Allen-Bradley 1771-WN Field Wiring Arm

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Allen-Bradley 1771-WN Field Wiring Arm

1. Product Description

The 1771-WN is a 40-pin field wiring arm designed for Allen-Bradley PLC-5 and Bulletin 1771 series I/O modules. It provides a secure interface for connecting field wiring to digital I/O modules (e.g., 1771-OZL, 1771-ODZ, 1771-ID) in industrial automation systems. The wiring arm allows modules to be installed or removed without disconnecting all system wires, improving maintenance efficiency .

2. Key Features

1. Tool-less Installation – Uses a pivoting arm mechanism to swing into place and lock onto the module, simplifying wiring changes .

2. Hot-Swappable (RIUP) – Enables module replacement without system shutdown .

3. High Current Capacity – Supports 7–9 lb-in torque on screw terminals for secure connections .

4. Industrial Durability – Features a conformal coating for protection against dust and moisture .

5. Compatibility – Works with:

   • 1771-OZL (digital contact output)

   • 1771-ODZ (digital AC output)

   • 1771-ID (AC/DC input modules) .

3. Technical Specifications

4. Applications

• Manufacturing Automation – Connects sensors/actuators in PLC-5-based systems .

• Process Control – Interfaces with valves and pumps in chemical plants .

• Legacy System Maintenance – Facilitates wiring updates in older 1771-series installations .

5. Installation & Precautions

1. Power Disconnection – Always disconnect power before wiring to prevent arcing .

2. Wire Management – Avoid overloading terminals; use auxiliary terminal blocks for multiple connections .

3. Environmental Limits – Do not exceed 60°C ambient temperature .

Procurement & Additional Notes

• Availability:

  • eBay: ~$20.24 CAD (used) with international shipping .

  • Domestic Suppliers: Check local distributors for new units (e.g., JDZJ.com) .

• Replacement: If unavailable, verify compatibility with 1771-WH/WHF variants .

The structure and details of the product：

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