Overview
The Allen-Bradley 1771-WH is part of the PLC-5 series field wiring swing arm designed to simplify I/O wiring and maintenance in industrial control systems. Manufactured by Allen-Bradley/Rockwell Automation, it is made of durable thermoplastic material with conformal coating that protects it from corrosion and moisture. The arm pivots on the chassis to connect with the terminals on the front of the module, allowing the module to be removed from the chassis without disconnecting wiring.
Key Features
- 21 terminals with tin plating for reliable electrical connections and corrosion resistance
- Screw torque of 7-9 lb*in provides secure terminal connections and stable signal transmission
- Requires no external power to operate
- Conformal coating provides protection against environmental factors, ensuring durability in harsh operating conditions
- Engineered for general-purpose applications, offering flexibility in diverse industrial environments
- Pivoting design eliminates the need to break wiring connections during module service
Technical Specifications
- Terminal Count: 21 terminals with 16 I/O points
- AC signal delay: 29 (±8) ms
- DC signal delay: 30 (±7) ms
- Terminal Material: Tin-plated
- Screw Torque: 7–9 lb·in
- Dimensions: 4.5 × 12.4 × 6.3 inches (115 × 317 × 160 mm)
- Housing Material: Durable thermoplastic
- Coating: Conformal
- Power Requirement: None (passive terminal arm)
Typical Applications
The 1771-WH is well-suited for:
- PLC-5 control system field wiring and terminal connectivity
- Industrial machinery control and automation
- Facility environments where frequent module maintenance is required
- Food, beverage, pharmaceutical, and manufacturing environments requiring corrosion protection
- Control cabinet installations with space constraints
Compatibility & Replacements
Compatible With
- Allen-Bradley/Rockwell Automation 1771-OAD output module
- PLC-5 series I/O modules
- Allen-Bradley 1771 series I/O applications
Replaces / Drop-In Replacement For
- Original Allen-Bradley 1771-WH units
- Verify compatibility with your system integrator before ordering for specific model cross-references
Works With
- PLC-5 family controllers (SLC-5, CompactLogix where 1771 adapters are used)
- Industrial wiring and terminal block applications
- Field I/O termination in legacy and new control installations
