or complex timing operations, providing flexibility for frequency measurement, pulse counting, or waveform generation.
- Breadboard Area for Custom Circuits: Includes a dedicated prototyping area on the PCB, allowing users to integrate custom circuits, signal conditioning, or interface logic directly on the card.
- Dual Connector Interface: Equipped with a 50-pin main connector and an additional 20-pin auxiliary connector, providing flexible connectivity options for external devices and expansion modules.
- Compact Form Factor: PCB dimensions of 129 mm x 99 mm, suitable for standard ISA slots in industrial PCs and legacy control systems.
- ISA Bus Interface: Fully compatible with the standard PC ISA bus architecture, ensuring reliable communication and easy integration into existing systems.
1. Product Overview
Product Name: AX5224
Model Number: AX5224
Series: AX5000 Series (Industrial I/O Interface Cards)
Article Number: AX5224
Manufacturer: Axiom
The Axiom AX5224 is a high-performance 24-channel TTL digital input/output (DIO) PC ISA card designed for industrial automation, laboratory instrumentation, and embedded control systems. It provides a flexible and reliable interface between a host PC and external digital devices, offering both input and output capabilities with robust electrical characteristics and integrated timing and counting functions. The card is engineered for developers and system integrators who require precise digital control, event counting, and signal generation within ISA-based computing environments.
2. Key Features
- 24 TTL Digital I/O Channels: Provides 24 channels configurable as digital inputs or outputs, supporting standard TTL logic levels for compatibility with a wide range of digital devices and sensors.
- High Output Sink Current: Each output channel supports up to 24 mA sink current, enabling direct drive of LEDs, relays, and other low-power actuators without additional driver circuitry.
- Integrated 10 MHz Oscillator: Onboard oscillator provides a stable clock source for timing, counting, and interrupt generation, ensuring precise synchronization and timing accuracy.
- Interrupt Generation Capability: Supports hardware interrupt generation for event-driven applications, allowing the host system to respond immediately to external digital events.
- Three 16-bit Programmable Counters (82C54): Incorporates an Intel 82C54-compatible programmable interval timer/counter with three independent 16-bit counters, each capable of operating from DC up to 10 MHz.
- Counter Chaining Support: Counters can be cascaded (chained) for extended counting range or complex timing operations, providing flexibility for frequency measurement, pulse counting, or waveform generation.
- Breadboard Area for Custom Circuits: Includes a dedicated prototyping area on the PCB, allowing users to integrate custom circuits, signal conditioning, or interface logic directly on the card.
- Dual Connector Interface: Equipped with a 50-pin main connector and an additional 20-pin auxiliary connector, providing flexible connectivity options for external devices and expansion modules.
- Compact Form Factor: PCB dimensions of 129 mm x 99 mm, suitable for standard ISA slots in industrial PCs and legacy control systems.
- ISA Bus Interface: Fully compatible with the standard PC ISA bus architecture, ensuring reliable communication and easy integration into existing systems.
3. Technical Specifications
| Parameter | Specification |
|----------------|-------------------|
| Product Type | 24-channel TTL Digital Input/Output ISA Card |
| Bus Interface | PC ISA (Industry Standard Architecture) |
| Digital I/O Channels | 24 TTL-compatible channels |
| Logic Level | TTL (Transistor-Transistor Logic) |
| Output Sink Current | 24 mA per channel (maximum) |
| Input Voltage Range | TTL logic levels (typically 0–5 V) |
| Oscillator Frequency | 10 MHz onboard oscillator |
| Counter Device | 82C54 programmable interval timer/counter |
| Number of Counters | 3 independent 16-bit counters |
| Counter Frequency Range | DC to 10 MHz |
| Counter Chaining | Supported (for extended counting range) |
| Interrupt Capability | Yes (programmable interrupt generation) |
| Connectors | 1 × 50-pin header, 1 × 20-pin header |
| Prototyping Area | Integrated breadboard area for custom circuits |
| PCB Dimensions | 129 mm (L) × 99 mm (W) |
| Mounting Type | Plug-in ISA card |
| Manufacturer | Axiom |
| Model Number | AX5224 |
| Operating Environment | Standard PC/industrial environment (temperature and humidity per ISA specifications) |
4. Functionality
The Axiom AX5224 functions as a digital interface card that bridges the PC’s ISA bus with external digital devices. It allows the host computer to read digital input signals and control digital outputs through software commands. Each of the 24 channels can be configured as input or output, depending on the application requirements.
