Overview
The Allen-Bradley 1771-WC is a field wiring swing arm terminal block designed for the PLC-5 series automation platform. This passive interconnection component provides a flexible mounting solution that allows field wiring to connect to 1771 I/O modules without requiring removal of module connectors. The unit pivots on the chassis frame for convenient wire termination and module serviceability.
Key Features
- 10 Gold-Plated Terminals: All terminals are gold-plated for enhanced electrical performance and corrosion resistance
- 8 I/O Points Capacity: Supports 8 I/O points for discrete signal routing
- Durable Thermoplastic Construction: Uses thermoplastic material with conformal coating for environmental protection
- Power-Free Operation: Does not require an external power source
- Flexible Wiring Support: Accommodates wires such as AWG 14 spade-lugged or directly clamped to the wiring arm
- PLC-5 Compatible: Available from the Allen-Bradley PLC 5 series and the Bulletin 1771 product line
Technical Specifications
- Part Number: 1771-WC Series B
- Manufacturer: Allen-Bradley (Rockwell Automation)
- Terminal Count: 10 gold-plated
- I/O Capacity: 8 points maximum
- Material: Thermoplastic with conformal coating
- Wire Gauge Support: AWG 14
- Connection Method: Spade-lug or direct clamp
- Weight per Unit: 0.1 lbs (0.045 kg)
- Dimensions: 4.5 x 12.4 x 6.3 inches
- Power Required: None (passive component)
- Mounting: Swing arm (pivoting) on PLC-5 chassis
- Product Status: Discontinued by manufacturer
- Quantity in Lot: 3 units
Typical Applications
This wiring arm provides an easy and flexible interconnection between Allen-Bradley I/O modules specifically 1771 modules and plant wiring. Common uses include:
- Legacy PLC-5 automation system upgrades and maintenance
- Field wiring termination for discrete I/O in industrial control panels
- TTL low-current sensor and actuator interfacing
- Plant floor signal routing without requiring module removal during troubleshooting
Compatibility & Replacements
The 1771-WC field wiring arm is designed for use with TTL low current I/O modules. This wiring arm is compatible with all standard 1771 series input and output modules in the PLC-5 platform. The product has been discontinued by the manufacturer, making used units the primary source for legacy system support. Similar swing arm models in the 1771 series include the 1771-WA, 1771-WB, and 1771-WG, which offer varying terminal and I/O configurations. This lot of 3 units is ideal for redundancy or multi-axis control panel applications requiring field wiring flexibility.
