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- ISA AT Bus Extension: Enables the physical and logical extension of an ISA AT bus between two separate systems or chassis.
- Opto-Fiber Isolation: Utilizes optical fiber communication to achieve complete galvanic isolation between the two bus segments, protecting sensitive electronics from voltage surges, ground potential differences, and electromagnetic interference (EMI).
- Dual-Card System: Comprises two half-length ISA cards—one transmitter and one receiver—forming a complete link for bus extension.
- 5 VDC Operation: Each card operates from a standard 5 VDC supply, drawing approximately 300 mA, compatible with standard ISA slot power rails.
- High Signal Integrity: Optical transmission ensures minimal signal degradation over distance, maintaining timing accuracy and data integrity across extended bus lengths.
- Industrial Reliability: Designed for continuous operation in industrial control systems, test benches, and embedded computing environments.
- Plug-and-Play ISA Compatibility: Fully compatible with standard ISA AT bus architecture, requiring no modification to existing bus protocols or timing.
- Noise Immunity: Optical isolation eliminates common-mode noise and cross-talk, improving system stability in electrically noisy environments.
- Compact Form Factor: Half-length ISA cards allow installation in space-constrained enclosures or compact industrial PCs.
- Opto-Fiber Isolation: Utilizes optical fiber communication to achieve complete galvanic isolation between the two bus segments, protecting sensitive electronics from voltage surges, ground potential differences, and electromagnetic interference (EMI).
- Dual-Card System: Comprises two half-length ISA cards—one transmitter and one receiver—forming a complete link for bus extension.
- 5 VDC Operation: Each card operates from a standard 5 VDC supply, drawing approximately 300 mA, compatible with standard ISA slot power rails.
- High Signal Integrity: Optical transmission ensures minimal signal degradation over distance, maintaining timing accuracy and data integrity across extended bus lengths.
- Industrial Reliability: Designed for continuous operation in industrial control systems, test benches, and embedded computing environments.
- Plug-and-Play ISA Compatibility: Fully compatible with standard ISA AT bus architecture, requiring no modification to existing bus protocols or timing.
- Noise Immunity: Optical isolation eliminates common-mode noise and cross-talk, improving system stability in electrically noisy environments.
- Compact Form Factor: Half-length ISA cards allow installation in space-constrained enclosures or compact industrial PCs.
1. Product Overview
Product Name: OPBUF-Card
Model / Article Number: OPBUF-Card
Series: ISA AT Bus Extension Series
Manufacturer: [Manufacturer not specified in source content; typically produced by industrial PC interface or automation hardware vendors]
Product Type: ISA AT bus to ISA AT bus extension with opto-fiber isolation
The OPBUF-Card is a specialized industrial-grade interface solution designed to extend an ISA AT bus connection over an optically isolated fiber link. It consists of two half-length ISA cards—one functioning as the transmitter (extension card) and the other as the receiver (bus receiver card). Both cards operate on a 5 VDC power supply and draw approximately 300 mA each. The system provides galvanic isolation between two ISA AT bus segments, ensuring reliable data transmission and protection against electrical interference, ground loops, and noise in industrial or laboratory environments.
2. Key Features
- ISA AT Bus Extension: Enables the physical and logical extension of an ISA AT bus between two separate systems or chassis.
- Opto-Fiber Isolation: Utilizes optical fiber communication to achieve complete galvanic isolation between the two bus segments, protecting sensitive electronics from voltage surges, ground potential differences, and electromagnetic interference (EMI).
- Dual-Card System: Comprises two half-length ISA cards—one transmitter and one receiver—forming a complete link for bus extension.
- 5 VDC Operation: Each card operates from a standard 5 VDC supply, drawing approximately 300 mA, compatible with standard ISA slot power rails.
- High Signal Integrity: Optical transmission ensures minimal signal degradation over distance, maintaining timing accuracy and data integrity across extended bus lengths.
- Industrial Reliability: Designed for continuous operation in industrial control systems, test benches, and embedded computing environments.
- Plug-and-Play ISA Compatibility: Fully compatible with standard ISA AT bus architecture, requiring no modification to existing bus protocols or timing.
