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- 96 Digital I/O Channels: Provides a total of 96 TTL-level digital input/output lines for high-density signal interfacing.
- 8255 Mode 0 Emulation: Fully emulates the Intel 8255 PPI in Mode 0, ensuring compatibility with existing control software and hardware designed for 8255-based systems.
- ISA Bus Interface: Designed for the AT ISA bus, allowing integration into legacy and industrial PC platforms that still utilize ISA expansion slots.
- Interrupt Support: Supports IRQ2–IRQ15 for change-of-state interrupt generation, enabling event-driven digital input monitoring.
- Four 50-pin Connectors: Equipped with four standard 50-pin headers for easy connection to external devices, terminal boards, or signal conditioning modules.
- Half-Size Form Factor: Compact design suitable for systems with limited expansion space.
- Cross-Platform Driver Support: Includes driver support for both Windows and Unix operating systems, facilitating deployment in diverse software environments.
- TTL-Level I/O: Compatible with standard Transistor-Transistor Logic (TTL) voltage levels, ensuring reliable interfacing with a wide range of digital devices and sensors.
- Flexible Configuration: Each group of I/O lines can be configured as input or output, allowing versatile control and monitoring setups.
- Industrial Reliability: Designed for continuous operation in industrial automation, data acquisition, and process control applications.
- 8255 Mode 0 Emulation: Fully emulates the Intel 8255 PPI in Mode 0, ensuring compatibility with existing control software and hardware designed for 8255-based systems.
- ISA Bus Interface: Designed for the AT ISA bus, allowing integration into legacy and industrial PC platforms that still utilize ISA expansion slots.
- Interrupt Support: Supports IRQ2–IRQ15 for change-of-state interrupt generation, enabling event-driven digital input monitoring.
- Four 50-pin Connectors: Equipped with four standard 50-pin headers for easy connection to external devices, terminal boards, or signal conditioning modules.
- Half-Size Form Factor: Compact design suitable for systems with limited expansion space.
- Cross-Platform Driver Support: Includes driver support for both Windows and Unix operating systems, facilitating deployment in diverse software environments.
- TTL-Level I/O: Compatible with standard Transistor-Transistor Logic (TTL) voltage levels, ensuring reliable interfacing with a wide range of digital devices and sensors.
- Flexible Configuration: Each group of I/O lines can be configured as input or output, allowing versatile control and monitoring setups.
- Industrial Reliability: Designed for continuous operation in industrial automation, data acquisition, and process control applications.
1. Product Overview
Product Name: AX5215H
Model Number: AX5215H
Series: AX5000 Series Digital I/O Interface Cards
Article Number: AX5215H
Manufacturer: Axiom
The Axiom AX5215H is a high-density digital input/output (DIO) interface card designed for industrial and embedded computing systems utilizing the AT ISA bus architecture. It provides 96 channels of TTL-compatible digital I/O and is engineered to emulate the Intel 8255 Programmable Peripheral Interface (PPI) operating in Mode 0. This emulation ensures broad compatibility with legacy systems and software that rely on 8255-based I/O control. The AX5215H is a half-size ISA card, optimized for space-constrained industrial PCs and control systems, and is supported by both Windows and Unix drivers for flexible integration across multiple operating environments.
2. Key Features
- 96 Digital I/O Channels: Provides a total of 96 TTL-level digital input/output lines for high-density signal interfacing.
- 8255 Mode 0 Emulation: Fully emulates the Intel 8255 PPI in Mode 0, ensuring compatibility with existing control software and hardware designed for 8255-based systems.
- ISA Bus Interface: Designed for the AT ISA bus, allowing integration into legacy and industrial PC platforms that still utilize ISA expansion slots.
- Interrupt Support: Supports IRQ2–IRQ15 for change-of-state interrupt generation, enabling event-driven digital input monitoring.
- Four 50-pin Connectors: Equipped with four standard 50-pin headers for easy connection to external devices, terminal boards, or signal conditioning modules.
- Half-Size Form Factor: Compact design suitable for systems with limited expansion space.
