VT420 can convert signal from any 4-20mA current loop sensor. Depending on the source of current for the loop, devices may be classified as active (supplying or "sourcing" power) or passive (relying on or "sinking" loop power).
If the sensor is passive, it requires external current source. To help You choose the power supply voltage and amperage please read: "VT420 Technical Documentation".
Converter of direct current 4-20mA is used for measurement of constant current on 4-20mA from different sensors and converting data into format of IP monitoring system. Sensor is connected to Vutlan monitoring system by RJ11 / RJ12 cable and detected by the system automatically.
The system interface allows you to assign the sensor and to introduce the function data conversion.
Below are some of the screenshots showing four easy steps in order to tune "VT420 / converter" for usage with 4-20mA sensor.