1747-L542 Product datasheet 

1747-L542 Functional Description 

The AB 1747-L542 SLC 5/04 32K Controller serves as a mid-range processor in the SLC 5/03 controller family, featuring 32 KB of user memory while maintaining the capability to manage up to 4096 I/O points. This processing unit is specifically designed for modular hardware systems, requiring installation in slot zero of compatible SLC chassis where it draws power directly from the backplane.

A significant advantage of the SLC 5/04 32K Controller ROCKWELL 1747-L542 lies in its integrated communication capabilities, featuring both RS-232 and Data Highway Plus ports that enable seamless connectivity with HMIs, SCADA systems, and other Allen-Bradley controllers. The processor's efficient scanning performance includes a typical program scan time of 0.9 ms/Kword, ensuring responsive operation in automation applications.

The front panel of the CPU PROCESSOR UNIT Allen-Bradley 1747-L542 provides comprehensive status monitoring through LED indicators for run status, CPU faults, forced I/O, battery condition, and communication port activity. For memory preservation, this controller utilizes a combination of Flash EPROM and battery-backed RAM, ensuring program integrity during power interruptions.

Engineered for industrial environments, the SLC 500 Series 1747-L542 Allen Bradley operates reliably across a temperature range of 32-140°F while withstanding vibration and shock conditions typical in manufacturing settings. This robust design, combined with its flexible expansion options supporting up to three local chassis, makes the 1747-L542 PLC Module AB a durable and scalable solution for medium-complexity control systems.