8. What instruction would you select for each of thefollowing discrete input field devices to accomplishthe desired task? (State the reason for your answer.)a. Turn on a light when a conveyor motor is runningin reverse. The input field device is a set of con-tacts on the conveyor start relay that close whenthe motor is running forward and open when it isrunning in reverse.b. When a pushbutton is pressed, it operates a so-lenoid. The input field device is a normally openpushbutton.c. Stop a motor from running when a pushbuttonis pressed. The input field device is a normallyclosed pushbutton.d. When a limit switch is closed, it triggers an instruc-tion ON. The input field device is a limit switchthat stores a 1 in a data table bit when closed.

Devices that receive discrete digital signals—also known as digital input devices—can only transmit…

8. What instruction would you select for each of the following discrete input field devices to accomplish the desired task? (State the reason for your answer.) a. Turn on a light when a conveyor motor is running in reverse. The input field device is a set of con- tacts on the conveyor start relay that close when the motor is running forward and open when it is running in reverse.

8. What instruction would you select for each of the following discrete input field devices to accomplish the desired task? (State the reason for your answer.) a. Turn on a light when a conveyor motor is running in reverse. The input field device is a set of con- tacts on the conveyor start relay that close when the motor is running forward and open when it is running in reverse.

Electricity for Refrigeration, Heating, and Air Conditioning (MindTap Course List)

10th Edition

ISBN:9781337399128

Author:Russell E. Smith

Publisher:Russell E. Smith

Chapter13: Heating Control Devices

Section: Chapter Questions

Problem 31RQ

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Similar questions

H.W: What instruction would you select for each of the following discrete input field devices to accomplish the desired task? (State the reason for your answer.) a. Turn on a light when a conveyor motor is running in reverse. The input field device is a set of contacts on the conveyor start relay that close when the motor is running forward and open when it is running in reverse. b. When a pushbutton is pressed, it operates a solenoid. The input field device is a normally open pushbutton. c. Stop a motor from running when a pushbutton is pressed. The input field device is a normally closed pushbutton. 33
Industrial Motor Controls 8.a. A typical motor speed control circuit that is controlled by an analog current loop will have a current ofA. 4-20 mA.B. 2-20 mA.C. 5-50 mA.D. 0-10 mA.8.b. Which one of the following statements is true of a disabled contact or coil?A. The disabled element has been automatically disabled due to module failure.B. The disabled element is held false by the PLC.C. A disabled contact or coil is caused by a faulty memory location in the PLC.D. A contact must be in the disabled state before it can be forced ON or OFF.
14.a. An encoder is a device that is used toA. excite the motor's interpoles.B. feed pack position information.C. reduce brush sparking.D. commutate the field windings.14.b. The letters CEMF are used to describeA. centrifugal forces within a motor.B. the portion of the supplied current that is converted to heat.C. countervoltages and currents created within a motor.D. critical winding currents that should not be exceeded.
1. It is a machine that converts mechanical energy to electrical energy. 2. It is a machine that converts electrical energy to mechanical energy. 3. It is cylindrical or drum-shaped where the coils are placed and can either be lap wounded or wave wounded. 4. It connects the commutator to the other parts of the DC machine. 5. It serves as the housing of the dc machine. 6. True or False: The shunt field winding is part of the armature. 7. True or False: The long shunt compound generator is when the armature is in series with the series field winding and parallel to the shunt field winding. 8-10. Your newly built house needs an elevator. Which from the following will be best to use- series, shunt or compound motor and why?
Required information A fan is to run only when all of the following conditions are met: • Input A is OFF. • Input B is ON or input C is ON, or both B and Care ON. • Inputs D and E are both ON. . One or more of inputs F, G, or H are ON. Saved Note: This is a multi-part question. Once an answer is submitted, you will be unable to return to this part. Identify the correct typical PLC ladder logic diagram for the given control system. Multiple Choice
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The preferred method for applying the field excitation voltage uses a field relay which operates on the principle of A. speed application. B. time application.C. angle application. D. thermal application.
A step up chopper has an input of 200 volts and output of 250 volts. The blocking period is each cycle is 0.6x10-3 seconds. Find the period of conduction in each cycle and frequency of operation?
Please help with the following questions, thank you. Calculate the following : 1) At what voltage is the switching point? 2) The hysteresis spread ?
I have a wooden toy train that runs on wooden tracks. I would like to place two ESP-WROOM-32 Boards on top of the train. Broadcast communication (which involves radio frequency, not Wi-Fi) would help communicate about the train's lateness to five other wooden trains on the same track. Local communication would help communicate to the train station about the train's lateness. I would also need radio frequency Tx-Rx Modules for discharging and undergoing the signal, and repeaters just in case the signal loses power due to long-distance traveling. My wooden train should be automated. It should run at 4 inches per second, keep a minimum distance of 30 seconds away from the other wooden trains, and make a 17-second-long stop every 500 seconds. What's the procedure to connect the components? What's the Arduino code (C++) for this project?
Technician A says when testing the voltage output, if the charging voltage is too high, the cause could be an open field wire from the regulator. Technician B says a loose or glazed drive belt could be the cause of too high charging voltage. Who is correct? A only B only Both A and B Neither A or B Technician A says that poor connection at the generator output wire can cause charging systems problems. Technician B says that many charging system circuits contain a circuit protection device. Who is correct? A only B only Both A and B Neither A or B
9.a. A servo system is oscillating at standstill. This is an indication thatA. the following error limit has been exceeded.B. a motor winding is open.C. the system gain is too high. 9.b. In a DC servo motor system, the tachometer feeds back a voltage that’s proportional to motor speed.Where does this voltage go to?A. The interpolator cardB. The driverC. The CPU in the main controller