The 2-channel potentiometer amplifier

IM36-22EX-I is designed to transmit signals

from 3/5-wire potentiometers galvanically isolated from the Ex area to the non-Ex area and

to convert them into normalized 0/4…20 mA

analog signals. Live-zero operation is activated for both channels through bridging terminals 14 and 15. The resistance value of the

wiper contact, ranging from 0 ò to the nominal resistance value (final value) of the potentiometer, is detected and linearly processed.

A potentiometer is defined by its nominal resistance value. Any potentiometer can be connected, provided the nominal resistance is

800 … 100000 ò. Common potentiometers

featuring a nominal resistance of 1 kò or 10

kò can thus be used. The admissible line resistance is maximally 50 ò with a potentiometer resistance of 800 ò.

The incremental potentiometer's start and

end point can be adjusted separately for each

channel. This is necessary to protect the incremental potentiometer from damage which

can be caused by critical rotation angles

smaller than 5% and greater than 95% of the

absolute rotational torque.

■ Transmission of potentiometer signals from

the Ex area

■ Potentiometer, nominal resistance: 0.8…

100 kò

■ Output circuit: 0/4…20 mA

■ Complete galvanic isolation

■ Input reverse-polarity protected

■ ATEX, IECEx, TR CU, KOSHA

■ Installation in zone 2