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The Allen-Bradley 1771-LC3 is a sophisticated loop controller designed to enhance continuous process automation within industrial environments. Compatible with Allen-Bradley PLC 5 devices, it operates on a robust 120 Volts AC, utilizing a microprocessor-based system for diverse application needs. The controller includes an intuitive operator interface with eight user-configurable keys, resistance temperature detector input, and LED indicators for operational status. Capable of handling binary and BCD data, it offers precise control with features such as 50-segment bar graph displays, PID parameter examination, and built-in diagnostics for error detection. This reliable component ensures efficient monitoring and control at temperatures up to 55 degrees Celsius.