The Allen-Bradley 1747-L20B SLC 500 Fixed Controller is a compact, versatile unit offering 20 I/O points with twelve 120V AC inputs and eight Triac outputs. Designed to accommodate a robust electrical range of 120-240V AC, it supports an optional two-slot expansion chassis and provides reliable operation supported by a 5-year life lithium battery backed RAM with UVPROM or EEPROM backup options. The controller features a fast processor scan time of 8 milliseconds per 1K, standard LED status indicators, and is built to withstand operational shocks of 30G and vibrations of 2.5G, making it ideal for demanding environments. Certified to UL and CSA standards, it offers excellent noise immunity per NEMA ICS2-230, while ensuring a durable performance with Belden 9463 cable compatibility.
