Allen‑Bradley 1747-L40C SLC 500 fixed hardware‑style processor combines a 1K‑instruction CPU with integrated I/O: 24 24 VDC digital inputs (sinking) and 16 relay contact outputs, all powered from a 120/240 VAC supply. It provides 1K instruction capacity and 1,024 words of memory for program storage, plus a DH‑485 serial port for communications with other PLCs and devices. The module also provides 24 VDC user power for sensors up to 200 mA, enabling local peripherals to be powered from the controller. Designed for compact, standalone automation tasks, the 1747-L40C packages processor, I/O, and power in a single, rugged unit for small to mid‑size control applications.
