ABB Module DSPC172H ABB DSPC172-H ABB DSPC172 H ONE USED ABB DSPC172H effective service

ABB Module DSPC172H ABB DSPC172-H ABB DSPC172 H ONE USED ABB DSPC172H effective service

Product Description:

The input impedance is ca. 330 Ω. The current input has a self-protecting mechanism. If the input current gets too high, the shunt is switched off and the value for range overflow is generated. About every second, the unit tries to switch on the shunt again. In this way the correct measurement
will succeed after the current has reached a normal value again. The trigger of the self-protecting mechanism is displayed by the red LED Ovl as long as the overload is present. Inthe PLC system an error message is then stored (FK4, error number 4). The following figure shows the connection of a 3-wire sensor powered by 24 V DC and of a 2-pole sensor powered electrically isolated. Both sensors work as active current sources 0...20 mA.

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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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The use of the product: