In the following application, a temperature switch controls a heating contactor and a flow switch is used to ensure there is enough air flow. If there is not enough air flow, an alarm is sounded. Complete the required information. 1. List all the signal devices in the circuit. 2. List all the action devices in the circuit. 3. List the decision part of the circuit that automatically sounds the alarm if there is a problem. 4. When the heating element is on during normal operation, is the flow switch open or closed? CIRCULATING FAN TEMPERATURE SWITCH HEATING ELEMENTS FLOW SWITCH HOT AIR PADDLE AIR FILTER NORMALLY CLOSED FLOW SWITCH 65 ALARM (SOUNDS IF NO FLOW FOR 15 SECONDS OR MORE) HEATING CONTACTOR ON-DELAY TIMER SUPPLY AIR COLD AIR (3) TIME SET= 15 SEC 2014 American Technical Publishers, Inc. All rights reserved

In the following application, a temperature switch controls a heating contactor and a flow switch is used to ensure there is enough air flow. If there is not enough air flow, an alarm is sounded. Complete the required information. 1. List all the signal devices in the circuit. 2. List all the action devices in the circuit. 3. List the decision part of the circuit that automatically sounds the alarm if there is a problem. 4. When the heating element is on during normal operation, is the flow switch open or closed? CIRCULATING FAN TEMPERATURE SWITCH HEATING ELEMENTS FLOW SWITCH HOT AIR PADDLE AIR FILTER NORMALLY CLOSED FLOW SWITCH 65 ALARM (SOUNDS IF NO FLOW FOR 15 SECONDS OR MORE) HEATING CONTACTOR ON-DELAY TIMER SUPPLY AIR COLD AIR (3) TIME SET= 15 SEC 2014 American Technical Publishers, Inc. All rights reserved

Automotive Technology: A Systems Approach (MindTap Course List)

6th Edition

ISBN:9781133612315

Author:Jack Erjavec, Rob Thompson

Publisher:Jack Erjavec, Rob Thompson

Chapter25: Detailed Diagnosis And Sensors

Section: Chapter Questions

Problem 9RQ: Many control systems have operating modes that can be accessed with a scan tool to control the...

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Circuit Problem and Description: Using the given components, design a pneumatic circuit which will correctly and safely operate this machine control application. This is a simple two- cylinder sequence (A and B), as follow; A+ B+ A- B-. This is known as a simple sequence when the order for the cylinder to move out is the same as for cylinder to move back. The start-up signal will be by means of a normally closed 3/2 way valve operated by push button (M1) or normally closed 3/2 way valve operated by switch (M2). Full extension and retraction of each cylinder can be monitored by four normally closed 3/2 way valve operated by roller (M3-M6). Extension and retraction speeds of both cylinders must be adjustable using 2 sets of 2 single-direction flow regulation valves. Materials: Component Description Part # SAI 2026 Double acting cylinder SAI 2015 Normally closed 3/2 way valve operated by push button SAI 2016 Normally closed 3/2 way valve operated by switch SAI 2013 Normally closed 3/2 way…
13) Write a program to implement the process illustrated in the figure below. The sequence of operation is to be as follows: • Normally open start and normally closed stop pushbuttons are used to start and stop the process. • When the start button is pressed, solenoid A energizes to start filling the tank. • As the tank fills, the empty level sensor switch closes. • When the tank is full, the full level sensor switch closes. • Solenoid A is de-energized. • The agitate motor starts automatically and runs for 3 min to mix the liquid. 15 • When the agitate motor stops, solenoid B is energized to empty the tank. • When the tank is completely empty, the empty sensor switch opens to de-energize solenoid B • The start button is pressed to repeat the sequence. SOL A Motor Full sensor switch Empty sensor switch +SOL B Start/stop control station
Chapter 18 Controlling a Preumatic System 461 Timing volume reservoir Goodheart-Willcox Publisher Figure 18-31, Timing-volume reservoirs allow ontrol of the sequence of a circuit using pilot-activated directional control valves.
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Which type of control system is used in the given block diagram? Write the definition.
1. A mixing vat has an inlet valve, an outlet valve, a mixing motor, and a single level detecting switch (Figure 1). Both valves are opened by solenoids. The level switch closes when the vat is full and stays closed until the vat is empty. Draw a PLC ladder logic diagram and provide the allocation list to do the following: a. When the start button is pushed, the inlet valve opens until the vat is full. b. The mixer motor comes on for 5 min. c. The outlet valve opens until the vat is empty. (closed) Level switch Motor Inlet valve Outlet valve Float Vat Figure 1
An emergency stop system is to be designed for a certain automatic production machine. A single “start” button is used to turn on the power to the machine at the beginning of the day. In addition, there are two “stop” buttons located at two locations on the machine, either of which can be pressed to immediately turn off power to the machine. Let X1 = start button (normally open), X2 = stop button 1 (normally closed), X3 = stop button 2 (normally closed), and Y = power-to-machine. (a) Construct the truth table for this system. (b) Write the Boolean logic expression for the system. (c) Construct the ladder logic diagram for the system
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The final control element in a closed loop control system is known as correction element megsurement element O comparison element process
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Means that data concerning the effects of the computers commands are fed back to the computer as an input signal.
A pick and Place machine is being used to transfer a box. The arm is extended (out) by energizing a solenoid valve; when the valve is de-energizes, the arm retracts (in). In the same way, a second valve closes the grip (when energized) or opens the grip (when de-energized). Here's a diagram of this "machine": Grip Air Cylinder Grip open Grip Closed Box Arm Air Cylinder Arm In Arm Out The system is really slow... it actually takes 3-4 seconds for the arm to fully extend. An engineer created the below diagram. Start Pressed Time (seconds) Box Falls - 1 -2 -3 - 4 - 5 -6 –7 -8 – 9 – 10 Extend Arm Close Grip Question (finally!). Which statement is completely true regarding this design? It uses the Master Clock scheme. Given this diagram, the arm will probably start to retract before the grip fully closes. O If the arm takes 4 seconds to retract (return), the box will be dropped "mid-flight" It uses the Domino Scheme. Things can't happen in the wrong sequence. It uses the Master Clock…