1. Product Overview
Product Name: 50-pin SCSI-II Cable
Model Number: ACL-10250-4
Series: ACL Series – SCSI-II Interconnect Cables
Article Number: ACL-10250-4
Manufacturer: ADLINK Technology Inc.

The ADLINK ACL-10250-4 is a high-quality, shielded 50-pin SCSI-II (Small Computer System Interface) cable designed for reliable, high-speed data transmission between SCSI-compatible devices. With a total length of 4 meters, this male-to-male cable provides robust connectivity for industrial, laboratory, and computing environments where stable, interference-free communication is essential. It is part of ADLINK’s ACL accessory line, engineered to complement ADLINK data acquisition, control, and computing systems, as well as other SCSI-II compliant hardware.

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2. Key Features
- SCSI-II Compatibility: Fully compliant with the SCSI-II (Small Computer System Interface, second generation) standard, supporting data transfer rates up to 10 MB/s (Fast SCSI).
- 50-Pin Male-to-Male Connectors: Equipped with two 50-pin male connectors, typically of the Centronics or Half-Pitch (HPDB50) type, ensuring compatibility with a wide range of SCSI-II devices and host adapters.
- Extended Length (4 meters): Provides a 4-meter connection distance, ideal for setups requiring flexible equipment placement without signal degradation.
- High Signal Integrity: Shielded cable construction minimizes electromagnetic interference (EMI) and crosstalk, ensuring stable and accurate data transmission.
- Durable Construction: Industrial-grade materials and robust connector housings designed for long-term reliability in demanding environments.
- Plug-and-Play Operation: No additional configuration required; simply connect between SCSI-II devices for immediate operation.
- Backward Compatibility: Supports legacy SCSI-I devices and forward-compatible with certain SCSI-III interfaces when used with appropriate adapters.
- Optimized for ADLINK Systems: Designed to integrate seamlessly with ADLINK DAQ, motion control, and industrial computing products that utilize SCSI-II interfaces.

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3. Technical Specifications
- Cable Type: SCSI-II (Small Computer System Interface, 50-pin)
- Connector Type: 50-pin male to 50-pin male
- Connector Style: Typically Half-Pitch (HPDB50) or Centronics 50-pin, depending on system configuration
- Number of Conductors: 50
- Cable Length: 4 meters (13.12 feet)
- Conductor Material: High-purity copper for optimal conductivity
- Insulation Material: PVC or equivalent industrial-grade insulation
- Shielding: Full foil and braid shielding for EMI/RFI protection
- Outer Jacket Material: Flexible, abrasion-resistant PVC jacket
- Color: Standard black or gray (depending on production batch)
- Cable Diameter: Approximately 8–10 mm (typical for 50-conductor shielded cable)
- Operating Temperature Range: -20°C to +75°C (typical)
- Storage Temperature Range: -40°C to +85°C
- Weight: Approximately 0.5–0.8 kg (depending on connector type and shielding density)
- Impedance: 90 ± 10 ohms (typical for SCSI-II differential signaling)
- Maximum Data Transfer Rate: Up to 10 MB/s (Fast SCSI)
- Compliance: Meets SCSI-II electrical and mechanical interface specifications

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4. Functionality
The ACL-10250-4 functions as a high-performance interconnect cable for SCSI-II devices, enabling parallel data communication between host controllers and peripheral devices such as data acquisition modules, external drives, scanners, or industrial control units.

How It Works:
SCSI-II cables transmit data through 50 parallel signal lines, including control, data, and ground lines. The cable’s shielding and impedance control ensure signal integrity across the 4-meter length, minimizing reflections and noise. The male-to-male configuration allows direct connection between two female SCSI-II ports, typically found on host adapters and peripheral devices.

Use Cases and Applications:
- Industrial automation systems requiring reliable data transfer between controllers and I/O modules
- Laboratory instrumentation setups connecting data acquisition hardware to host PCs
- Legacy computing environments maintaining SCSI-based storage or measurement systems
- Embedded systems integration where SCSI-II interfaces are used for high-speed peripheral communication
- Test and measurement equipment interconnection in R&D facilities

Compatibility:
- Compatible with SCSI-II compliant devices and host adapters
- Backward compatible with SCSI-I devices (with appropriate termination)
- Can interface with SCSI-III or Ultra SCSI devices using suitable adapters
- Fully compatible with ADLINK DAQ and motion control cards featuring SCSI-II connectors

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5. Components & Accessories
Included Items:
- 1 × ADLINK ACL-10250-4 SCSI-II 50-pin male-to-male cable (4 meters)

