BJ194E-2S4(S), simplify type of the E series power meter, Removed the alarm and pulse interface Measure: Three-phase voltage (phase voltage, line voltage), frequency, current, active power, reactive power, apparent power, power factor, active power, reactive power. These parameters can be centralized on a PC or PLC through an RS 235 link using MODBUS protocol. Also can choose ASCII code direct output, easy for secondary development.