Which type of PLC system manufactured by Allen Bradley allows multiple processors in the same chassis?

• A. CLX5000
• B. SLC500
• C. MicroLogix 1000
• D. PLC-5

Answer: (A)

Think about how modern PLC backplanes are designed to handle processing and I/O. Some families are built to host only one central processor per chassis, while others use a modular backplane that can accommodate more than one CPU in the same enclosure. The ControlLogix 5000 family from Allen-Bradley is designed for this kind of multi-processor configuration within a single chassis. That means you can install two or more processors in the same rack, allowing parallel processing or a hot-spare arrangement without needing additional cabinets. This capability makes CLX5000 stand out from the other AB families listed, which are typically intended for a single CPU per chassis. So, the CLX5000 system is the type that allows multiple processors in the same chassis.