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For an altivar ATV312HU22N4 ,we used channel AI3 for the reference input ,Is it possible to work for supply (-4 to -20 ma) ?

For the ATV312 Range; it is only adjustable starting from 0 to 20mA, but it cannot work in other ranges.

Although; to make it happen, You just need to configure a solution to invert the direction of current.

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