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- 4 ISA Expansion Slots: Supports up to four ISA interface cards, enabling flexible system expansion for industrial control, data acquisition, and legacy hardware integration.
- 4-Layer PCB Design: The multilayer printed circuit board enhances signal integrity, reduces electromagnetic interference (EMI), and ensures stable power distribution across all slots.
- Passive Backplane Architecture: No active components or logic circuitry; relies on the CPU card or single-board computer (SBC) for bus control, ensuring high reliability and minimal failure points.
- Compact Form Factor: Measuring only 170 mm x 90 mm, the AP-SL04 is suitable for compact enclosures, embedded systems, and rack-mounted industrial PCs.
- ISA Bus Compatibility: Fully compliant with the ISA bus standard, supporting 8-bit and 16-bit ISA cards.
- Industrial Reliability: Designed for continuous operation in industrial environments, offering robust mechanical construction and stable electrical performance.
- Ease of Integration: Standardized slot spacing and connector layout allow seamless integration with existing ISA-based systems and chassis.
- Optimized Signal Routing: The 4-layer PCB structure provides dedicated layers for power and ground planes, minimizing noise and crosstalk between signal traces.
- Legacy System Support: Ideal for maintaining or upgrading existing ISA-based systems without redesigning the entire platform.
- 4-Layer PCB Design: The multilayer printed circuit board enhances signal integrity, reduces electromagnetic interference (EMI), and ensures stable power distribution across all slots.
- Passive Backplane Architecture: No active components or logic circuitry; relies on the CPU card or single-board computer (SBC) for bus control, ensuring high reliability and minimal failure points.
- Compact Form Factor: Measuring only 170 mm x 90 mm, the AP-SL04 is suitable for compact enclosures, embedded systems, and rack-mounted industrial PCs.
- ISA Bus Compatibility: Fully compliant with the ISA bus standard, supporting 8-bit and 16-bit ISA cards.
- Industrial Reliability: Designed for continuous operation in industrial environments, offering robust mechanical construction and stable electrical performance.
- Ease of Integration: Standardized slot spacing and connector layout allow seamless integration with existing ISA-based systems and chassis.
- Optimized Signal Routing: The 4-layer PCB structure provides dedicated layers for power and ground planes, minimizing noise and crosstalk between signal traces.
- Legacy System Support: Ideal for maintaining or upgrading existing ISA-based systems without redesigning the entire platform.
1. Product Overview
Product Name: 4-Slot 4-Layer Passive Backplane (ISA Bus)
Model: AP-SL04
Series: AP-SL Series – Industrial Passive Backplane Systems
Article Number: AP-SL04
Manufacturer: [Manufacturer not specified – typically used in industrial computing and embedded system integration environments]
The AP-SL04 is a compact, industrial-grade 4-slot, 4-layer passive backplane designed for systems utilizing the ISA (Industry Standard Architecture) bus. It provides a stable and reliable platform for legacy and embedded computing applications that require ISA expansion slots for add-on cards, control modules, or interface boards. With a physical footprint of 170 mm x 90 mm, the AP-SL04 is optimized for small form factor industrial PCs, embedded controllers, and automation systems where space efficiency and signal integrity are critical.
2. Key Features
- 4 ISA Expansion Slots: Supports up to four ISA interface cards, enabling flexible system expansion for industrial control, data acquisition, and legacy hardware integration.
- 4-Layer PCB Design: The multilayer printed circuit board enhances signal integrity, reduces electromagnetic interference (EMI), and ensures stable power distribution across all slots.
- Passive Backplane Architecture: No active components or logic circuitry; relies on the CPU card or single-board computer (SBC) for bus control, ensuring high reliability and minimal failure points.
- Compact Form Factor: Measuring only 170 mm x 90 mm, the AP-SL04 is suitable for compact enclosures, embedded systems, and rack-mounted industrial PCs.
- ISA Bus Compatibility: Fully compliant with the ISA bus standard, supporting 8-bit and 16-bit ISA cards.
- Industrial Reliability: Designed for continuous operation in industrial environments, offering robust mechanical construction and stable electrical performance.
- Ease of Integration: Standardized slot spacing and connector layout allow seamless integration with existing ISA-based systems and chassis.
