The Allen-Bradley 1747-L553 by Industrial Automation is a high-performance SLC 5/05 Processor from the SLC 500 series. It boasts a substantial 64 KB memory, swift program scan time of 0.9 ms/K, and supports 4096 inputs and outputs. Both Ethernet and RS-232 communication options are available, and it uses RSLogix500 software for easy programming. Manufacturer Industrial Automation Brand Allen-Bradley Part Number/Catalog No. 1747-L553 Series SLC 500 Inputs 4096 Module Type SLC 5/05 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 Ethernet, RS-232 Backup Memory 1747-M13 Ambient Temperature 0 to 60 degrees Celsius Battery back-up memory Yes; 1747-BA UPC 10662072745622 UNSPSC 32151705