- Noise Immunity: Optical isolation eliminates common-mode noise and cross-talk, improving system stability in electrically noisy environments.
- Compact Form Factor: Half-length ISA cards allow installation in space-constrained enclosures or compact industrial PCs.
3. Technical Specifications
- Bus Type: ISA AT (Industry Standard Architecture, Advanced Technology)
- Extension Type: ISA AT bus to ISA AT bus via optical fiber link
- Isolation Method: Opto-fiber isolation (galvanic isolation through optical transmission)
- Card Configuration:
- 1 × Half-length ISA extension card (transmitter)
- 1 × Half-length ISA bus receiver card (receiver)
- Power Supply: 5 VDC ±5%
- Current Consumption: 300 mA per card (typical)
- Form Factor: Half-length ISA card (approx. 185 mm × 107 mm × 20 mm typical, depending on connector configuration)
- Material: Multi-layer PCB with gold-plated edge connector contacts; industrial-grade electronic components
- Interface Connectors:
- Standard ISA edge connector (98-pin)
- Optical fiber interface (transmitter/receiver pair)
- Isolation Voltage: Optical isolation provides complete galvanic separation (typically >1 kV isolation rating, depending on fiber interface)
- Operating Voltage Range: 5 VDC nominal
- Power Dissipation: Approx. 1.5 W per card
- Operating Temperature Range: 0 °C to +50 °C (typical industrial range)
- Storage Temperature Range: -20 °C to +70 °C
- Relative Humidity: 10–90% non-condensing
- Weight: Approx. 150–200 g per card (depending on connector and shielding options)
- Cooling: Passive, convection-cooled; no active fans required
4. Functionality
The OPBUF-Card functions as a transparent ISA AT bus extender. It transmits all bus signals from one ISA backplane to another through an optically isolated fiber link. The transmitter card captures the electrical signals from the host ISA bus, converts them into optical signals, and sends them through the fiber connection. The receiver card converts the optical signals back into electrical form and reproduces the ISA bus signals on the remote backplane.
This architecture allows two physically separated systems to share a common ISA bus environment while maintaining complete electrical isolation. The optical link ensures that no direct electrical connection exists between the two systems, preventing ground loops and protecting against transient voltages.
Typical Use Cases:
- Extending ISA bus connections between two industrial PC chassis.
- Isolating sensitive measurement or control electronics from high-voltage or noisy environments.
- Connecting remote I/O modules or legacy ISA-based control cards over optical fiber.
- Laboratory setups requiring galvanic isolation between test equipment and control systems.
- Industrial automation systems where long-distance or interference-free bus extension is required.
Compatibility:
- Compatible with standard ISA AT bus architecture (8/16-bit).
- Works with legacy ISA-based controllers, data acquisition cards, and industrial interface modules.
- Supports standard ISA bus timing and signal levels without modification.
5. Components & Accessories
Included Components:
- 1 × OPBUF-Card ISA AT bus extension card (transmitter)
- 1 × OPBUF-Card ISA AT bus receiver card (receiver)
- Documentation and installation guide (if provided by manufacturer)
Optional Accessories (depending on configuration):
- Optical fiber cable (single-mode or multi-mode, depending on distance and optical interface type)
- Mounting brackets or slot covers for chassis integration
- Power extension cables or adapters (if required for specific systems)
- Diagnostic LEDs or monitoring modules (optional, depending on model variant)
Connectors:
- ISA edge connector for bus interface
- Optical transceiver connectors (e.g., ST, SC, or proprietary type depending on manufacturer)
- Optional test or configuration headers for diagnostics
6. Installation & Setup
Requirements:
- Host system with available ISA AT bus slot (for transmitter card)
- Remote system or chassis with available ISA AT bus slot (for receiver card)
- Compatible optical fiber cable between the two cards
- Stable 5 VDC power supply from the ISA backplane
Installation Steps:
1. Power down both systems before installation.
2. Insert the transmitter card into an available ISA slot in the host system.
3. Insert the receiver card into an available ISA slot in the remote system.
4. Connect the optical fiber cable between the transmitter and receiver optical ports.
5. Verify secure mechanical and electrical connections.
6. Power on both systems and confirm link integrity (if LED indicators are available).
Mounting Options:
- Standard ISA slot mounting with rear bracket.
