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The Allen-Bradley 1747-L20C is a robust fixed hardware controller from the SLC 500 series, featuring twelve 24VDC sink inputs and eight AC/DC relay outputs for versatile industrial applications. Ideal for high-speed counting, it operates on a 120/240VAC power supply and holds a 1K instruction capacity with rapid 8 millisecond scan rates per 1K, also accommodating EEPROM or UVPROM memory backup. Engineered for durability, the 1747-L20C is equipped with a 30 Amperes inrush current rating, complies with NEMA ICS 2-230 noise immunity standards, and maintains performance across a wide operational temperature range, facilitating reliable use in demanding manufacturing environments.