As the core component of the communication system, the power supply system is of vital importance. Uninterruptible Power Supply (UPS) systems are crucial for maintaining uptime, preventing data loss, and protecting equipment from sudden. A. 5 Survey Diagram, Block Diagram and Functioning Principle of the d. What is a Power Supply? A power supply is an. PLC (Programmable Logic Controller) is a digital control system that replaces complex hardwired relay logic with a flexible, programmable solution. It stores instructions to control industrial machines, systems, and processes based on input and output conditions. Such an architecture is not only.