The 82C54 programmable counter/timer provides three independent 16-bit counters that can be used for event counting, frequency measurement, pulse-width modulation, or time-delay generation. The counters can operate independently or be chained together for extended counting capabilities. The onboard 10 MHz oscillator serves as a precise timing source for these counters and for generating interrupts.
The interrupt generation feature enables event-driven control, where the card can signal the host CPU upon specific input changes or counter events, reducing CPU polling overhead and improving system responsiveness.
Typical use cases include:
- Industrial process control and automation
- Digital signal monitoring and logging
- Laboratory instrumentation and data acquisition
- Machine control and robotics
- Frequency and pulse measurement
- Custom embedded control systems
The integrated breadboard area allows engineers to prototype additional circuitry directly on the card, such as signal conditioning, buffering, or custom logic, without requiring external prototyping boards.
5. Components & Accessories
Included Components:
- Axiom AX5224 ISA card (main unit)
- 50-pin and 20-pin onboard connectors for external interfacing
- Onboard 10 MHz oscillator
- Integrated 82C54 programmable counter/timer
- Breadboard prototyping area
Optional Accessories (available separately):
- Ribbon cables for 50-pin and 20-pin connectors
- Terminal boards or breakout modules for easy wiring
- Mounting brackets for secure installation in industrial PC chassis
- Software drivers and sample code (depending on system configuration)
Connectors:
- 50-pin header: Primary I/O interface for digital channels and control signals
- 20-pin header: Auxiliary interface for additional signals or custom extensions
6. Installation & Setup
The AX5224 is designed for plug-in installation into a standard ISA slot of a desktop or industrial PC. Installation involves the following steps:
1. Power off the host PC and remove the chassis cover.
2. Insert the AX5224 card into an available ISA slot, ensuring proper alignment and secure seating.
3. Connect external devices to the 50-pin and/or 20-pin connectors using appropriate ribbon cables or terminal boards.
4. Configure any required jumper settings (if applicable) for I/O addressing or interrupt selection.
5. Power on the system and install any necessary software drivers or configuration utilities.
6. Verify operation through diagnostic software or test routines.
Mounting Options:
- Standard ISA slot mounting with rear bracket support
- Optional standoffs or securing screws for industrial environments
Configuration:
- I/O base address and interrupt line selection (via jumpers or software configuration)
- Counter mode setup (through software programming of the 82C54 registers)
- Input/output direction control for each channel
7. Performance & Capabilities
The AX5224 delivers robust digital I/O performance suitable for demanding industrial and laboratory applications.
Speed and Timing:
- The onboard 10 MHz oscillator ensures stable timing for counter and interrupt operations.
- The 82C54 counters can operate from DC up to 10 MHz, supporting high-frequency event counting and precise timing intervals.
Capacity:
- 24 digital I/O lines provide ample capacity for interfacing with multiple sensors, switches, or actuators simultaneously.
- Counter chaining allows extended counting beyond 16-bit resolution, enabling long-duration or high-count applications.
Efficiency:
- Hardware interrupt capability reduces CPU load by eliminating the need for continuous polling.
- TTL-level compatibility ensures low power consumption and high signal integrity.
Limitations:
- ISA bus interface limits compatibility to legacy or industrial PC systems with ISA slots.
- TTL logic levels restrict direct interfacing with higher-voltage industrial signals without external conditioning.
8. Standards & Compliance
The AX5224 adheres to standard PC ISA bus electrical and mechanical specifications, ensuring interoperability with compliant systems.
