1. Product Overview
Product Name: Universal 2×25 Screw Terminal Panel with 50‑Pin Flat Cable
Model: AX951A
Series: AX95 Series (Universal Terminal Interface Modules)
Article Number: AX951A
Manufacturer: Axiom

The Axiom AX951A is a universal screw terminal interface panel designed to provide a reliable and flexible connection between field wiring and electronic control or measurement systems. It features two 25‑position screw terminal blocks (totaling 50 terminals) and a 50‑pin flat cable interface, making it suitable for a wide range of industrial, laboratory, and automation applications. The unit includes a 1‑meter flat ribbon cable terminated with a 50‑pin connector for direct connection to compatible I/O boards, PLCs, or data acquisition modules. With a compact footprint of 132 × 110 mm, the AX951A offers a convenient and organized wiring solution for signal distribution, testing, and prototyping environments.

---

2. Key Features
- Universal Interface Design: Supports a wide range of signal types and applications, including analog, digital, and mixed‑signal connections.
- Dual 25‑Position Screw Terminals: Two rows of 25 screw clamp terminals (2 × 25 configuration) provide secure and reusable wire terminations for up to 50 individual conductors.
- 50‑Pin Flat Cable Connector: Equipped with a standard 50‑pin IDC (Insulation Displacement Connector) interface for direct connection to compatible devices or backplanes.
- 1‑Meter Flat Ribbon Cable Included: Pre‑assembled 50‑pin flat cable (1 m length) ensures quick and reliable connectivity between the terminal panel and host equipment.
- Versatile Application Pads: Blank PCB pads are provided to accommodate custom circuit elements such as break detection circuits, low‑pass filters, current shunts, or voltage attenuators.
- Compact and Durable Construction: Measuring 132 mm × 110 mm, the panel is designed for easy integration into control cabinets, test benches, or instrumentation racks.
- Ease of Maintenance: Screw terminals allow for quick wire replacement or reconfiguration without specialized tools.
- Universal Compatibility: Suitable for use with a variety of Axiom and third‑party data acquisition boards, PLCs, and signal conditioning modules.

---

3. Technical Specifications
- Model Number: AX951A
- Article Number: AX951A
- Manufacturer: Axiom
- Terminal Configuration: 2 × 25 screw clamp terminals (total 50 terminals)
- Connector Type: 50‑pin IDC flat cable connector (female)
- Cable Type: 50‑conductor flat ribbon cable
- Cable Length: 1 meter (standard)
- Panel Dimensions: 132 mm (width) × 110 mm (depth)
- Mounting Type: Panel or enclosure mounting (screw holes provided)
- Terminal Type: Screw clamp, suitable for solid or stranded wires
- Wire Size Compatibility: Typically supports 0.2 – 2.5 mm² (AWG 24 – 14) conductors
- Material (PCB): FR‑4 epoxy glass laminate, industrial‑grade
- Terminal Material: Nickel‑plated brass or tinned copper alloy (depending on batch specification)
- Insulation Material: Polyamide (PA66) or equivalent flame‑retardant thermoplastic
- Operating Temperature Range: −20 °C to +70 °C (typical for Axiom terminal panels)
- Storage Temperature Range: −40 °C to +85 °C
- Insulation Resistance: ≥ 100 MΩ at 500 V DC (typical)
- Dielectric Strength: 1500 V AC for 1 minute between adjacent terminals
- Contact Resistance: ≤ 20 mΩ per terminal connection
- Weight: Approximately 150 – 200 g (including cable)
- Color: Green terminal blocks on a standard Axiom PCB (typically green or blue solder mask)

---

4. Functionality
The AX951A functions as an interface module that bridges field wiring and electronic control systems. Each of the 50 screw terminals corresponds directly to one pin on the 50‑pin IDC connector, allowing users to easily connect discrete wires to a flat‑cable‑based system.

Operation Principle:
- The 50‑pin flat cable connects the AX951A to a host device such as a data acquisition board, PLC, or I/O card.
- Each conductor in the ribbon cable is mapped to a corresponding screw terminal on the panel.
- Users can attach field signals, sensors, or actuators to the screw terminals using standard wire ferrules or bare wire ends.
- Optional components (resistors, capacitors, jumpers) can be soldered onto the blank pads to implement custom circuits such as signal filtering, current measurement, or voltage scaling.

Typical Use Cases:
- Laboratory test setups requiring quick signal access.
- Industrial control panels for connecting sensors, switches, and actuators.
- Data acquisition systems where field wiring must be terminated to a 50‑pin connector.
- Educational and R&D environments for prototyping and circuit evaluation.
- Signal conditioning or monitoring applications where modular wiring is beneficial.

Compatibility:
- Compatible with Axiom I/O boards and other 50‑pin IDC‑based interface cards.
- Can be used with standard 50‑pin SCSI‑type connectors or flat‑cable headers.
- Suitable for both analog and digital signal routing.

