Allen-Bradley 1771-WA 10-Terminal Field Wiring Arm for 1771 Modules

Product Overview

Allen-Bradley 1771-WA is the standard 10-terminal field wiring arm used with many 1771 digital I/O modules. It pivots on the chassis and allows the module to be removed or replaced without disconnecting field wiring.

Technical Specs

• Type: Field wiring arm / swing arm
• Terminals: 10
• Compatible modules: Many 8-point digital I/O modules (e.g. 1771-OB, IA, IB series)
• Contact plating: Tin / gold combination typical
• Wire size: Up to 14 AWG class
• System: 1771 chassis

Key Features

• Enables module replacement without rewiring
• Pivoting design for convenient access
• Standard accessory shipped with many 1771 modules
• Reliable field termination for discrete I/O

FAQ

• Terminals? 10.
• Purpose? Field wiring interface for 1771 modules.
• Benefit? Module can be swapped without disconnecting wires.

Installation Guide

1. Attach the wiring arm to the horizontal bar at the bottom of the 1771 chassis.
2. Wire field devices to the screw terminals.
3. Swing the arm up to engage the module terminals.
4. Ensure locking pins engage properly.
5. Label terminals for future maintenance.

Selection Tips

• Confirm the module requires a 1771-WA (some modules use different arms or RTPs).
• Keep spare wiring arms for critical I/O points.
• Essential accessory for rapid module replacement in 1771 systems.