The Allen-Bradley 1747-L20R is a 20-channel fixed I/O processor module from the SLC 500 series, designed for basic industrial automation control applications. This 1747-L20R module features 12 AC inputs and 8 AC/DC relay outputs, but it does not support user power or include a high-speed counter device. The module’s power ratings are 0.35 Watts per I/O point, with a minimum of 10.5 Watts and a maximum of 16 Watts. The 1747-L20R fixed I/O processor module operates at temperatures from 0 to 60 °C and can be stored at -40 to 85 °C, ensuring reliable performance in a variety of industrial environments.