PM-485 Pulse Modbus converter

Overview        Pm-485 micro power pulse modbus converter supports access to single pulse and three pulse water flushing meters. The micro power consumption of its own lithium battery continuously records the cumulative pulse value, and the working time can be up to five years, Provide RS-485 interface and support Modbus RTU protocol to read water volume data. Even in remote locations, it is also convenient to realize the timing collection of water consumption data。   Description：         · The left side as the upper picture are RS-485 interfaces, green: A, blue: B       · Red and yellow on the left side are external power supply cables, red is: "+" and yellow is: "-" (only for 485 interface power supply, which is used for upper device to read data)       · Red, green, black and yellow on the right correspond to K1, K2, K3 and public GND respectively (single and three pulse flushing meters are supported)       · The cumulative traffic can be read in floating-point numbers or integers       · The water meter magnification value and initial value can be configured          工作示意图：              Combined with comway RTU, it can collect and upload water meter data regularly in micro power consumption mode, so as to rejuvenate the pulse water meter in the era of Internet of things