Allen-Bradley 1747-L541 SLC 500 CPU Processor Unit

The Allen-Bradley 1747-L541 SLC 500 CPU Processor Unit is the SLC 500 family’s 5/04 processor, designed for compact automation tasks. It provides 16,000 words of user memory and DH+ and RS-232 serial communications for standard PLC networking. The CPU delivers a program scan time of about 0.9 milliseconds and an I/O scan time around 0.225 milliseconds per keyword, enabling responsive control in small to mid‑size applications. This module is intended for installation in SLC 500 backplanes and is compatible with the 1747-series I/O modules, delivering familiar ladder logic-based control for discrete operations, timing, and basic arithmetic within legacy manufacturing lines. Its capacity supports moderate‑size control programs and data handling while preserving a rugged, modular design suited to ongoing maintenance and upgrades in established automation environments.