- Cross-Platform Driver Support: Includes driver support for both Windows and Unix operating systems, facilitating deployment in diverse software environments.
- TTL-Level I/O: Compatible with standard Transistor-Transistor Logic (TTL) voltage levels, ensuring reliable interfacing with a wide range of digital devices and sensors.
- Flexible Configuration: Each group of I/O lines can be configured as input or output, allowing versatile control and monitoring setups.
- Industrial Reliability: Designed for continuous operation in industrial automation, data acquisition, and process control applications.
3. Technical Specifications
- Bus Interface: AT ISA bus
- Digital I/O Channels: 96 channels (TTL-level)
- I/O Configuration: Programmable as input or output in groups (emulating 8255 Mode 0 operation)
- Interrupt Lines: IRQ2 through IRQ15 selectable for change-of-state detection
- Connectors: 4 × 50-pin headers (standard IDC type)
- Logic Levels:
- Input high voltage (VIH): TTL compatible
- Input low voltage (VIL): TTL compatible
- Output high voltage (VOH): TTL compatible
- Output low voltage (VOL): TTL compatible
- Form Factor: Half-size ISA card
- Dimensions: Approximately 185 mm (L) × 100 mm (H) (typical half-size ISA dimensions)
- Weight: Approx. 150–200 g (depending on configuration)
- Power Requirements: +5 VDC from ISA bus (typical consumption < 500 mA)
- Operating Temperature: 0°C to 60°C (typical industrial range)
- Storage Temperature: -20°C to 85°C
- Humidity: 5% to 95% RH, non-condensing
- Material: Multi-layer PCB with gold-plated edge connector and high-reliability components
- Mounting: Standard ISA slot mounting with rear bracket for secure installation
4. Functionality
The AX5215H operates as a digital I/O interface card that connects directly to the ISA bus of an industrial PC. It provides 96 TTL-compatible digital lines that can be configured as inputs or outputs in groups, following the 8255 Mode 0 emulation scheme. In Mode 0, each group of 8-bit ports can be independently set as input or output, allowing flexible control of external devices such as relays, sensors, switches, and actuators.
Use Cases and Applications:
- Industrial automation and process control systems
- Data acquisition and monitoring applications
- Machine control and robotics interfaces
- Laboratory instrumentation and test benches
- Legacy system upgrades requiring ISA-based I/O expansion
- Digital signal monitoring and control in embedded systems
Compatibility:
- Compatible with standard AT ISA bus systems
- Software-compatible with applications designed for Intel 8255 Mode 0 operation
- Supported by Axiom-provided drivers for Windows and Unix environments
- Can interface with external terminal boards, relay modules, or custom wiring harnesses via 50-pin connectors
5. Components & Accessories
Included Items:
- AX5215H 96-channel DIO ISA card
- User manual and installation guide (digital or printed)
- Driver software package for Windows and Unix (on CD or downloadable)
Optional Accessories:
- 50-pin flat ribbon cables for external connections
- Terminal boards or breakout modules for easy wiring
- DIN-rail mounting accessories (for external terminal boards)
- Shielded cable assemblies for noise-sensitive environments
Connectors:
- Four 50-pin IDC headers, each providing 24 digital I/O lines (total 96 lines)
- Pin assignments compatible with standard 8255-style I/O mapping
- Connectors support direct attachment to Axiom or third-party terminal boards
6. Installation & Setup
System Requirements:
- PC or industrial computer with available ISA expansion slot
- Operating system: Windows or Unix (driver support provided)
- +5 VDC power supply from ISA bus
Installation Steps:
1. Power off the host system and disconnect it from the power source.
2. Insert the AX5215H card into an available ISA slot, ensuring proper alignment with the bus connector.
3. Secure the card using the mounting bracket screw.
4. Connect external devices or terminal boards to the 50-pin headers using appropriate cables.
5. Power on the system and install the provided driver software.
6. Configure the I/O settings and interrupt assignments using the driver utility or system BIOS (if applicable).
Configuration:
- I/O direction (input/output) is programmable via software.
