Allen-Bradley 1747-L553 SLC 500 CPU Module Controller

Allen-Bradley 1747-L553 is the SLC 5/05 CPU module for the SLC 500 family, designed to run ladder logic on mid-range automation systems. It provides built-in Ethernet 10Base-T and a channel for RS-232 (DH-485, DF1, or ASCII) communication, enabling Ethernet-based messaging and RS-232-based programming or data exchange with HMIs and other controllers. The processor features 64K words of user memory, a program scan time of about 0.9 ms and an I/O scan time of about 0.225 ms, and supports up to 3 local I/O chassis with as many as 30 I/O modules in the local chassis. Firmware runs Series C OS501 or higher, with Flash-backed backup memory and operation in 0–60°C ambient temperature, making it suitable for machine control, packaging lines, and general automation tasks.