Which of the following devices would not be classified as an

Which of the following devices would \"not\" be classified as an actuator? solenoid tachometer relay motor Which of the following would be classified as a manually operated switch? pressure switch temperature switch DIP switch level switch Briefly describe the function of a contactor switch. What is the symbol and function of a latching relay? Draw a ladder logic program which will perform the following operation: A conveyor belt starts running continuously with a green light indicator. The belt stops when a package arrives at labeling station with a red light indicator Having an emergency stop button in case of any fault or accident happens before the package reaches the labeling station. (show proper addresses and name for each devices used).

Solution

1. The output of actuator should be mechanical. Therefore the answer is tachometer.

2. SIP switch is manually operated switch.

3. The control of contactor is done electrically. It is used in power circuits. A contactor is controlled by a circuit which has a much lower power level than switching circuit. Range of breaking current is 24v to many kilo volts.

Contactors can be used in capacitor bank, lighting, motors etc.