POWER SUPPLY DEVICE OF A COMMUNICATION UNIT OF AN AIR CONDITIONING SYSTEM FOR CONVERTING EXTERNAL POWER UNITS AT THE SAME TIME ACCORDING TO THE STANDARD OF PLURAL ELECTRICAL DEVICES BY USING A CONVERTING UNIT IN COMMON

摘要

Purpose: the A power supply device of a communication unit for an air handling system is arranged to reduction number of parts and is used in conjunction with a power converting unit and in a signal receiving and transmitting system, electrical Interference is prevented between one voltage level sense unit, and the power supply unit by being isolated among per unit. Construction: the A power supply device of a communication unit for an air handling system includes (50) one signal of a signal receiving and transmitting system for sending and receiving to/from outside; One power supply unit (60) is used for the feeding operation power of signal receiving and transmitting system; One voltage level sense unit (70), is used to detect a voltage level of management ability; One power converting unit (80) is used to correspondingly change simultaneously management ability to the standard of signal receiving and transmitting system and voltage level sense unit.