FAQ - Position Feedback Boards

4-20mA or 0-10VDC Feedback Kit, V Series with "N" in model number

4-20mA Feedback Board, V Series with "E" in model number

What does the 4-20mA Feedback option do?

Like the potentiometer, this option is used to provide feedback about the valve position.  The feedback function internally generates a 4-20mA or a 0-10VDC signal in accordance with the position of the output of the actuator.

Are there any mating instrumentation limitations?

The standard V Series feedback electronics are a true current source that can drive impedances of up to 600 ohms.  They do not require a resistor in series to measure the boards mA between 100 and 500 ohm.  A multimeter has virtually no impedance; therefore, the output may be checked without a resistor in series in order to receive the correct output.  Careful, this happens often!

When do use retransmit boards vs potentiometers?

The feedback board is used when a mA or voltage feedback is required.  If a resistance feedback (0-1000 ohms) is acceptable, the feedback board is not required.  For example, in some cases the controller has the capability to generate a voltage across the potentiometer and, in turn, read the voltage feedback resulting from the potentiometer wiper position.