Industrial Motor Control
7th Edition
ISBN: 9781133691808
Author: Stephen Herman
Publisher: Cengage Learning
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Textbook Question
Chapter 51, Problem 5RQ
Name two types of logic gates that can be used to construct a bounceless switch circuit.
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Reduce the combinational logic circuit in figure 1 to minimum form.
Figure 1
B
C
D
2. In both circuits of this exercise the negative terminals of the sources
are connected to ground. Is this a requirement for nodal analysis? What
would happen to the node voltages if the positions of El and RI in Figure
7.1 were swapped?
Build a ladder logic diagram showing the timer delays.
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- 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 1arrow_forwardWhat is the name of the module that allows the different serial buses in a multiplexed system to communi cate with each other?arrow_forwardRefer to the circuit shown in Figure 336. What is the function of contactor 2L?arrow_forward
- How many layers of semiconductor material are used to construct an SCR?arrow_forwardRefer to the circuit shown in Figure 1123. What is the function of resistor R4 in the circuit?arrow_forwardSápport Supp Suppórt Support 5 Types of External Connections (Pin, Ball in Socket (3D pin), Fix, Roller/Rocker, Sliding Support, Bearing) Question: Choose the type of External Connections for each image above and explain why?arrow_forward
- J 6 Explain the operation of the circuit presented below. For each component, indicate name, drive mode, return mode, etc.arrow_forward5 position and 2-way type of ports DCV could be used in the double acting actuator circuit. Select one: True Falsearrow_forwardRefer to the circuit shown in Figure 42–21. Assume that a fused jumper is connected across terminals 1 and 3 of TR2 timer. What would happen if the jumper were left in place and the FIRST SPEED push button pressed? The motor would start in its lowest speed and progress to second speed, but never increase to third speed. The motor would start operating immediately in third speed. The motor would not start. The motor would start in second speed and then increase to third speed.arrow_forward
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