Question

Pump Low level switch L1 Heater High level switch L2 Outlet valve Temperature switch TS1 1. Make a list of all the discrete input devices and discrete output devices shown on the tank. Indicate if it is an input or an output. 2. Determine a suitable control voltage for the application. 3. Sketch a simple relay logic diagram that will turn on the heater when the temperature switch falls below its setpoint. Use the proper electrical symbols from the ISA 5.1 standard. 4. As a separate rung, sketch a simple relay logic diagram that will open the outlet solenoid valve when the high level switch is triggered. Close the outlet solenoid valve when the low level switch is triggered. Hand sketch the relay logic diagram on paper. Submit the I/O list and sketch on paper, or as a scanned document using Canvas.

          Pump
Low level switch L1
Heater
High level switch L2
Outlet valve
Temperature switch TS1
1. Make a list of all the discrete input devices and discrete output devices shown on the tank. Indicate if it is an input or an output.
2. Determine a suitable control voltage for the application.
3. Sketch a simple relay logic diagram that will turn on the heater when the temperature switch falls below its setpoint. Use the proper
electrical symbols from the ISA 5.1 standard.
4. As a separate rung, sketch a simple relay logic diagram that will open the outlet solenoid valve when the high level switch is
triggered. Close the outlet solenoid valve when the low level switch is triggered.
Hand sketch the relay logic diagram on paper. Submit the I/O list and sketch on paper, or as a scanned document using Canvas.

Show more…

Pump
Low level switch L1
Heater
High level switch L2
Outlet valve
Temperature switch TS1
1. Make a list of all the discrete input devices and discrete output devices shown on the tank. Indicate if it is an input or an output.
2. Determine a suitable control voltage for the application.
3. Sketch a simple relay logic diagram that will turn on the heater when the temperature switch falls below its setpoint. Use the proper
electrical symbols from the ISA 5.1 standard.
4. As a separate rung, sketch a simple relay logic diagram that will open the outlet solenoid valve when the high level switch is
triggered. Close the outlet solenoid valve when the low level switch is triggered.
Hand sketch the relay logic diagram on paper. Submit the I/O list and sketch on paper, or as a scanned document using Canvas.

Added by Jeffrey G.

University Physics with Modern Physics

Hugh D. Young 14th Edition

Instant Answer

Solved by Expert Adi S

06/14/2023

Step 1

Indicate if it is an input or an output. Discrete input devices: - High level switch L2 (input) - Low level switch L1 (input) - Temperature switch TS1 (input) Discrete output devices: - Heater (output) - Outlet valve (output) Show more…

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dwnd High level switch L2 Low level switch L1 ( Heater Outlet valve Temperature switch TS1 1. Make a list of all the discrete input devices and discrete output devices shown on the tank. Indicate if it is an input or an output. 2.Determine a suitable control voltage for the application 3.Sketch a simple relay logic diagram that will turn on the heater when the temperature switch falls below its setpoint. Use the proper electrical symbols from the ISA 5.1 standard. 4.As a separate rung,sketch a simple relay logic diagram that will open the outlet solenoid valve when the high level switch is triggered. Close the outlet solenoid valve when the low level switch is triggered Hand sketch the relay logic diagram on paper. Submit the I/O list and sketch on paper, or as a scanned document using Canvas.

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Transcript

00:01 So let us start with the concept which we are going to use here for this question.

00:06 So we have to use the concept of designing a temperature control system, temperature control system which utilizes a relay again to turn the heater on or off.

00:25 So the voltage close to the relay we have to apply about plus of 12 volt so that the heater will turn on and off to zero of the volt for turn off.

00:38 Now roughly the temperature should be of 20 to 22 degree of celsius.

00:44 Okay this we have to keep, we are able to turn on and off the led.

00:49 So basically what will be the required circuitry for this.

00:53 So let me draw that circuitry so here we will see the enable heating source and here we will say the power supply of 5 volt with variable resistance will be there.

01:06 This should be applied to this then let's take a resistance of r1 grounded to here and this we will going to apply with this ground terminal of the ic.

01:18 Now here we will say the reference point v0 and this is nothing but the variable resistance and basically this is what we are using the thermistor.

01:28 Why thermistor? because we are designing the temperature control systems for that we are going to need the thermistor here.

01:35 So let us design first this v0.

01:38 So this v0 should be equals to according to voltage divided by 5 into the internal resistance ri or r1 basically divided by r1 plus the r thermometer.

01:52 So when the temperature is high r thermometer will be low so v0 is going to be low and when it is low so it will be high means both are having the inverse response...

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