ABB Module SAFT-188-IOC SAFT 188 5761744-6D ABB SAFT188IOC STROMBERG BOARD new version

ABB Module SAFT-188-IOC SAFT 188 5761744-6D ABB SAFT188IOC STROMBERG BOARD new version

Product Description:

Differential inputs are very useful, if analog sensors are used which are remotely non-isolated (e.g. the minus terminal is remotely earthed). Since the earthing potential is not exactly the same as
AGND1, it has to be measured bipolar in order to compensate measuring errors. Additionally, in case of singlepole configuration, AGND1 would be connected directly to the remote earth potential. This would cause inadmissable (and possibly dangerous) earthing loops. 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:

It has to be taken into consideration, that in this application the M terminal of the basic unit 07 KT 94 is
the reference potential. AGND1 is not dimensioned for carrying the sum of the sensor currents. The value of the range underflow is stored. If the ope circuit monitoring is configured, the open-circuit event is displayed by the red LED Ovl as long as it is present. In the PLC system an error message is stored (FK4, error number 9). The following figure shows the connection of 2-pole passive- type analog sensors 4...20 mA. If the analog current sensors 4...20 mA are powered from a separate power supply unit, the reference potentials 0V (of the separate power supply unit and the power supply unit for the 07 KT 94) must be interconnected to each other.In the above example, the AGND terminal remains
unused.

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