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An onoff start up signal governs the compressor motor of a large commercial air conditioning unit In general the start up signal should be on whenever the output of a temperature sensor S exceeds

 An on/off start-up signal governs the compressor motor of a large commercial air conditioning unit. In general, the start-up signal should be on whenever the output of a temperature sensor exceeds a reference temperature. However, you are asked to limit the compressor start-ups to certain hours of the day and also enable service technicians to start up or shut down the compressor through a manual override. A

time-of-day indicator is available with on/off outputs, as is a manual override switch . A separate timer prohibits a compressor start-up within 10 min of a previous shutdown. Design a logic diagram that incorporates the state of all four devices (SD, and ) and produces the correct on/off condition for the motor start-up.

Jun 18 2020 View more View Less

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