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Profibus Barrier
Optical Barrier
Fieldbus Multibarrier
Digital In
Digital Out
Analogue In
Analogue Out
Rotation In
Temperature In
Potentiometer In
Flow In





Potentiometer Input Barriers

Variable Resistance Input

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 potentiometers

  •  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 value                                            

  • Galvanically Isolated

IM Series Type Data Sheet Atex Cert Instructions


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....

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