In this design, im1281 mutual induc

In this design, im1281 mutual inductance metering module is selected as the power acquisition module. The wiring of this module is divided into two parts: voltage and current test input terminal wiring and serial port communication wiring. According to the actual needs, different TTL transfer boards are used to realize the communication with different terminals. Be able to measure and display the current power frequency grid voltage. It can measure and display the current load (consumer) current; it needs to be added that the starting point of current is 10mA, but this module belongs to high-power testing equipment, such as the suggestion that the Ma level current testing accuracy is more concerned. It can measure and display the current cumulative electricity consumption; it needs to be added that the minimum unit of electricity metering in this module is 0.001kwh, i.e. 1wh starts to accumulate, and the resolution is relatively high. For the load test of small power (within 100W), it is more intuitive to observe the process of electricity accumulation.