Allen-Bradley | 1771-WA | PLC-5 Field Wiring Arm

Product Overview

The 1771-WA is a field wiring arm designed for use with the Allen-Bradley PLC-5 series of programmable controller modules. It provides a secure and organized interface between field devices and I/O modules, allowing for quick installation, maintenance, and reliable signal transmission. With ten terminal points and compatibility for both AC and DC voltage ranges, the 1771-WA offers flexibility for a wide range of general-purpose industrial applications.

Key Features

• Brand: Allen-Bradley

• Model: 1771-WA

• Product Type: Field Wiring Arm

• Series: PLC-5

• Number of I/O Channels: Supports up to 8 input/output connections

• Number of Terminals: 10 terminal points

• Contact Plating: 9 tin-plated contacts and 1 gold-plated contact for signal reliability

• Screw Torque: 7–9 lb·in for secure wire fastening

• Voltage Compatibility: Suitable for 24–220 V AC/DC applications

• External Power Requirement: None

• Typical AC Signal Delay (Off): 29 ±8 ms

• Typical DC Signal Delay (Off): 30 ±7 ms

• Coating: Conformal coating for protection against moisture and dust

• Wiring Arm Accessory: Compatible with 1771-WN modules

• Weight: 0.09 kg (0.19 lbs)

• Category: PLC Accessories

Application Scenarios

The 1771-WA is commonly used in:

• Process automation systems: For quick wiring connections between sensors, actuators, and PLC modules

• Machine control panels: Providing structured and reliable wiring management

• Maintenance operations: Allowing easy module replacement without rewiring

• Legacy Allen-Bradley PLC-5 systems: Supporting continued use of existing infrastructure

Performance and Construction

• Durability: Built with high-grade materials for long-term reliability in industrial settings

• Electrical Performance: Stable contact resistance ensures consistent signal integrity

• Ease of Installation: Plug-in design reduces wiring time and minimizes downtime during maintenance

Compatibility

• System Integration: Designed for the Allen-Bradley PLC-5 family and related 1771-series I/O modules

• Field Wiring Support: Works with modules requiring 8-point I/O interface via 10-terminal connection

• Companion Accessory: Recommended for use with 1771-WN field wiring components

FAQs

Q: What is the main function of the 1771-WA?
A: It serves as a removable wiring arm that connects field wiring to PLC-5 I/O modules, simplifying installation and maintenance.

Q: Can the 1771-WA handle both AC and DC signals?
A: Yes, it supports general-purpose voltages ranging from 24 V to 220 V AC/DC.

Q: Does it require external power?
A: No, it operates passively without the need for external power.

Q: What modules are compatible with the 1771-WA?
A: It is designed for use with Allen-Bradley PLC-5 series modules that utilize 8 I/O channels.

Q: How many terminals are included in this wiring arm?
A: It includes 10 terminals—9 tin-plated and 1 gold-plated for enhanced conductivity.