Understanding Motor Controls
4th Edition
ISBN: 9781337798686
Author: Stephen L. Herman
Publisher: Delmar Cengage Learning
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Question
Chapter 53, Problem 1RQ
To determine
The identification of the pin 1 of an in line integrated circuit.
Expert Solution & Answer
Explanation of Solution
Identifying the left hand side of the IC is done by looking for a notch on the top of the package. The top left pin is pin1 which is sometimes identified with a small dot next to it. 555 timer is an integrated circuit with eight pins which is widely used in industrial electronics.
The presence of a notch at an end or dot on one pin gives the identification of the pin 1. Thus, a notch or a dot is used to identify the pin 1 in 555 timer.
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Students have asked these similar questions
Define the term redundant?
Name
Section 5-2: Line Diagrams-Signals,
Decisions, and Actions
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
2
L1
FAN
TEMPERATURE
SWITCH
TR
HEATING
ELEMENTS
FLOW
SWITCH
-HOT AIR
PADDLE
AIR FILTER
NORMALLY CLOSED
FLOW SWITCH
65
ALARM
(SOUNDS IF NO FLOW FOR
15 SECONDS OR MORE)
Date
HEATING
CONTACTOR
TR
ON-DELAY
TIMER
SUPPLY AIR
COLD AIR
(3) TIME SET= 15 SEC
© 2014 American Technical Publishers, Inc.
All rights reserved
Q1
---- -
Reduce the combinational logic circuit in figure 1 to minimum form.
Figure 1
B
C
D
Chapter 53 Solutions
Understanding Motor Controls
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