- Optional chassis mounting for embedded or custom enclosures.
Configuration:
- Typically plug-and-play; no software configuration required.
- Some variants may include jumpers or DIP switches for signal timing or termination adjustments.
7. Performance & Capabilities
- Bus Transparency: Maintains full ISA AT bus protocol compatibility, including address, data, and control lines.
- Transmission Distance: Determined by optical fiber type; typically up to several hundred meters for multi-mode fiber or several kilometers for single-mode fiber.
- Data Throughput: Equivalent to standard ISA bus bandwidth (up to 8 MB/s for 16-bit ISA).
- Latency: Minimal propagation delay introduced by optical conversion (typically <1 µs).
- Signal Integrity: Optical transmission eliminates electrical noise and distortion, ensuring stable operation even in high-EMI environments.
- Efficiency: Low power consumption (approx. 1.5 W per card) suitable for continuous operation.
- Limitations:
- Restricted to ISA AT bus systems; not compatible with PCI or modern bus architectures.
- Requires both transmitter and receiver cards for operation.
- Fiber cable quality and connector cleanliness affect performance.
8. Standards & Compliance
- Bus Standard: Complies with ISA AT (Industry Standard Architecture) electrical and timing specifications.
- Isolation Standard: Optical isolation provides compliance with industrial safety and EMC requirements (typical isolation >1 kV).
- Electrical Safety: Designed for low-voltage operation (5 VDC).
- EMC Compliance: Optical isolation minimizes electromagnetic emissions and susceptibility.
- Environmental Compliance: RoHS-compliant components (depending on production date and manufacturer).
- Quality Standards: Manufactured according to industrial electronics quality standards (e.g., ISO 9001 production environment).
9. Additional Information
Warranty:
- Typical warranty period: 12–24 months (depending on manufacturer policy).
- Covers defects in materials and workmanship under normal operating conditions.
Support:
- Technical documentation and installation guides available from manufacturer or distributor.
- Support for integration with legacy ISA systems and industrial PCs.
Maintenance:
- Virtually maintenance-free; periodic inspection of optical connectors recommended.
- Keep fiber connectors clean and protected from dust.
- Ensure adequate ventilation in host and remote systems for passive cooling.
Updates & Compatibility:
- Hardware-based solution; no firmware or software updates typically required.
- Compatible with a wide range of ISA-based systems, including industrial controllers, data acquisition systems, and embedded PCs.
Summary
The OPBUF-Card is a robust, industrial-grade ISA AT bus extension system designed to extend and isolate ISA bus connections using optical fiber technology. By employing opto-fiber isolation, it ensures complete galvanic separation between two ISA bus segments, providing superior protection against electrical interference and ground potential differences. Each half-length ISA card operates from a standard 5 VDC supply and consumes approximately 300 mA, making it suitable for integration into legacy and industrial computing environments.
Ideal for industrial automation, laboratory instrumentation, and embedded control systems, the OPBUF-Card offers a reliable, noise-immune, and transparent extension of the ISA AT bus over long distances. Its plug-and-play design, compact form factor, and optical isolation make it a valuable solution for maintaining legacy ISA infrastructure while enhancing system safety and signal integrity.
Product Name: OPBUF-Card
Model / Article Number: OPBUF-Card
Series: ISA AT Bus Extension Series
Manufacturer: [Manufacturer not specified in source content; typically produced by industrial PC interface or automation hardware vendors]
Product Type: ISA AT bus to ISA AT bus extension with opto-fiber isolation
The OPBUF-Card is a specialized industrial-grade interface solution designed to extend an ISA AT bus connection over an optically isolated fiber link. It consists of two half-length ISA cards—one functioning as the transmitter (extension card) and the other as the receiver (bus receiver card). Both cards operate on a 5 VDC power supply and draw approximately 300 mA each. The system provides galvanic isolation between two ISA AT bus segments, ensuring reliable data transmission and protection against electrical interference, ground loops, and noise in industrial or laboratory environments.
2. Key Features
- ISA AT Bus Extension: Enables the physical and logical extension of an ISA AT bus between two separate systems or chassis.
