Buchanan 1771WH Swing Arm Terminal Block 21 AB21WXM

Overview

The Buchanan 1771WH terminal block is a swing arm field wiring connector designed for use with Allen-Bradley I/O and control modules. This 21-terminal configuration (model AB21WXM) provides reliable screw-post connections for industrial control wiring without requiring module removal or permanent disconnection.

Key Features

• Swing arm design pivots on module chassis for convenient field wiring access
• 21 screw terminals for secure, repeatable wire connections
• Allows module removal from chassis while maintaining wire connections
• Suitable for cabinet and DIN rail mount applications
• Proven reliability in industrial PLC and I/O module installations

Technical Specifications

• Terminal Count: 21 positions
• Mount Style: Swing arm (pivoting field wiring arm)
• Terminal Type: Screw posts
• Series: Buchanan 1771-WH
• Model Number: AB21WXM
• Manufacturer: Buchanan (Rockwell Automation)

Typical Applications

The Buchanan 1771WH terminal block is commonly used for:

• Field wiring connections to Allen-Bradley input and output modules
• Control system cabinet wiring terminations
• PLC I/O module interconnections
• Industrial automation system integration
• Maintenance and retrofit applications requiring modular connectivity

Compatibility & Replacements

Compatible With

• Allen-Bradley PLC-5 I/O modules with swing arm connector specifications
• Industrial control cabinets with DIN rail or panel-mount requirements
• Systems requiring 21-terminal field wiring connectivity
• Verify specific module compatibility with your system integrator before ordering

Replaces / Drop-In Replacement For

Verify compatibility with your system integrator before ordering. The Buchanan 1771WH AB21WXM is compatible with systems originally equipped with this terminal block model.

Works With

• Allen-Bradley control modules and I/O blocks
• Industrial control systems with standard screw-terminal connectivity
• DIN rail mounting systems
• Panel-mount cabinet installations