Allen-Bradley 1771-WI Field Wiring Arm

The Allen-Bradley 1771-WI Field Wiring Arm is a 1771‑series field wiring accessory designed for PLC‑5 remote I/O modules, providing a dedicated terminal interface for routing field conductors to a 1771 I/O module. It serves as the wiring interface between field devices and the backplane, helping to organize conductors inside control panels and ensuring secure, strain‑relieved connections. In Allen‑Bradley installation literature, the 1771‑WI is described as the Field Wiring Arm for 1771 modules, with screw torque guidance specified for the wiring arm screws at 7–9 inch‑pounds. This accessory is typically used in panel installations to terminate and route field signals to 1771 I/O modules, supporting reliable wiring discipline and serviceability in industrial control systems.