Answer: the im1281b electric energy metering module supports MODBUS and DL / T 645-2007 protocols at the same time. Therefore, 

it can directly replace the electric energy meter for electricity accumulation and electric parameter collection. The user only needs to 

solve the connection problem of power supply and communication, and does not need to make any changes in the software. Its typical 

applications include replacing electric energy meters in automobile charging piles.