- Optimized Signal Routing: The 4-layer PCB structure provides dedicated layers for power and ground planes, minimizing noise and crosstalk between signal traces.
- Legacy System Support: Ideal for maintaining or upgrading existing ISA-based systems without redesigning the entire platform.
3. Technical Specifications
- Model: AP-SL04
- Bus Type: ISA (Industry Standard Architecture)
- Number of Slots: 4
- PCB Layers: 4 layers (signal, power, and ground planes for improved stability)
- Dimensions: 170 mm (length) × 90 mm (width)
- Form Factor: Compact industrial backplane
- Material: High-quality FR-4 PCB substrate with multi-layer copper traces
- Connector Type: Standard ISA edge connectors (gold-plated contacts for durability and conductivity)
- Operating Voltage: Derived from system power supply via SBC or power distribution connector (typically +5V, ±12V, -5V as per ISA standard)
- Operating Temperature Range: Typically 0°C to 60°C (depending on system configuration and enclosure ventilation)
- Storage Temperature Range: -20°C to 85°C
- Relative Humidity: 5% to 95% non-condensing
- Weight: Approximately 150–200 g (depending on connector configuration)
- Mounting Holes: Pre-drilled for chassis or enclosure mounting
- PCB Thickness: Approximately 1.6 mm
- Signal Integrity: Controlled impedance routing for ISA bus lines
- Compliance: Conforms to ISA electrical and mechanical specifications
4. Functionality
The AP-SL04 functions as a passive interconnect platform that distributes the ISA bus signals from a CPU card or single-board computer (SBC) to multiple peripheral cards. It does not contain any active logic or processing components; instead, it serves as a signal and power distribution medium.
How It Works:
- The CPU card or SBC plugs into one of the ISA slots or a dedicated system connector.
- The backplane routes the ISA bus signals (address, data, control, and power lines) to the remaining slots.
- Peripheral ISA cards (such as I/O controllers, communication interfaces, or data acquisition modules) connect to the other slots.
- The backplane ensures consistent electrical connectivity and mechanical alignment between all installed cards.
Use Cases and Applications:
- Industrial automation controllers and PLC systems
- Legacy equipment maintenance and upgrades
- Data acquisition and measurement systems
- Machine control and process monitoring
- Embedded computing platforms requiring ISA expansion
- Laboratory instrumentation and test systems
- Custom-built industrial PCs with ISA interface requirements
Compatibility:
- Compatible with standard ISA cards (8-bit and 16-bit)
- Works with industrial SBCs and CPU cards that provide ISA bus signals
- Suitable for integration into industrial chassis, rackmount enclosures, or custom-built embedded systems
5. Components & Accessories
Included Items:
- AP-SL04 4-slot passive backplane (main unit)
- Mounting holes and alignment guides integrated into PCB
- Gold-plated ISA connectors for reliable contact
Optional Accessories (depending on system configuration):
- Power cables or harnesses for +5V, ±12V, and -5V supply lines
- Chassis mounting brackets or standoffs
- Ribbon cables or adapters for connecting to SBCs
- Cooling fans or airflow guides (recommended for enclosed systems)
- Protective covers or dust shields for unused slots
Connectors:
- 4 × ISA edge connectors (standard 98-pin configuration for 16-bit ISA)
- Power input connector (if applicable, depending on system design)
- Grounding points for chassis connection
6. Installation & Setup
Requirements:
- Compatible SBC or CPU card with ISA bus interface
- Power supply capable of providing standard ISA voltages (+5V, ±12V, -5V)
- Enclosure or chassis with sufficient space (minimum 170 mm × 90 mm footprint)
Mounting Options:
- Direct mounting to chassis base using pre-drilled holes
- Installation in rackmount or desktop industrial PC enclosures
- Vertical or horizontal orientation depending on airflow and mechanical design
Configuration Steps:
1. Power off the system and disconnect all power sources.
2. Secure the AP-SL04 backplane to the chassis using screws or standoffs.
3. Insert the CPU card or SBC into the designated ISA slot.
4. Install peripheral ISA cards into the remaining slots, ensuring proper alignment.
5. Connect the system power supply to the backplane (if required).
6. Verify all connections and ensure that no pins are bent or misaligned.
7. Power on the system and confirm that all installed cards are recognized and functioning.
Best Practices:
- Maintain proper grounding between the backplane and chassis to minimize electrical noise.
