When you energize the ac load, the optoisolator provides pulses at the ac-line frequency to the input of the one-wire counter, a DS2423 IC.

• 可以存取标准单线协议所用时间的计数值。当给交流负载供电时，光耦以交流线频率，向单线计数器DS2423芯片的输入端提供脉冲。