L
laylow
- Jan 1, 1970
- 0
I'm trying to get an idea of how 4-20ma transducers work. A simple
schematic would be very helpful.
Many measurement transducers that I've seen accept a wide range of
power supply voltage yet return a controlled current signal. They
must do more than just vary resistance or else the current provided
would vary with supply voltage. There must be some method of
monitoring the supply voltage and returning a proportional load to the
circuit.
Does anyone have a circuit for a simple current loop signal transducer
that I can look at? (I'm not talking about the induction coil type
that actually induces a coil through a hot wire).
Thanks.
schematic would be very helpful.
Many measurement transducers that I've seen accept a wide range of
power supply voltage yet return a controlled current signal. They
must do more than just vary resistance or else the current provided
would vary with supply voltage. There must be some method of
monitoring the supply voltage and returning a proportional load to the
circuit.
Does anyone have a circuit for a simple current loop signal transducer
that I can look at? (I'm not talking about the induction coil type
that actually induces a coil through a hot wire).
Thanks.