用于远程抄表系统中的一个现场数据采集模块，精确到小数点后2位，可采集2路单脉冲2路双脉冲，并向上位机提供数据-For remote meter reading system in a field data acquisition module, accurate to two decimal places can capture 2-way single-pulse 2-way dual-pulse, to the host computer to provide data