- Ensure adequate ventilation to prevent overheating of installed cards.
- Use anti-static precautions when handling the backplane and expansion cards.
7. Performance & Capabilities
Bus Performance:
- Supports standard ISA bus data transfer rates (8 MHz clock frequency, 8/16-bit data width).
- Provides stable signal propagation across all four slots due to optimized 4-layer PCB design.
- Maintains low signal attenuation and minimal crosstalk between adjacent traces.
Capacity:
- Accommodates up to four ISA expansion cards simultaneously.
- Supports both full-length and half-length ISA cards (depending on chassis design).
Efficiency:
- Passive design ensures zero power consumption by the backplane itself.
- Efficient power distribution through dedicated power planes reduces voltage drop across slots.
Limitations:
- Limited to ISA bus performance (not suitable for PCI, PCIe, or modern high-speed interfaces).
- Dependent on the CPU card or SBC for bus control and timing signals.
- Designed primarily for legacy and industrial applications rather than consumer PCs.
8. Standards & Compliance
- Bus Standard: Fully compliant with ISA (Industry Standard Architecture) electrical and mechanical specifications.
- PCB Manufacturing Standards: Conforms to IPC-A-600 and IPC-6012 Class 2 or higher for industrial-grade PCB fabrication.
- RoHS Compliance: Manufactured using lead-free materials and processes (RoHS compliant).
- EMC Considerations: 4-layer design minimizes electromagnetic interference and ensures compliance with typical industrial EMC requirements.
- Safety Standards: Designed to meet general industrial safety and reliability standards (specific certifications may vary by manufacturer).
9. Additional Information
Warranty:
- Typically covered by a 1-year limited warranty against manufacturing defects (actual terms depend on supplier or manufacturer).
Support:
- Technical documentation, pinout diagrams, and installation guides available from the manufacturer or distributor.
- Customer support for integration, troubleshooting, and compatibility inquiries.
Maintenance:
- Minimal maintenance required due to passive design.
- Periodic inspection recommended to ensure connectors remain clean and free of oxidation.
- Avoid exposure to excessive dust, moisture, or vibration.
Updates & Longevity:
- The AP-SL04 is designed for long-term availability to support legacy ISA-based systems.
- No firmware or software updates required (purely hardware-based).
- Compatible with a wide range of existing ISA cards, ensuring continued usability in industrial and embedded environments.
Summary:
The AP-SL04 4-Slot 4-Layer Passive Backplane is a robust, compact, and reliable solution for industrial and embedded systems requiring ISA bus expansion. Its 4-layer PCB design ensures superior signal integrity and power stability, while the passive architecture guarantees long-term reliability with zero maintenance overhead. Measuring just 170 mm × 90 mm, it fits easily into compact enclosures and supports up to four ISA cards, making it ideal for legacy system maintenance, industrial automation, and embedded control applications.
Engineered for durability and compliance with ISA standards, the AP-SL04 provides a dependable foundation for extending the life and functionality of ISA-based computing platforms in demanding industrial environments.
Product Name: 4-Slot 4-Layer Passive Backplane (ISA Bus)
Model: AP-SL04
Series: AP-SL Series – Industrial Passive Backplane Systems
Article Number: AP-SL04
Manufacturer: [Manufacturer not specified – typically used in industrial computing and embedded system integration environments]
The AP-SL04 is a compact, industrial-grade 4-slot, 4-layer passive backplane designed for systems utilizing the ISA (Industry Standard Architecture) bus. It provides a stable and reliable platform for legacy and embedded computing applications that require ISA expansion slots for add-on cards, control modules, or interface boards. With a physical footprint of 170 mm x 90 mm, the AP-SL04 is optimized for small form factor industrial PCs, embedded controllers, and automation systems where space efficiency and signal integrity are critical.
2. Key Features
- 4 ISA Expansion Slots: Supports up to four ISA interface cards, enabling flexible system expansion for industrial control, data acquisition, and legacy hardware integration.