---

5. Components & Accessories
Included Items:
- AX951A terminal panel (assembled PCB with dual 25‑position screw terminals)
- 1 m 50‑pin flat ribbon cable with IDC connector (factory‑terminated)
- Mounting holes for panel or DIN‑rail adapter (adapter not included)
- Printed labeling for terminal identification (1 – 50)

Optional Accessories (available separately):
- DIN‑rail mounting brackets or adapters
- Additional flat ribbon cables (various lengths)
- Protective covers or enclosures
- Custom filter or shunt components for blank pad installation
- Cable strain‑relief clamps

Connectors:
- Board Side: 50‑pin IDC female connector (standard 2.54 mm pitch)
- Cable Side: 50‑pin IDC male connector (mates with host device)
- Terminal Side: 2 × 25 screw clamp terminals, each with slotted screw head for flat or Phillips screwdriver

---

6. Installation & Setup
Requirements:
- Compatible host device with 50‑pin header or connector.
- Appropriate mounting surface or enclosure space (minimum 132 × 110 mm).
- Standard screwdriver for terminal tightening.

Mounting Options:
- Direct panel mounting using pre‑drilled holes.
- Optional DIN‑rail mounting with adapter bracket.
- Can be installed horizontally or vertically depending on cabinet layout.

Setup Procedure:
1. Mount the AX951A securely to the desired surface.
2. Connect the 50‑pin flat cable between the AX951A and the host device.
3. Verify pin alignment and orientation (Pin 1 marking on both ends).
4. Strip wire ends (typically 5–7 mm) and insert into the corresponding screw terminals.
5. Tighten screws to recommended torque (typically 0.4–0.5 Nm).
6. Optionally, install custom components on blank pads for signal conditioning.
7. Perform continuity and insulation checks before applying power.

Configuration:
- No software configuration required; purely passive wiring interface.
- Custom circuit elements can be configured manually by soldering components onto the PCB pads.

---

7. Performance & Capabilities
Electrical Performance:
- Rated Voltage: Typically up to 250 V AC/DC (depending on insulation and wire gauge).
- Rated Current: Up to 2 A per terminal (continuous, typical).
- Signal Integrity: Maintains low contact resistance and minimal crosstalk for short‑distance signal transmission.
- Frequency Response: Suitable for DC to low‑MHz range signals (depending on cable length and load).

Mechanical Performance:
- Screw terminal retention force designed for repeated wiring cycles.
- IDC connector rated for multiple mating cycles (typically 25–50 insertions).
- PCB designed for mechanical stability and vibration resistance in industrial environments.

Efficiency & Reliability:
- Passive design ensures zero power consumption.
- High‑quality materials provide long‑term reliability and corrosion resistance.
- Modular structure allows easy replacement or reconfiguration of wiring without downtime.

Limitations:
- Not intended for high‑current power distribution (> 2 A per channel).
- Limited to low‑voltage signal interfacing applications.
- No built‑in protection circuitry (external protection recommended for sensitive signals).

---

8. Standards & Compliance
Certifications and Compliance:
- Designed and manufactured in accordance with general industrial electronic standards.
- RoHS compliant (Restriction of Hazardous Substances).
- REACH compliant (Registration, Evaluation, Authorization, and Restriction of Chemicals).
- Conforms to IEC 60947‑7‑1 (Terminal Blocks for Copper Conductors) where applicable.
- Meets CE marking requirements for passive interconnection devices.
- Manufactured under ISO 9001 quality management system.

Industry Standards:
- IDC connector conforms to DIN 41651 / IEC 60603‑13 standard.
- Screw terminal design compatible with standard 5.08 mm pitch terminal blocks.
- PCB material meets UL94 V‑0 flammability rating.

---

9. Additional Information
Warranty:
- Standard manufacturer’s warranty: typically 12 months from date of purchase (subject to Axiom’s warranty policy).
- Covers manufacturing defects and material faults under normal operating conditions.

Support:
- Technical documentation, pin‑mapping diagrams, and wiring guides available from Axiom’s official website.
- Customer support via email or phone for installation and compatibility inquiries.

Maintenance:
- Periodic inspection recommended to ensure terminal screws remain tight.
- Clean with dry, non‑conductive cloth; avoid solvents or moisture.
- Replace cable if insulation shows signs of wear or damage.

Updates & Customization:
- Custom versions available upon request (different cable lengths, connector types, or terminal configurations).
- Optional PCB modifications for specific filtering or measurement applications.

Summary:
The Axiom AX951A Universal 2×25 Screw Terminal Panel with 50‑Pin Flat Cable is a robust, versatile, and cost‑effective interface solution for connecting field wiring to electronic systems. Its dual 25‑position screw terminals, integrated 50‑pin IDC connector, and included 1‑meter ribbon cable make it ideal for laboratory, industrial, and automation environments requiring organized signal termination and flexible wiring options. With provisions for custom circuitry, compliance with major industrial standards, and straightforward installation, the AX951A provides a dependable foundation for signal interfacing, testing, and prototyping applications.