ABB Module IMDSO14 IMDS014 ABB IMDSO14 IMDS014 IMDSO14 Digital Output Module new version

Product Description:

In the operating mode "Pt100 in 3-wire configuration" two adjacent analog inputs belong together (e.g. EW 6,00 and EW 6,01). For configuration, both inputs must be configured to the desired operating mode, see configuration table Fig.The constant current of the one channel flows through the Pt100 resistance sensor, the constant current of the other channel through one of the wires.The basic unit 07 KT 94 calculates the measuring value from the two voltage drops and stores it under the odd address at the two involved inputs must not exceed this measuring range. Input voltages that exceed the measuring range cause the overflow numerical value of +32767. If the measured value is below the range, the underflow numerical value of -32767 is set.Measuring ranges with Pt100 as temperature sensor in 3-wire configuration The following figure shows the connection of Pt100 resistance thermometers in 3-wire configuration.

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Product's Character:

In order to avoid measurement errors, it is absolutely necessary, to lead the cores to the Pt100 sensors in the same cable. The cores must have the same cross section. Per channel, a twisted pair is used (for the two terminals of the Pt100 sensors) plus a single core (half of a twisted pair) for the connection to AGND1.Depending on the configured operating mode, the measured value is assigned linearly as follows:Several (or all) analog inputs can be configured as digital inputs. When doing so, they evaluate input voltages higher than ca. +7 V as signal 1. The input impedance in this operating mode is about 4 kW. Terminal M is the reference potential.The input signal delay is 7 ms. It cannot be configured.
The inputs are not electrically isolated.

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