ABB REO 517 Applications Manual page 435

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mA input module (MIM)
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The mA input module (MIM) has six independent analog channels with separated pro-
tection, filtering, reference, A/D-conversion and optical isolation for each input making
them galvanically isolated from each other and from the rest of the module.
The analog inputs measure DC and low frequency currents in range of up to +/- 20mA.
The A/D converter has a digital filter with selectable filter frequency. All inputs are cal-
ibrated separately and the calibration factors are stored in a non-volatile memory and
the module will self-calibrate if the temperature should start to drift. This module com-
municates, like the other I/O- modules, with the Main Processing Module via the CAN-
bus.
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