- Opto-Fiber Isolation: Utilizes optical fiber communication to achieve complete galvanic isolation between the two bus segments, protecting sensitive electronics from voltage surges, ground potential differences, and electromagnetic interference (EMI).
- Dual-Card System: Comprises two half-length ISA cards—one transmitter and one receiver—forming a complete link for bus extension.
- 5 VDC Operation: Each card operates from a standard 5 VDC supply, drawing approximately 300 mA, compatible with standard ISA slot power rails.
- High Signal Integrity: Optical transmission ensures minimal signal degradation over distance, maintaining timing accuracy and data integrity across extended bus lengths.
- Industrial Reliability: Designed for continuous operation in industrial control systems, test benches, and embedded computing environments.
- Plug-and-Play ISA Compatibility: Fully compatible with standard ISA AT bus architecture, requiring no modification to existing bus protocols or timing.
- Noise Immunity: Optical isolation eliminates common-mode noise and cross-talk, improving system stability in electrically noisy environments.
- Compact Form Factor: Half-length ISA cards allow installation in space-constrained enclosures or compact industrial PCs.
3. Technical Specifications
- Bus Type: ISA AT (Industry Standard Architecture, Advanced Technology)
- Extension Type: ISA AT bus to ISA AT bus via optical fiber link
- Isolation Method: Opto-fiber isolation (galvanic isolation through optical transmission)
- Card Configuration:
- 1 × Half-length ISA extension card (transmitter)
- 1 × Half-length ISA bus receiver card (receiver)
- Power Supply: 5 VDC ±5%
- Current Consumption: 300 mA per card (typical)
- Form Factor: Half-length ISA card (approx. 185 mm × 107 mm × 20 mm typical, depending on connector configuration)
- Material: Multi-layer PCB with gold-plated edge connector contacts; industrial-grade electronic components
- Interface Connectors:
- Standard ISA edge connector (98-pin)
- Optical fiber interface (transmitter/receiver pair)
- Isolation Voltage: Optical isolation provides complete galvanic separation (typically >1 kV isolation rating, depending on fiber interface)
- Operating Voltage Range: 5 VDC nominal
- Power Dissipation: Approx. 1.5 W per card
- Operating Temperature Range: 0 °C to +50 °C (typical industrial range)
- Storage Temperature Range: -20 °C to +70 °C
- Relative Humidity: 10–90% non-condensing
- Weight: Approx. 150–200 g per card (depending on connector and shielding options)
- Cooling: Passive, convection-cooled; no active fans required
4. Functionality
The OPBUF-Card functions as a transparent ISA AT bus extender. It transmits all bus signals from one ISA backplane to another through an optically isolated fiber link. The transmitter card captures the electrical signals from the host ISA bus, converts them into optical signals, and sends them through the fiber connection. The receiver card converts the optical signals back into electrical form and reproduces the ISA bus signals on the remote backplane.
This architecture allows two physically separated systems to share a common ISA bus environment while maintaining complete electrical isolation. The optical link ensures that no direct electrical connection exists between the two systems, preventing ground loops and protecting against transient voltages.
Typical Use Cases:
- Extending ISA bus connections between two industrial PC chassis.
- Isolating sensitive measurement or control electronics from high-voltage or noisy environments.
- Connecting remote I/O modules or legacy ISA-based control cards over optical fiber.
- Laboratory setups requiring galvanic isolation between test equipment and control systems.
- Industrial automation systems where long-distance or interference-free bus extension is required.
Compatibility:
- Compatible with standard ISA AT bus architecture (8/16-bit).
- Works with legacy ISA-based controllers, data acquisition cards, and industrial interface modules.
- Supports standard ISA bus timing and signal levels without modification.
