Overview
The Allen-Bradley 1771-WF field wiring arm is a terminal block interface designed for PLC-5 series I/O modules. This lot contains 2 used units that provide flexible, secure wiring connections between field devices and Allen-Bradley 1771 I/O modules. The conformal coating protects against moisture and chemical exposure in harsh industrial environments.
Key Features
- 8 I/O points with 18 gold-plated terminals for reliable signal integrity
- Conformal coating for chemical and moisture protection
- Thermoplastic construction ensures durability in control cabinet installations
- Compatible with direct clamp or spade-lug wire connections (AWG 14)
- No external power required—passive terminal distribution
- Compact form factor fits standard DIN-rail and panel-mount configurations
Technical Specifications
- I/O Capacity: 8 points
- Terminals: 18 (gold-plated)
- Weight: 0.2 lbs (0.1 kg) per unit
- Dimensions: 4.5 Ă— 12.4 Ă— 6.3 inches (115 Ă— 317 Ă— 160 mm)
- Material: Thermoplastic with conformal coating
- Wire Gauge Support: AWG 14
- Connection Type: Spade-lug or direct clamp
- Series: PLC-5 (legacy)
- Condition: Used
Typical Applications
The 1771-WF field wiring arm is commonly deployed in:
- Legacy PLC-5 control system upgrades and maintenance
- Retrofit installations where existing I/O modules remain in service
- Manufacturing equipment with distributed I/O wiring harnesses
- HVAC, pump, and motor control panels requiring modular terminal blocks
- Food processing, chemical, and automotive assembly line controls
Compatibility & Replacements
The 1771-WF is designed specifically for Allen-Bradley PLC-5 I/O modules and integrates directly with existing 1771 series hardware. This wiring arm is a passive terminal distribution device and does not require firmware or configuration. For systems using CompactLogix or ControlLogix controllers, modern Ethernet I/O alternatives such as the 1756-MODULE series may be considered; however, the 1771-WF remains the correct drop-in replacement for legacy PLC-5 installations. Related models include the 1771-WC (10-terminal TTL variant) and 1771-WB field wiring arms.
