A drum timer is a good example of: A. an output actuator B. an input sensor C. a position sensor D. a sequence controller E. None of the above

The correct answer is: D. a sequence controller

A drum timer is a type of sequential controller that uses a rotating drum to control the sequence of events in a process. The drum is divided into a series of slots, each of which contains a set of instructions. The instructions are executed one at a time as the drum rotates.

A drum timer is a good example of a sequence controller because it controls the sequence of events in

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