product description：
The instrument is supplied by AC220V/50Hz (±10%) power, with measuring range of 0 ~ 500V and accuracy of 0.5 grade. With manual/automatic switching range function, it can be divided into three levels: 500V, 100V, 10V. The rs-485 communication interface supports the standard modbus-rtu communication protocol, the output function of over-quantity relay or the alarm function of over-range buzzer, and the installation mode is industrial-grade cabinet.
