Overview
The Allen-Bradley 1771-WD field wiring arm is a modular terminal connector for PLC-5 series automation systems. This 12-terminal wiring arm attaches directly to 1771 I/O chassis modules, providing secure screw-terminal connections for field wiring in industrial control applications. The pivoting design allows technicians to install, remove, or service modules without disturbing main system wiring—essential for reducing downtime during maintenance and troubleshooting.
Key Features
- 12 Tin-Plated Terminals: Tin plated contacts resist corrosion and ensure reliable electrical connection across voltage ranges.
- Pivot-Arm Construction: Designed to pivot upwards to connect to a module and to allow the module to be installed or removed without disconnecting all the system wires.
- No External Power Required: Conformally coated and does not need external power.
- Secure Torque Spec: Supports a screw torque of between 7 and 9 pounds on an inch.
- Thermoplastic Construction: Durable, compact design rated for industrial environments.
- 8 Maximum I/O Points: Maximum Number of I/O: 8 with flexible terminal configurations.
Technical Specifications
- Number of Terminals: 12
- Terminal Type: Screw clamp
- Plating: Tin-plated
- Material: Thermoplastic
- Maximum I/O Points: 8
- External Power Required: No
- Conformal Coating: Yes
- Screw Torque Range: 7–9 in-lbs
- Maximum Wire Gauge: 14 AWG
- Standards: UL, KC
- Series: PLC-5 / Bulletin 1771
Typical Applications
- PLC-5 automation control systems
- Industrial machinery input/output wiring
- Process control and discrete I/O interfacing
- Maintenance and field service replacements
- General-purpose 120 VAC/DC control circuits
- Machine tool and assembly line control cabinets
Compatibility & Replacements
Compatible With
- 1771-ID, 1771-IDO1, 1771-OD, 1771-ODZ, 1771-OR, 1771-OW, 1771-OYL, and 1771-OZL input and output modules
- All 1771 I/O chassis units
- PLC-5 series controllers
- 1771 bulletin I/O systems
Replaces / Drop-In Replacement For
- Original equipment 1771-WD field wiring arms on legacy PLC-5 systems
- Failed or damaged wiring terminals in existing 1771 I/O racks
Works With
- PLC-5 programming and runtime environments
- RSLogix 500 legacy system configuration
- Bulletin 1771 I/O module families
- Any 1771-compatible I/O module supporting AC/DC general-purpose control signals
