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These barriers accept inputs
from a wide variety of potentiometers and provide a 4-20mA output signal (Ex-I
version) or a 0 - 10V output signal (Ex-U version) for use
as a control signal or simply to display the control setpoint on a control
room panel display or locally on a
field-mounted digital display.
The resistance value of the potentiometer's wiper contact, ranging from 0 Ohms
to the nominal resistance value (final value) of the potentiometer, is detected
and processed linearly.
A potentiometer is defined by its nominal value. Any potentiometer with a
nominal resistance value between 800 Ohms and 20,000 Ohms may be used. The
permissible line resistance may not exceed 50 Ohms at a potentiometer resistance
of 800 Ohms.
Input from 3-wire or 5-wire
Resistance range 800 to 20,000 Ohms
Output 0/4 to 20 mA
(Ex-I version) or 0 to 10V (Ex-U version)
Linearity < 0.1%
Temperature Drift <0.02% /K of final
IM Series Type
If you require potentiometer control of a 4 - 20mA I.S.
circuit, this I.S. Set Point Station may be just
what you need, just click on image for more details....