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The Allen-Bradley 1771-IDC is a sophisticated isolated AC/DC 120V input module designed for seamless integration with the PLC-5 systems, utilizing the 1771 Universal I/O structure. It is ideal for interfacing various ON/OFF devices like pushbuttons and limit switches with programmable controllers and supports environments with individual control transformers, such as motor control centers. Featuring input filtering to minimize voltage transient effects and shielded packaging for electrostatic protection, this module is powered through the 1771 chassis backplane, drawing 74mA and requiring consideration in the modules total power calculations. With CSA, UL, and CE certifications, this module operates reliably in temperatures ranging from 0 to 60 °C and humidity levels up to 95%, while its six LED status indicators ensure effortless monitoring and troubleshooting.