Allen-Bradley 1754-L28BBB PLC Module

The Allen-Bradley 1754-L28BBB is a GuardPLC 1200 safety controller module designed for integration with Rockwell Automation’s GuardPLC 1200 Controller Systems, delivering safety‑rated control within a compact backplane. Powered by 24V DC with an 8 A supply (NSNP), this module is built for industrial environments demanding reliable safety interlock and emergency‑stop operations, and it supports Ethernet communication via four RJ-45, 10/100BaseT ports with an integrated switch as part of the GuardPLC Ethernet interfaces. The 1754-L28BBB is listed as part of the Series B GuardPLC 1200 family, with firmware listed as version 2.04 (rev B01) on retailer specifications, underscoring compatibility with GuardPLC hardware and software ecosystems. Typical applications include safety interlocks, guarded machinery, and other safety‑rated control tasks where a dedicated GuardPLC controller provides deterministic safety logic and networked safety communications.