- Interrupts can be enabled for specific channels or groups to detect state changes.
- The card’s emulation of 8255 Mode 0 ensures that existing 8255-compatible software can control the I/O without modification.
Mounting Options:
- Standard internal ISA slot mounting
- External cabling to terminal boards mounted on DIN rails or panels
7. Performance & Capabilities
Speed and Throughput:
- High-speed TTL I/O switching suitable for real-time control applications
- Typical I/O access time determined by ISA bus cycle (~1 µs per operation)
- Capable of handling rapid digital signal changes with interrupt-driven response
Capacity:
- 96 independent digital channels, configurable in groups
- Each channel can handle standard TTL logic levels (0–5 V)
Efficiency:
- Low power consumption due to efficient TTL circuitry
- Software-configurable I/O direction minimizes hardware reconfiguration time
Limitations:
- Restricted to ISA bus systems (not compatible with PCI or PCIe without adapter)
- TTL-level I/O only (no direct support for higher voltage or current loads without external drivers or relays)
- Limited to 8255 Mode 0 operation (no Mode 1 or Mode 2 support)
Reliability:
- Designed for continuous industrial operation
- Robust PCB design with gold-plated contacts for long-term durability
8. Standards & Compliance
Electrical and Interface Standards:
- Complies with AT ISA bus electrical and mechanical specifications
- TTL logic level compatibility (IEEE standard TTL voltage levels)
Regulatory Compliance:
- Designed to meet CE and FCC Class A requirements for industrial environments
- RoHS-compliant manufacturing (lead-free components and solder)
Industry Standards:
- 8255 PPI Mode 0 emulation standard
- Compatible with standard 50-pin IDC connector pinouts used in industrial I/O systems
Software Standards:
- Driver support for Windows and Unix ensures compliance with standard OS driver models
- API and library functions compatible with legacy 8255-based software frameworks
9. Additional Information
Warranty:
- Standard manufacturer’s warranty (typically 1–2 years, depending on region and distributor) covering defects in materials and workmanship
Technical Support:
- Axiom provides technical documentation, driver updates, and integration support
- Online resources include installation guides, sample code, and troubleshooting FAQs
Maintenance:
- No regular maintenance required beyond standard system care
- Periodic inspection of connectors and cables recommended for optimal signal integrity
Software Updates:
- Driver and utility updates available from Axiom’s official website
- Compatibility maintained with supported Windows and Unix versions
Service and Replacement:
- Replacement parts and RMA service available through authorized Axiom distributors
- Optional extended warranty and support contracts offered for industrial deployments
Summary
The Axiom AX5215H is a robust, high-density 96-channel digital I/O ISA card engineered for industrial and embedded control applications requiring reliable TTL-level interfacing. Its 8255 Mode 0 emulation ensures seamless integration with legacy systems, while IRQ2–IRQ15 interrupt support enables responsive event-driven control. The four 50-pin connectors provide flexible connectivity to external devices, and the half-size ISA form factor allows installation in compact industrial PCs. With cross-platform driver support for Windows and Unix, the AX5215H delivers a versatile, long-term solution for digital control, monitoring, and automation tasks in environments where ISA-based systems remain in operation.
Product Name: AX5215H
Model Number: AX5215H
Series: AX5000 Series Digital I/O Interface Cards
Article Number: AX5215H
Manufacturer: Axiom
The Axiom AX5215H is a high-density digital input/output (DIO) interface card designed for industrial and embedded computing systems utilizing the AT ISA bus architecture. It provides 96 channels of TTL-compatible digital I/O and is engineered to emulate the Intel 8255 Programmable Peripheral Interface (PPI) operating in Mode 0. This emulation ensures broad compatibility with legacy systems and software that rely on 8255-based I/O control. The AX5215H is a half-size ISA card, optimized for space-constrained industrial PCs and control systems, and is supported by both Windows and Unix drivers for flexible integration across multiple operating environments.
