Allen-Bradley 1747-L40C SLC 500 Programmable Logic Controller

The Allen-Bradley 1747-L40C is a fixed-hardware SLC 500 CPU designed for compact, reliable PLC control in traditional factory automation setups. It provides 1K words of user memory, 24 digital inputs (24V DC, sink) and 16 relay-contact digital outputs, all powered from a 120/240V AC supply. The processor includes a built-in DH-485 port for serial networking and is part of the SLC 500 fixed-hardware family (Series C), making it suitable for straightforward sequencing, motor control, and discrete I/O tasks in small-to-midscale applications. With these specifications, the 1747-L40C excels in environments where robust, engineer-friendly control is required and legacy Rockwell Automation hardware remains in service.