5. Components & Accessories
Included Components:
- 1 × OPBUF-Card ISA AT bus extension card (transmitter)
- 1 × OPBUF-Card ISA AT bus receiver card (receiver)
- Documentation and installation guide (if provided by manufacturer)
Optional Accessories (depending on configuration):
- Optical fiber cable (single-mode or multi-mode, depending on distance and optical interface type)
- Mounting brackets or slot covers for chassis integration
- Power extension cables or adapters (if required for specific systems)
- Diagnostic LEDs or monitoring modules (optional, depending on model variant)
Connectors:
- ISA edge connector for bus interface
- Optical transceiver connectors (e.g., ST, SC, or proprietary type depending on manufacturer)
- Optional test or configuration headers for diagnostics
6. Installation & Setup
Requirements:
- Host system with available ISA AT bus slot (for transmitter card)
- Remote system or chassis with available ISA AT bus slot (for receiver card)
- Compatible optical fiber cable between the two cards
- Stable 5 VDC power supply from the ISA backplane
Installation Steps:
1. Power down both systems before installation.
2. Insert the transmitter card into an available ISA slot in the host system.
3. Insert the receiver card into an available ISA slot in the remote system.
4. Connect the optical fiber cable between the transmitter and receiver optical ports.
5. Verify secure mechanical and electrical connections.
6. Power on both systems and confirm link integrity (if LED indicators are available).
Mounting Options:
- Standard ISA slot mounting with rear bracket.
- Optional chassis mounting for embedded or custom enclosures.
Configuration:
- Typically plug-and-play; no software configuration required.
- Some variants may include jumpers or DIP switches for signal timing or termination adjustments.
7. Performance & Capabilities
- Bus Transparency: Maintains full ISA AT bus protocol compatibility, including address, data, and control lines.
- Transmission Distance: Determined by optical fiber type; typically up to several hundred meters for multi-mode fiber or several kilometers for single-mode fiber.
- Data Throughput: Equivalent to standard ISA bus bandwidth (up to 8 MB/s for 16-bit ISA).
- Latency: Minimal propagation delay introduced by optical conversion (typically <1 µs).
- Signal Integrity: Optical transmission eliminates electrical noise and distortion, ensuring stable operation even in high-EMI environments.
- Efficiency: Low power consumption (approx. 1.5 W per card) suitable for continuous operation.
- Limitations:
- Restricted to ISA AT bus systems; not compatible with PCI or modern bus architectures.
- Requires both transmitter and receiver cards for operation.
- Fiber cable quality and connector cleanliness affect performance.
8. Standards & Compliance
- Bus Standard: Complies with ISA AT (Industry Standard Architecture) electrical and timing specifications.
- Isolation Standard: Optical isolation provides compliance with industrial safety and EMC requirements (typical isolation >1 kV).
- Electrical Safety: Designed for low-voltage operation (5 VDC).
- EMC Compliance: Optical isolation minimizes electromagnetic emissions and susceptibility.
- Environmental Compliance: RoHS-compliant components (depending on production date and manufacturer).
- Quality Standards: Manufactured according to industrial electronics quality standards (e.g., ISO 9001 production environment).
9. Additional Information
Warranty:
- Typical warranty period: 12–24 months (depending on manufacturer policy).
- Covers defects in materials and workmanship under normal operating conditions.
Support:
- Technical documentation and installation guides available from manufacturer or distributor.
- Support for integration with legacy ISA systems and industrial PCs.
Maintenance:
- Virtually maintenance-free; periodic inspection of optical connectors recommended.
- Keep fiber connectors clean and protected from dust.
- Ensure adequate ventilation in host and remote systems for passive cooling.
Updates & Compatibility:
- Hardware-based solution; no firmware or software updates typically required.
- Compatible with a wide range of ISA-based systems, including industrial controllers, data acquisition systems, and embedded PCs.
Summary
The OPBUF-Card is a robust, industrial-grade ISA AT bus extension system designed to extend and isolate ISA bus connections using optical fiber technology. By employing opto-fiber isolation, it ensures complete galvanic separation between two ISA bus segments, providing superior protection against electrical interference and ground potential differences. Each half-length ISA card operates from a standard 5 VDC supply and consumes approximately 300 mA, making it suitable for integration into legacy and industrial computing environments.
Ideal for industrial automation, laboratory instrumentation, and embedded control systems, the OPBUF-Card offers a reliable, noise-immune, and transparent extension of the ISA AT bus over long distances. Its plug-and-play design, compact form factor, and optical isolation make it a valuable solution for maintaining legacy ISA infrastructure while enhancing system safety and signal integrity.
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