- 4-Layer PCB Design: The multilayer printed circuit board enhances signal integrity, reduces electromagnetic interference (EMI), and ensures stable power distribution across all slots.
- Passive Backplane Architecture: No active components or logic circuitry; relies on the CPU card or single-board computer (SBC) for bus control, ensuring high reliability and minimal failure points.
- Compact Form Factor: Measuring only 170 mm x 90 mm, the AP-SL04 is suitable for compact enclosures, embedded systems, and rack-mounted industrial PCs.
- ISA Bus Compatibility: Fully compliant with the ISA bus standard, supporting 8-bit and 16-bit ISA cards.
- Industrial Reliability: Designed for continuous operation in industrial environments, offering robust mechanical construction and stable electrical performance.
- Ease of Integration: Standardized slot spacing and connector layout allow seamless integration with existing ISA-based systems and chassis.
- Optimized Signal Routing: The 4-layer PCB structure provides dedicated layers for power and ground planes, minimizing noise and crosstalk between signal traces.
- Legacy System Support: Ideal for maintaining or upgrading existing ISA-based systems without redesigning the entire platform.
3. Technical Specifications
- Model: AP-SL04
- Bus Type: ISA (Industry Standard Architecture)
- Number of Slots: 4
- PCB Layers: 4 layers (signal, power, and ground planes for improved stability)
- Dimensions: 170 mm (length) × 90 mm (width)
- Form Factor: Compact industrial backplane
- Material: High-quality FR-4 PCB substrate with multi-layer copper traces
- Connector Type: Standard ISA edge connectors (gold-plated contacts for durability and conductivity)
- Operating Voltage: Derived from system power supply via SBC or power distribution connector (typically +5V, ±12V, -5V as per ISA standard)
- Operating Temperature Range: Typically 0°C to 60°C (depending on system configuration and enclosure ventilation)
- Storage Temperature Range: -20°C to 85°C
- Relative Humidity: 5% to 95% non-condensing
- Weight: Approximately 150–200 g (depending on connector configuration)
- Mounting Holes: Pre-drilled for chassis or enclosure mounting
- PCB Thickness: Approximately 1.6 mm
- Signal Integrity: Controlled impedance routing for ISA bus lines
- Compliance: Conforms to ISA electrical and mechanical specifications
4. Functionality
The AP-SL04 functions as a passive interconnect platform that distributes the ISA bus signals from a CPU card or single-board computer (SBC) to multiple peripheral cards. It does not contain any active logic or processing components; instead, it serves as a signal and power distribution medium.
How It Works:
- The CPU card or SBC plugs into one of the ISA slots or a dedicated system connector.
- The backplane routes the ISA bus signals (address, data, control, and power lines) to the remaining slots.
- Peripheral ISA cards (such as I/O controllers, communication interfaces, or data acquisition modules) connect to the other slots.
- The backplane ensures consistent electrical connectivity and mechanical alignment between all installed cards.
Use Cases and Applications:
- Industrial automation controllers and PLC systems
- Legacy equipment maintenance and upgrades
- Data acquisition and measurement systems
- Machine control and process monitoring
- Embedded computing platforms requiring ISA expansion
- Laboratory instrumentation and test systems
- Custom-built industrial PCs with ISA interface requirements
Compatibility:
- Compatible with standard ISA cards (8-bit and 16-bit)
- Works with industrial SBCs and CPU cards that provide ISA bus signals
- Suitable for integration into industrial chassis, rackmount enclosures, or custom-built embedded systems
5. Components & Accessories
Included Items:
- AP-SL04 4-slot passive backplane (main unit)
- Mounting holes and alignment guides integrated into PCB
- Gold-plated ISA connectors for reliable contact
Optional Accessories (depending on system configuration):
- Power cables or harnesses for +5V, ±12V, and -5V supply lines
- Chassis mounting brackets or standoffs
- Ribbon cables or adapters for connecting to SBCs
- Cooling fans or airflow guides (recommended for enclosed systems)
- Protective covers or dust shields for unused slots
Connectors:
- 4 × ISA edge connectors (standard 98-pin configuration for 16-bit ISA)
- Power input connector (if applicable, depending on system design)
- Grounding points for chassis connection
6. Installation & Setup
Requirements:
- Compatible SBC or CPU card with ISA bus interface
- Power supply capable of providing standard ISA voltages (+5V, ±12V, -5V)
- Enclosure or chassis with sufficient space (minimum 170 mm × 90 mm footprint)
Mounting Options:
- Direct mounting to chassis base using pre-drilled holes
- Installation in rackmount or desktop industrial PC enclosures
- Vertical or horizontal orientation depending on airflow and mechanical design
Configuration Steps:
