Belimo Resistor to Convert 4-20mA to Control Signal ZG-R01 HVAC Controls

The ZG-R01 is a 499 ? Resistor which has been encased in a section of heat shrink tubing with short sections of hook up wire.The ZG-R01 is used to convert a 4 to 20mA signal into a 2 to 10 VDC control signal.