that should have a resistor already in it and you simply supply 'excitation' voltage. The resistance will limit the current on its own, as long as you don't give it a voltage too far out of its specified range. Should be listed on the side of the unit as 24 volt or 28 volt or 5 volt or 10 volt etc etc etc.
it is a linear variable displacement trasducer, it has internal resistors and a coil.
on one of the test "in the manual" it asks for a given voltage at a given max current allow.