The PLC power supply is an important part of the automation system. It provides the necessary voltage to operate other components of the PLC such as CPU, input/output modules, and other expansion modules.

This power supply typically provides 24VDC DC voltage, although there are some types of PLCs that use different voltages. This voltage is converted from the main power supply (e.g. AC mains) via converters or transformers.

Some important features of PLC power supplies include:

1-Voltage stability: Make sure that the PLC receives a stable and unfluctuating voltage, to avoid problems or errors during operation.

2-Protection: Protection against problems such as overcurrent, short circuit, and temperature variations, to ensure the safety of system components.

3-High efficiency: The power supply must have high efficiency to ensure that it does not waste energy and does not heat up the system.

When choosing a power supply for a PLC, it is important to choose a quality power supply from a reliable manufacturer to ensure stable and safe operation of the automation system.