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1 November, 20:52

Assume the triac of an AC discrete output module fails in the shorted state. How would this affect the device connected to this output?

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  1. 1 November, 21:18
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    The device connected to the output would behave the same as if it had been connected directly to the ac power supply. It would run at full power and it would not be controllable.

    Explanation:

    If the triac of an ac output module fails in the shorted state, the device connected to the output would behave the same as if it had been connected directly to the ac power supply. It would run at full power and it would not be controllable.

    This implies that there is some sort of power storage device with the discrete output module which makes the system to run as if it is been connected to a source of power supply.
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