Most DAQ are supplied by 220V AC power,and others that require high real time are supplied by power system which is made up of main powerAC power and mothball powerstorage battery. The twopower supply system avoids the data lost while AC power is off.

• 目前大多数据采集系统采用220V交流电源供电,而在实时性要求高的场合则采用交流电源作为主电源并且蓄电池作为备用电源的双电源系统进行供电,以防止由于交流电源的突然断开而造成数据采集系统的数据丢失。