Understanding HOA (Hand-Off-Auto) switch
As we’ll see, perhaps the confusion is in the use of the term “HOA” itself. One of the best ways to determine how to designate a control switch operation is to use the terms “Location of Control” and “Mode of Control.” Location of Control is a phrase that refers to the place from which the motor or other field device is being operated. Locations could include “Hand” (it is operated directly at t..
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2019. 12. 23. 15:23
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