2. Key Features
- 96 Digital I/O Channels: Provides a total of 96 TTL-level digital input/output lines for high-density signal interfacing.
- 8255 Mode 0 Emulation: Fully emulates the Intel 8255 PPI in Mode 0, ensuring compatibility with existing control software and hardware designed for 8255-based systems.
- ISA Bus Interface: Designed for the AT ISA bus, allowing integration into legacy and industrial PC platforms that still utilize ISA expansion slots.
- Interrupt Support: Supports IRQ2–IRQ15 for change-of-state interrupt generation, enabling event-driven digital input monitoring.
- Four 50-pin Connectors: Equipped with four standard 50-pin headers for easy connection to external devices, terminal boards, or signal conditioning modules.
- Half-Size Form Factor: Compact design suitable for systems with limited expansion space.
- Cross-Platform Driver Support: Includes driver support for both Windows and Unix operating systems, facilitating deployment in diverse software environments.
- TTL-Level I/O: Compatible with standard Transistor-Transistor Logic (TTL) voltage levels, ensuring reliable interfacing with a wide range of digital devices and sensors.
- Flexible Configuration: Each group of I/O lines can be configured as input or output, allowing versatile control and monitoring setups.
- Industrial Reliability: Designed for continuous operation in industrial automation, data acquisition, and process control applications.
3. Technical Specifications
- Bus Interface: AT ISA bus
- Digital I/O Channels: 96 channels (TTL-level)
- I/O Configuration: Programmable as input or output in groups (emulating 8255 Mode 0 operation)
- Interrupt Lines: IRQ2 through IRQ15 selectable for change-of-state detection
- Connectors: 4 × 50-pin headers (standard IDC type)
- Logic Levels:
- Input high voltage (VIH): TTL compatible
- Input low voltage (VIL): TTL compatible
- Output high voltage (VOH): TTL compatible
- Output low voltage (VOL): TTL compatible
- Form Factor: Half-size ISA card
- Dimensions: Approximately 185 mm (L) × 100 mm (H) (typical half-size ISA dimensions)
- Weight: Approx. 150–200 g (depending on configuration)
- Power Requirements: +5 VDC from ISA bus (typical consumption < 500 mA)
- Operating Temperature: 0°C to 60°C (typical industrial range)
- Storage Temperature: -20°C to 85°C
- Humidity: 5% to 95% RH, non-condensing
- Material: Multi-layer PCB with gold-plated edge connector and high-reliability components
- Mounting: Standard ISA slot mounting with rear bracket for secure installation
4. Functionality
The AX5215H operates as a digital I/O interface card that connects directly to the ISA bus of an industrial PC. It provides 96 TTL-compatible digital lines that can be configured as inputs or outputs in groups, following the 8255 Mode 0 emulation scheme. In Mode 0, each group of 8-bit ports can be independently set as input or output, allowing flexible control of external devices such as relays, sensors, switches, and actuators.
Use Cases and Applications:
- Industrial automation and process control systems
- Data acquisition and monitoring applications
- Machine control and robotics interfaces
- Laboratory instrumentation and test benches
- Legacy system upgrades requiring ISA-based I/O expansion
- Digital signal monitoring and control in embedded systems
Compatibility:
- Compatible with standard AT ISA bus systems
- Software-compatible with applications designed for Intel 8255 Mode 0 operation
- Supported by Axiom-provided drivers for Windows and Unix environments
- Can interface with external terminal boards, relay modules, or custom wiring harnesses via 50-pin connectors
5. Components & Accessories
Included Items:
- AX5215H 96-channel DIO ISA card
- User manual and installation guide (digital or printed)
- Driver software package for Windows and Unix (on CD or downloadable)
Optional Accessories:
- 50-pin flat ribbon cables for external connections
- Terminal boards or breakout modules for easy wiring
- DIN-rail mounting accessories (for external terminal boards)
- Shielded cable assemblies for noise-sensitive environments
Connectors:
- Four 50-pin IDC headers, each providing 24 digital I/O lines (total 96 lines)
- Pin assignments compatible with standard 8255-style I/O mapping
- Connectors support direct attachment to Axiom or third-party terminal boards
6. Installation & Setup
System Requirements:
- PC or industrial computer with available ISA expansion slot
- Operating system: Windows or Unix (driver support provided)
- +5 VDC power supply from ISA bus
Installation Steps:
