88VA02A-E ABB

The internal power supply is the working power supply of the PLC,that is,the working power supply of the PLC internal circuit.Its performance directly affects the reliability of PLC.Therefore,in order to ensure the normal operation of the PLC,there are higher requirements for the internal power supply.Generally,the internal power supply of PLC adopts switching regulated power supply or regulated power supply of primary sideband low-pass filter.

内部电源是PLC的工作电源，即PLC内部电路的工作电源。它的性能好坏直接影响到PLC的可靠性。因此，为了保证PLC的正常工作，对内部电源有较高的要求。一般PLC的内部电源都采用开关式稳压电源或原边带低通滤波器的稳压电源。