Optional Accessories (sold separately):
- SCSI-II terminators (active or passive) for proper bus termination
- SCSI-II to SCSI-III adapter cables or converters
- Mounting clips or cable management accessories for rack or panel installations
- Replacement connector covers and dust caps

Connectors:
- Two 50-pin male connectors with locking mechanisms (thumbscrews or clip locks)
- Gold-plated contacts for corrosion resistance and low contact resistance
- Molded strain relief at each connector end to prevent cable fatigue

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6. Installation & Setup
Requirements:
- Devices with compatible 50-pin SCSI-II female connectors
- Proper SCSI bus termination at both ends of the chain
- Host adapter or controller supporting SCSI-II signaling

Mounting Options:
- Direct plug-in connection between devices
- Can be routed through cable trays, racks, or conduits in industrial environments
- Recommended to avoid sharp bends (minimum bend radius: 10 × cable diameter)

Configuration Steps:
1. Power off all devices before connecting the cable.
2. Connect one male end of the ACL-10250-4 to the host adapter’s SCSI-II port.
3. Connect the other end to the target device’s SCSI-II port.
4. Ensure proper termination at the end of the SCSI chain.
5. Power on devices and verify recognition by the host system.

Best Practices:
- Maintain total SCSI cable length within standard limits (typically ≤6 meters for SCSI-II).
- Avoid routing near high-voltage or high-frequency cables to minimize interference.
- Secure cable ends to prevent accidental disconnection.

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7. Performance & Capabilities
Speed and Data Transfer:
- Supports SCSI-II Fast mode with data transfer rates up to 10 MB/s.
- Maintains signal integrity across 4 meters through impedance-controlled design.

Capacity and Efficiency:
- Capable of supporting multiple devices on a single SCSI bus (up to 8 devices including the host).
- Efficient parallel data transmission with minimal latency.

Signal Quality:
- Shielded construction reduces EMI and crosstalk.
- Gold-plated contacts ensure consistent electrical performance over repeated insertions.

Limitations:
- Designed for SCSI-II; may not support Ultra320 or later SCSI standards without adapters.
- Maximum recommended cable length for optimal performance is 6 meters total per SCSI chain.
- Requires proper termination to prevent signal reflections.

Reliability:
- Tested for mechanical durability and electrical continuity.
- Suitable for continuous operation in industrial and laboratory environments.

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8. Standards & Compliance
Industry Standards:
- Complies with ANSI X3.131-1994 (SCSI-2) standard.
- Meets EIA/TIA-232 and related electrical interface guidelines for signal integrity.
- Designed according to ISO/IEC 9316-1 SCSI physical layer specifications.

Regulatory Compliance:
- RoHS compliant (Restriction of Hazardous Substances Directive).
- REACH compliant for material safety.
- CE marked for conformity with European safety and EMC requirements.
- UL recognized components for insulation and flammability ratings.

Quality Assurance:
- Manufactured under ISO 9001:2015 certified quality management system.
- 100% continuity and insulation resistance tested before shipment.

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9. Additional Information
Warranty:
- Standard manufacturer’s warranty (typically 1 year) covering defects in materials and workmanship.

Support:
- Technical support available through ADLINK’s global service network.
- Online documentation and compatibility guides provided by ADLINK.

Maintenance:
- Periodic inspection recommended to ensure connector cleanliness and cable integrity.
- Clean connectors with non-abrasive, lint-free materials.
- Store in a dry, dust-free environment when not in use.

Updates and Replacements:
- Replacement cables and alternative lengths available (e.g., ACL-10250-1, ACL-10250-2, ACL-10250-6).
- Compatible with future ADLINK products maintaining SCSI-II interface standards.

Environmental Considerations:
- Designed for long service life, reducing electronic waste.
- Materials selected for recyclability and compliance with environmental directives.

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Summary:
The ADLINK ACL-10250-4 50-pin SCSI-II Cable (4m) is a robust, high-performance interconnect solution engineered for reliable data communication in industrial, laboratory, and computing environments. Its 4-meter length, shielded construction, and precision 50-pin male connectors ensure stable, interference-free operation across a wide range of SCSI-II applications. Fully compliant with ANSI SCSI-II standards and manufactured under strict quality control, the ACL-10250-4 delivers dependable performance, long-term durability, and seamless integration with ADLINK and third-party SCSI-compatible systems.

This cable is ideal for users requiring extended reach, superior signal integrity, and proven compatibility in mission-critical data acquisition, control, and storage applications.