Overview
The Allen-Bradley 1771-WH is a PLC-5 field wiring arm designed as a terminal interface for Allen-Bradley 1771 series input/output modules. This swing-arm wiring terminal assembly features 21 screw terminals with gold contact plating and supports up to 16 I/O points, enabling flexible field wiring connections without disconnecting wires during module maintenance or replacement.
Key Features
- 21 Gold-Plated Terminals — Corrosion-resistant contacts ensure reliable long-term electrical connections in industrial environments
- Swing-Arm Design — Allows quick module removal and replacement without breaking field wiring connections
- 16 I/O Point Capacity — Supports standard digital and discrete I/O configurations in PLC-5 systems
- Thermoplastic Housing with Conformal Coating — Protects against moisture and environmental corrosion
- No External Power Required — Passive interface arm simplifies installation and reduces power demand
Technical Specifications
- Part Number: 1771-WH
- Manufacturer: Allen-Bradley / Rockwell Automation
- Product Type: Field Wiring Arm / Terminal Interface
- Terminals: 21 (gold-plated contact surfaces)
- I/O Points: 16 maximum
- Contact Material: Gold-plated terminals
- Housing Material: Thermoplastic with conformal coating
- Dimensions: 4.5 × 12.4 × 6.3 inches (115 × 317 × 160 mm)
- Weight: 0.2 lbs (0.1 kg)
- Power Supply: Not required (passive interface)
- Compatible Series: PLC-5
Typical Applications
- Industrial automation control panel wiring and termination
- PLC-5 system I/O module field connections
- Discrete input and output wiring for on/off sensors and actuators
- Modular control system expansion and maintenance
- Retrofit projects requiring quick module replacement without downtime
Compatibility & Replacements
Compatible With
- Allen-Bradley 1771 series I/O modules (digital input/output)
- 1771-IAD (AC/DC Digital Input Module)
- 1771-OAD (Output Module)
- PLC-5 universal I/O chassis (1771-A1B through A4B and later)
- Allen-Bradley 1771-AM1 and 1771-AM2 chassis
- Modules requiring ½, 1, and 2-slot I/O addressing
Replaces / Drop-In Replacement For
- Original equipment wiring arms on legacy PLC-5 systems
- Damaged or worn 1771 series field wiring terminals
- Verify compatibility with your specific module type before ordering
Works With
- Allen-Bradley PLC-5 programmable logic controllers
- Rockwell Automation legacy automation systems
- Studio 5000 (for programming PLC-5 environments)
- Discrete 24 VDC, 120 VAC, and 125 VDC field devices
- Standard screw-terminal field wiring (14 AWG stranded wire recommended)
