QuestionQuestion

Transcribed TextTranscribed Text

Lab 2.llntroduction to Ladder Logic Wire the following circuit and describe what happens when the switch closes: 12 VDC (24 VDC) X1 ..----------{"r------lll--l---------, � SW1 Switch (may also use a piece of wire) 1 CR1 Control Relay (usually not ground) Fig. 2-42 Switch Energizing Relay Coil The following is used only for the 12 VDC Relay: Describe the contact position of the normally open and normally closed contacts of the control relay coil when the switch position is open, closed. Draw status of contacts between 2-3 and 3-4 Notice that the same contacts are found on the opposite side between 5-6 and 6-7 Relay Coil Use the DMM to measure the status of the contacts. When measuring ohms, very high is an open and very low is a closed contact. Fig. 2-43 Relay with Contacts to be Added 2.1-1 Wire the following circuit and observe what happens when the button is pushed: X1 12 VDC (24 VDC) X2 .---------<>------111--J---------, PB1 Pushbutton __L CR 1 C 1 CR 1 LT1 " / LT2 " / Fig. 2-44 Push Button Controlling Two Lights Control Re lay Indicator Lite Indicator Lite 2.1-2 Describe observations of Fig. 2-45 before the pushbutton is pushed and when the pushbutton is pushed. Wire the following circuit and observe what happens when the buttons are pushed: X1 12 VDC (24 VDC) � X2 ------<,--------1111------<J-----� __L PB1 __L PB2 CR1 CR2 LT1 -- CR1 CR2 '- / -I -1---- Fig. 2-45 Two Pushbuttons / " 2.1-3 Construct a table similar to Table 2-2 showing when either push button is pushed or not pushed, the state of the light. To what type of circuit from digital logic would the output of Table 2-2 be equivalent? LTl PB 1 Off PBl On PB2 Off PB2 On Table 2-2 State of Light LTl 2.1-4 Change the circuit so that CR2 uses a normally closed contact in the circuit for the light as follows and fill in the table similar to Table 2-2 again. CR1 CR2 � � LTl PB2 Off PB2 On PB 1 Off PBl On Change the circuit to the one as follows: X1 12 VDC (24 VDC) �----<>-----<II-------� X2 ___L_ PB1 ___L_ PB2 CR1 CR2 CR1 CR2 LT1 ' / Fig. 2-46 Two Pushbuttons 2.1-5 Fill in a table similar to Table 2-2 showing the state of the light when either push button is pushed or not pushed. To what type of circuit from digital logic would the output of Table 2-2 be equivalent? Wire the following circuit and observe what happens when the buttons are pushed: X2 X1 12 VDC (24 VDC) �------< :--11-------� PB1 ___L_ PB2 CR1 Fig. 2-47 Two Pushbutton Circuit CR1 LT1 ' / 2.1-6 Describe observations when PB 2 is pushed and PB 1 is not pushed in Fig. 2-47. What happens when PB 1 is then pushed? Add a second PB 2 in parallel to the original PB 2. 12 VDC (24 VDC) X2 X1 ,----------<J-----1:111-----<J----------, PB1 -1- PB2a ___L_ PB2b ___L_ CR1 ,___ __ 1 I-------' CR1 LT1 ' / Fig. 2-48 Three Pushbutton Circuit 2.1-7 Describe observation when PB 1 and PB 2 (A or B) are alternately pushed. Next add a second PB 1 in series to the original PB 1. 12 VDC (24 VDC) X2 x.=-1=------------------.n--------1111------n--------� PB1a PB1b PB2a ___L_ PB2b ___L_ CR1 Fig. 2-49 Four Pushbutton Circuit CR1 LT1 ' / 2.1-8 Describe observation when PB 1 (A or B) and PB 2 are alternately pushed.

Solution PreviewSolution Preview

These solutions may offer step-by-step problem-solving explanations or good writing examples that include modern styles of formatting and construction of bibliographies out of text citations and references. Students may use these solutions for personal skill-building and practice. Unethical use is strictly forbidden.

2.1
When SW1 is closed current passes through the circuit and energizes the relay coil. Now the control relay switches are set to operate where ever needed.
Switch position open
NO contacts are still open and current passing not occurs through connection.
NC contacts will be closed and current passing will be passing until it opens.
Switch position is closed
NO contacts are closed and current passes through connection.
NC contacts will be open and current passing will be disconnected immediately.
2.1-1
When the PB1 is pushed the control relay coil will be...

By purchasing this solution you'll be able to access the following files:
Solution.docx.

$40.00
for this solution

or FREE if you
register a new account!

PayPal, G Pay, ApplePay, Amazon Pay, and all major credit cards accepted.

Find A Tutor

View available Electrical Engineering Tutors

Get College Homework Help.

Are you sure you don't want to upload any files?

Fast tutor response requires as much info as possible.

Decision:
Upload a file
Continue without uploading

SUBMIT YOUR HOMEWORK
We couldn't find that subject.
Please select the best match from the list below.

We'll send you an email right away. If it's not in your inbox, check your spam folder.

  • 1
  • 2
  • 3
Live Chats