Which PLC component provides the mechanical support for the modules?

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Multiple Choice

Which PLC component provides the mechanical support for the modules?

Explanation:
In PLC systems, the components that hold and align the plug-in cards are mounted in a frame called the rack. It provides the mechanical support for the modules, giving them a stable place to slide in, stay aligned, and be securely mounted. The backplane, by contrast, is the electrical backbone that connects those modules to power and I/O signals; it doesn’t bear the weight or position of the modules. The enclosure is the outer protective shell around the entire assembly, not the structure that directly supports the modules. While the term chassis is sometimes used for the frame, the standard term for the part that provides mechanical support for the modules is the rack.

In PLC systems, the components that hold and align the plug-in cards are mounted in a frame called the rack. It provides the mechanical support for the modules, giving them a stable place to slide in, stay aligned, and be securely mounted. The backplane, by contrast, is the electrical backbone that connects those modules to power and I/O signals; it doesn’t bear the weight or position of the modules. The enclosure is the outer protective shell around the entire assembly, not the structure that directly supports the modules. While the term chassis is sometimes used for the frame, the standard term for the part that provides mechanical support for the modules is the rack.

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