1. Power off the host system and disconnect it from the power source.
2. Insert the AX5215H card into an available ISA slot, ensuring proper alignment with the bus connector.
3. Secure the card using the mounting bracket screw.
4. Connect external devices or terminal boards to the 50-pin headers using appropriate cables.
5. Power on the system and install the provided driver software.
6. Configure the I/O settings and interrupt assignments using the driver utility or system BIOS (if applicable).
Configuration:
- I/O direction (input/output) is programmable via software.
- Interrupts can be enabled for specific channels or groups to detect state changes.
- The card’s emulation of 8255 Mode 0 ensures that existing 8255-compatible software can control the I/O without modification.
Mounting Options:
- Standard internal ISA slot mounting
- External cabling to terminal boards mounted on DIN rails or panels
7. Performance & Capabilities
Speed and Throughput:
- High-speed TTL I/O switching suitable for real-time control applications
- Typical I/O access time determined by ISA bus cycle (~1 µs per operation)
- Capable of handling rapid digital signal changes with interrupt-driven response
Capacity:
- 96 independent digital channels, configurable in groups
- Each channel can handle standard TTL logic levels (0–5 V)
Efficiency:
- Low power consumption due to efficient TTL circuitry
- Software-configurable I/O direction minimizes hardware reconfiguration time
Limitations:
- Restricted to ISA bus systems (not compatible with PCI or PCIe without adapter)
- TTL-level I/O only (no direct support for higher voltage or current loads without external drivers or relays)
- Limited to 8255 Mode 0 operation (no Mode 1 or Mode 2 support)
Reliability:
- Designed for continuous industrial operation
- Robust PCB design with gold-plated contacts for long-term durability
8. Standards & Compliance
Electrical and Interface Standards:
- Complies with AT ISA bus electrical and mechanical specifications
- TTL logic level compatibility (IEEE standard TTL voltage levels)
Regulatory Compliance:
- Designed to meet CE and FCC Class A requirements for industrial environments
- RoHS-compliant manufacturing (lead-free components and solder)
Industry Standards:
- 8255 PPI Mode 0 emulation standard
- Compatible with standard 50-pin IDC connector pinouts used in industrial I/O systems
Software Standards:
- Driver support for Windows and Unix ensures compliance with standard OS driver models
- API and library functions compatible with legacy 8255-based software frameworks
9. Additional Information
Warranty:
- Standard manufacturer’s warranty (typically 1–2 years, depending on region and distributor) covering defects in materials and workmanship
Technical Support:
- Axiom provides technical documentation, driver updates, and integration support
- Online resources include installation guides, sample code, and troubleshooting FAQs
Maintenance:
- No regular maintenance required beyond standard system care
- Periodic inspection of connectors and cables recommended for optimal signal integrity
Software Updates:
- Driver and utility updates available from Axiom’s official website
- Compatibility maintained with supported Windows and Unix versions
Service and Replacement:
- Replacement parts and RMA service available through authorized Axiom distributors
- Optional extended warranty and support contracts offered for industrial deployments
Summary
The Axiom AX5215H is a robust, high-density 96-channel digital I/O ISA card engineered for industrial and embedded control applications requiring reliable TTL-level interfacing. Its 8255 Mode 0 emulation ensures seamless integration with legacy systems, while IRQ2–IRQ15 interrupt support enables responsive event-driven control. The four 50-pin connectors provide flexible connectivity to external devices, and the half-size ISA form factor allows installation in compact industrial PCs. With cross-platform driver support for Windows and Unix, the AX5215H delivers a versatile, long-term solution for digital control, monitoring, and automation tasks in environments where ISA-based systems remain in operation.
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