CPU Unit ABB Module System CI857K01 3BSE018144R1 ABB CI857K01 3BSE018144 R1

ABB Module CI857K01 3BSE018144R1 ABB CI857K01 3BSE018144 R1 CPU FACTORY SEALED

Product Description:

From the value of the channel with the higher address. The converted measured value is available on the odd address (e.g. EW 6,01). Important: The common mode input voltage range equals the measuring
range of the single channel. I.e. that the signals, related to AGND, 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. In all configurations using differential inputs two adjacent analog inputs belong together (e.g. EW 6,00 and EW 6,01). For configuration, both inputs must be configured for the desired operating mode, see configuration table Fig. The measured value is calculated by subtraction. The value of the channel with the lower address is subtracted

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Product's Character:

When resistance thermometers are used, a constant current must flow through the measuring resistor in order to create the necessary voltage drop for the evaluation. For this purpose, the basic unit 07 KT 94 provides a constant current sink, which is multiplexed to the 8 analog channels. The following figure shows the connection of Pt100 resistance thermometers in 2-wire configuration.Measuring ranges and with Pt100 as temperature sensor in 3-wire configuration The following figure shows the connection of Pt100 resistance thermometers in 3-wire configuration.The 07 KT 94 unit linearizes the Pt100 characteristic.Temperatures 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. In case of a detected open-circuit the numerical value of +32767 is set. If the sensor is short-circuited, the numerical value of -32767 is set.

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