ABB DI818 Digital Input Module product description

ABB DI818 Digital Input Module product description

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On the replacement devices, the wire-break detection is also active in case of a differential voltage measurement. For this purpose, each measuring channel is internally pulled to "plus" by means of a high-impedance resistor. As a result, the individual potentials of the differential voltage measurement must also be referenced to M. Completely isolated voltages are not symmetrized to M by the inputs.

The existing device had a DIP switch on the upper printed circuit board. Since the replacement device is not equipped with an upper printed circuit board, the white DIP switch is arranged on the lower printed circuit board instead.

ABB DI818 Technical drawing:

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