Compliance and Standards:
- Bus Standard: PC ISA (Industry Standard Architecture)
- Logic Standard: TTL (Transistor-Transistor Logic)
- Counter Standard: Intel 82C54-compatible programmable interval timer
- Electrical Safety: Designed to meet standard PC/industrial safety requirements
- EMC Compliance: Meets typical electromagnetic compatibility standards for ISA-based devices (when installed in compliant systems)
Regulatory Compliance:
- RoHS (Restriction of Hazardous Substances) compliance (depending on production batch)
- CE marking (for applicable regions)
9. Additional Information
Warranty:
Axiom typically provides a limited manufacturer’s warranty covering defects in materials and workmanship for a specified period (commonly one year from the date of purchase). Warranty terms may vary by region or distributor.
Technical Support:
Axiom offers technical documentation, user manuals, and application notes to assist with installation, configuration, and programming. Support may include:
- Driver and software library downloads
- Example source code for counter and I/O operations
- Troubleshooting guides and FAQs
- Direct technical assistance via email or support portal
Maintenance:
The AX5224 requires minimal maintenance. Periodic inspection of connectors and contacts is recommended to ensure reliable electrical connections. The card should be operated within specified environmental conditions to maintain performance and longevity.
Firmware and Software Updates:
As an ISA-based hardware device, the AX5224 primarily relies on host-side software for configuration and control. Updates may include:
- Enhanced driver support for newer operating systems
- Improved diagnostic utilities
- Updated documentation and programming examples
Serviceability:
The card’s modular design allows for easy replacement or upgrade within compatible ISA systems. The integrated breadboard area provides flexibility for user modifications without affecting the core functionality.
Summary
The Axiom AX5224 24 TTL DIO Digital Input/Output PC ISA Card is a versatile and reliable solution for digital interfacing, timing, and control applications. With 24 TTL-compatible I/O channels, a 10 MHz oscillator, and three 16-bit programmable counters, it offers precise control and measurement capabilities for industrial automation, laboratory instrumentation, and embedded systems. Its interrupt generation, counter chaining, and onboard prototyping area make it a powerful tool for engineers and developers seeking a customizable and high-performance digital I/O interface within ISA-based computing environments.
Key Highlights:
- 24 TTL digital I/O channels with 24 mA sink current
- Integrated 10 MHz oscillator and interrupt generation
- Three 16-bit 82C54 counters (DC–10 MHz) with chaining support
- Breadboard area for custom circuit integration
- Dual connectors (50-pin + 20-pin) for flexible interfacing
- Compact 129 × 99 mm ISA card form factor
- Designed and manufactured by Axiom for industrial-grade reliability
Total Length: ~3,050 tokens (approx. 12,000 characters)
Product Name: AX5224
Model Number: AX5224
Series: AX5000 Series (Industrial I/O Interface Cards)
Article Number: AX5224
Manufacturer: Axiom
The Axiom AX5224 is a high-performance 24-channel TTL digital input/output (DIO) PC ISA card designed for industrial automation, laboratory instrumentation, and embedded control systems. It provides a flexible and reliable interface between a host PC and external digital devices, offering both input and output capabilities with robust electrical characteristics and integrated timing and counting functions. The card is engineered for developers and system integrators who require precise digital control, event counting, and signal generation within ISA-based computing environments.
2. Key Features
- 24 TTL Digital I/O Channels: Provides 24 channels configurable as digital inputs or outputs, supporting standard TTL logic levels for compatibility with a wide range of digital devices and sensors.
- High Output Sink Current: Each output channel supports up to 24 mA sink current, enabling direct drive of LEDs, relays, and other low-power actuators without additional driver circuitry.
- Integrated 10 MHz Oscillator: Onboard oscillator provides a stable clock source for timing, counting, and interrupt generation, ensuring precise synchronization and timing accuracy.
- Interrupt Generation Capability: Supports hardware interrupt generation for event-driven applications, allowing the host system to respond immediately to external digital events.
- Three 16-bit Programmable Counters (82C54): Incorporates an Intel 82C54-compatible programmable interval timer/counter with three independent 16-bit counters, each capable of operating from DC up to 10 MHz.
- Counter Chaining Support: Counters can be cascaded (chained) for extended counting range or complex timing operations, providing flexibility for frequency measurement, pulse counting, or waveform generation.
- Breadboard Area for Custom Circuits: Includes a dedicated prototyping area on the PCB, allowing users to integrate custom circuits, signal conditioning, or interface logic directly on the card.
- Dual Connector Interface: Equipped with a 50-pin main connector and an additional 20-pin auxiliary connector, providing flexible connectivity options for external devices and expansion modules.
- Compact Form Factor: PCB dimensions of 129 mm x 99 mm, suitable for standard ISA slots in industrial PCs and legacy control systems.
- ISA Bus Interface: Fully compatible with the standard PC ISA bus architecture, ensuring reliable communication and easy integration into existing systems.
3. Technical Specifications
| Parameter | Specification |
|----------------|-------------------|
| Product Type | 24-channel TTL Digital Input/Output ISA Card |
| Bus Interface | PC ISA (Industry Standard Architecture) |
| Digital I/O Channels | 24 TTL-compatible channels |
| Logic Level | TTL (Transistor-Transistor Logic) |
| Output Sink Current | 24 mA per channel (maximum) |
| Input Voltage Range | TTL logic levels (typically 0–5 V) |
| Oscillator Frequency | 10 MHz onboard oscillator |
| Counter Device | 82C54 programmable interval timer/counter |
| Number of Counters | 3 independent 16-bit counters |
| Counter Frequency Range | DC to 10 MHz |
| Counter Chaining | Supported (for extended counting range) |
| Interrupt Capability | Yes (programmable interrupt generation) |
| Connectors | 1 × 50-pin header, 1 × 20-pin header |
| Prototyping Area | Integrated breadboard area for custom circuits |
| PCB Dimensions | 129 mm (L) × 99 mm (W) |
| Mounting Type | Plug-in ISA card |
| Manufacturer | Axiom |
| Model Number | AX5224 |
| Operating Environment | Standard PC/industrial environment (temperature and humidity per ISA specifications) |
4. Functionality
The Axiom AX5224 functions as a digital interface card that bridges the PC’s ISA bus with external digital devices. It allows the host computer to read digital input signals and control digital outputs through software commands. Each of the 24 channels can be configured as input or output, depending on the application requirements.
The 82C54 programmable counter/timer provides three independent 16-bit counters that can be used for event counting, frequency measurement, pulse-width modulation, or time-delay generation. The counters can operate independently or be chained together for extended counting capabilities. The onboard 10 MHz oscillator serves as a precise timing source for these counters and for generating interrupts.
The interrupt generation feature enables event-driven control, where the card can signal the host CPU upon specific input changes or counter events, reducing CPU polling overhead and improving system responsiveness.
Typical use cases include:
- Industrial process control and automation
- Digital signal monitoring and logging
- Laboratory instrumentation and data acquisition
- Machine control and robotics
- Frequency and pulse measurement
- Custom embedded control systems
The integrated breadboard area allows engineers to prototype additional circuitry directly on the card, such as signal conditioning, buffering, or custom logic, without requiring external prototyping boards.
5. Components & Accessories
Included Components:
- Axiom AX5224 ISA card (main unit)
- 50-pin and 20-pin onboard connectors for external interfacing
- Onboard 10 MHz oscillator
- Integrated 82C54 programmable counter/timer
- Breadboard prototyping area
Optional Accessories (available separately):
- Ribbon cables for 50-pin and 20-pin connectors
- Terminal boards or breakout modules for easy wiring
- Mounting brackets for secure installation in industrial PC chassis
- Software drivers and sample code (depending on system configuration)
Connectors:
- 50-pin header: Primary I/O interface for digital channels and control signals
- 20-pin header: Auxiliary interface for additional signals or custom extensions
6. Installation & Setup
The AX5224 is designed for plug-in installation into a standard ISA slot of a desktop or industrial PC. Installation involves the following steps:
1. Power off the host PC and remove the chassis cover.
2. Insert the AX5224 card into an available ISA slot, ensuring proper alignment and secure seating.
3. Connect external devices to the 50-pin and/or 20-pin connectors using appropriate ribbon cables or terminal boards.
4. Configure any required jumper settings (if applicable) for I/O addressing or interrupt selection.
5. Power on the system and install any necessary software drivers or configuration utilities.
6. Verify operation through diagnostic software or test routines.
Mounting Options:
- Standard ISA slot mounting with rear bracket support
- Optional standoffs or securing screws for industrial environments
Configuration:
- I/O base address and interrupt line selection (via jumpers or software configuration)
- Counter mode setup (through software programming of the 82C54 registers)
- Input/output direction control for each channel
7. Performance & Capabilities
The AX5224 delivers robust digital I/O performance suitable for demanding industrial and laboratory applications.
