The Allen-Bradley 1747-L543 is a Rockwell Automation SLC 500 series processor known for its reliability and flexibility in industrial settings. It features a 64 KB battery-backed RAM, supports up to 4096 inputs/outputs, and works with RSLogix500 software. Ideal for modular applications, it boasts rapid scan times and DH+ communication. Manufacturer Rockwell Automation Brand Allen-Bradley Part Number/Catalog No. 1747-L542 Series SLC 500 Inputs 4096 Module Type SLC 5/04 Processor Outputs 4096 Programming software RSLogix500 software Analog I/O 480 Memory Up to 64 KB, Battery Backed-RAM Program Scan Time 0.9 ms/K User Memory 64,000 Words I/O Chassis 3 Chassis Module Slots 30 I/O Scan Time 0.225 milliseconds Communication Data Highway Plus (DH+), RS-232 Backup Memory 1747-M13 Operating Temperature 0 to 60 degrees Celsius Battery back-up memory Yes; 1747-BA UPC 10662468653036 UNSPSC 32151705