Improvement module for the power supplies

In control supply catalog, There is a "cutoff Module" as a change module for the power supply to ensure a secured control supply even still loads for example when the motor starts and the specific enacting of circuit breakers as the once-over says. Notwithstanding, I can't understand what totally constraint modules are? it is secured to express that they are a response for spreading over right now control supply disappointments? In what point of confinement may they be used as a touch of initiating specific electrical switch?

This is the association with the limit module, C150S03 - 3.3V (3.2 ~ 3.3 V - 86W) as the datasheet of https://www.icrfq.com/part/3103542-C150S03.html for control supply list.

Would anyone be able to help me? I am extremely puzzled about this inquiry.
I am to a fantastic degree overpowered about this request.

Thankful and Best Regards
Jack