1. Power off the system and disconnect all power sources.
2. Secure the AP-SL04 backplane to the chassis using screws or standoffs.
3. Insert the CPU card or SBC into the designated ISA slot.
4. Install peripheral ISA cards into the remaining slots, ensuring proper alignment.
5. Connect the system power supply to the backplane (if required).
6. Verify all connections and ensure that no pins are bent or misaligned.
7. Power on the system and confirm that all installed cards are recognized and functioning.
Best Practices:
- Maintain proper grounding between the backplane and chassis to minimize electrical noise.
- Ensure adequate ventilation to prevent overheating of installed cards.
- Use anti-static precautions when handling the backplane and expansion cards.
7. Performance & Capabilities
Bus Performance:
- Supports standard ISA bus data transfer rates (8 MHz clock frequency, 8/16-bit data width).
- Provides stable signal propagation across all four slots due to optimized 4-layer PCB design.
- Maintains low signal attenuation and minimal crosstalk between adjacent traces.
Capacity:
- Accommodates up to four ISA expansion cards simultaneously.
- Supports both full-length and half-length ISA cards (depending on chassis design).
Efficiency:
- Passive design ensures zero power consumption by the backplane itself.
- Efficient power distribution through dedicated power planes reduces voltage drop across slots.
Limitations:
- Limited to ISA bus performance (not suitable for PCI, PCIe, or modern high-speed interfaces).
- Dependent on the CPU card or SBC for bus control and timing signals.
- Designed primarily for legacy and industrial applications rather than consumer PCs.
8. Standards & Compliance
- Bus Standard: Fully compliant with ISA (Industry Standard Architecture) electrical and mechanical specifications.
- PCB Manufacturing Standards: Conforms to IPC-A-600 and IPC-6012 Class 2 or higher for industrial-grade PCB fabrication.
- RoHS Compliance: Manufactured using lead-free materials and processes (RoHS compliant).
- EMC Considerations: 4-layer design minimizes electromagnetic interference and ensures compliance with typical industrial EMC requirements.
- Safety Standards: Designed to meet general industrial safety and reliability standards (specific certifications may vary by manufacturer).
9. Additional Information
Warranty:
- Typically covered by a 1-year limited warranty against manufacturing defects (actual terms depend on supplier or manufacturer).
Support:
- Technical documentation, pinout diagrams, and installation guides available from the manufacturer or distributor.
- Customer support for integration, troubleshooting, and compatibility inquiries.
Maintenance:
- Minimal maintenance required due to passive design.
- Periodic inspection recommended to ensure connectors remain clean and free of oxidation.
- Avoid exposure to excessive dust, moisture, or vibration.
Updates & Longevity:
- The AP-SL04 is designed for long-term availability to support legacy ISA-based systems.
- No firmware or software updates required (purely hardware-based).
- Compatible with a wide range of existing ISA cards, ensuring continued usability in industrial and embedded environments.
Summary:
The AP-SL04 4-Slot 4-Layer Passive Backplane is a robust, compact, and reliable solution for industrial and embedded systems requiring ISA bus expansion. Its 4-layer PCB design ensures superior signal integrity and power stability, while the passive architecture guarantees long-term reliability with zero maintenance overhead. Measuring just 170 mm × 90 mm, it fits easily into compact enclosures and supports up to four ISA cards, making it ideal for legacy system maintenance, industrial automation, and embedded control applications.
Engineered for durability and compliance with ISA standards, the AP-SL04 provides a dependable foundation for extending the life and functionality of ISA-based computing platforms in demanding industrial environments.
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