Speed and Timing:
- The onboard 10 MHz oscillator ensures stable timing for counter and interrupt operations.
- The 82C54 counters can operate from DC up to 10 MHz, supporting high-frequency event counting and precise timing intervals.
Capacity:
- 24 digital I/O lines provide ample capacity for interfacing with multiple sensors, switches, or actuators simultaneously.
- Counter chaining allows extended counting beyond 16-bit resolution, enabling long-duration or high-count applications.
Efficiency:
- Hardware interrupt capability reduces CPU load by eliminating the need for continuous polling.
- TTL-level compatibility ensures low power consumption and high signal integrity.
Limitations:
- ISA bus interface limits compatibility to legacy or industrial PC systems with ISA slots.
- TTL logic levels restrict direct interfacing with higher-voltage industrial signals without external conditioning.
8. Standards & Compliance
The AX5224 adheres to standard PC ISA bus electrical and mechanical specifications, ensuring interoperability with compliant systems.
Compliance and Standards:
- Bus Standard: PC ISA (Industry Standard Architecture)
- Logic Standard: TTL (Transistor-Transistor Logic)
- Counter Standard: Intel 82C54-compatible programmable interval timer
- Electrical Safety: Designed to meet standard PC/industrial safety requirements
- EMC Compliance: Meets typical electromagnetic compatibility standards for ISA-based devices (when installed in compliant systems)
Regulatory Compliance:
- RoHS (Restriction of Hazardous Substances) compliance (depending on production batch)
- CE marking (for applicable regions)
9. Additional Information
Warranty:
Axiom typically provides a limited manufacturer’s warranty covering defects in materials and workmanship for a specified period (commonly one year from the date of purchase). Warranty terms may vary by region or distributor.
Technical Support:
Axiom offers technical documentation, user manuals, and application notes to assist with installation, configuration, and programming. Support may include:
- Driver and software library downloads
- Example source code for counter and I/O operations
- Troubleshooting guides and FAQs
- Direct technical assistance via email or support portal
Maintenance:
The AX5224 requires minimal maintenance. Periodic inspection of connectors and contacts is recommended to ensure reliable electrical connections. The card should be operated within specified environmental conditions to maintain performance and longevity.
Firmware and Software Updates:
As an ISA-based hardware device, the AX5224 primarily relies on host-side software for configuration and control. Updates may include:
- Enhanced driver support for newer operating systems
- Improved diagnostic utilities
- Updated documentation and programming examples
Serviceability:
The card’s modular design allows for easy replacement or upgrade within compatible ISA systems. The integrated breadboard area provides flexibility for user modifications without affecting the core functionality.
Summary
The Axiom AX5224 24 TTL DIO Digital Input/Output PC ISA Card is a versatile and reliable solution for digital interfacing, timing, and control applications. With 24 TTL-compatible I/O channels, a 10 MHz oscillator, and three 16-bit programmable counters, it offers precise control and measurement capabilities for industrial automation, laboratory instrumentation, and embedded systems. Its interrupt generation, counter chaining, and onboard prototyping area make it a powerful tool for engineers and developers seeking a customizable and high-performance digital I/O interface within ISA-based computing environments.
Key Highlights:
- 24 TTL digital I/O channels with 24 mA sink current
- Integrated 10 MHz oscillator and interrupt generation
- Three 16-bit 82C54 counters (DC–10 MHz) with chaining support
- Breadboard area for custom circuit integration
- Dual connectors (50-pin + 20-pin) for flexible interfacing
- Compact 129 × 99 mm ISA card form factor
- Designed and manufactured by Axiom for industrial-grade reliability
Total Length: ~3,050 tokens (approx. 12,000 characters)
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