1. Consider the diagram involving a staircase light control using two switches. The staircase bulb should come ON if any one of the switch is operated and if any one of the switch is operated again the bulb should go OFF. The figure below shows the control implemented as a wiring diagram using two switches (switch 1 is on the lower floor of the staircase and switch 2 is installed at the upper floor of the staircase) and a light bulb. Initially, Switch 1 and Switch 2 are in the OFF position. If Switch 1 is actuated, then the upper circuit will switch ON the bulb. If switch 2 is actuated it will open the upper circuit and close the bottom circuit. However, switch 1 is already open at the bottom circuit, so the bulb will not glow. Actuating switch 1 again will close the bottom circuit and the bulb will glow. Let the following symbols be representative of the switches if the set-up is implemented with PLC. ||-- (normally open contact) /I-- (normally closed contact). How many normally open contact switches will be needed? SWITCH 1 SWITCH 2 BULB O 1 O 2 O 3 O 4

1. Consider the diagram involving a staircase light control using two switches. The staircase bulb should come ON if any one of the switch is operated and if any one of the switch is operated again the bulb should go OFF. The figure below shows the control implemented as a wiring diagram using two switches (switch 1 is on the lower floor of the staircase and switch 2 is installed at the upper floor of the staircase) and a light bulb. Initially, Switch 1 and Switch 2 are in the OFF position. If Switch 1 is actuated, then the upper circuit will switch ON the bulb. If switch 2 is actuated it will open the upper circuit and close the bottom circuit. However, switch 1 is already open at the bottom circuit, so the bulb will not glow. Actuating switch 1 again will close the bottom circuit and the bulb will glow. Let the following symbols be representative of the switches if the set-up is implemented with PLC. ||-- (normally open contact) /I-- (normally closed contact). How many normally open contact switches will be needed? SWITCH 1 SWITCH 2 BULB O 1 O 2 O 3 O 4

Introductory Circuit Analysis (13th Edition)

13th Edition

ISBN:9780133923605

Author:Robert L. Boylestad

Publisher:Robert L. Boylestad

Chapter1: Introduction

Section: Chapter Questions

Problem 1P: Visit your local library (at school or home) and describe the extent to which it provides literature...

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Concept explainers

KVL and KCL

KVL stands for Kirchhoff voltage law. KVL states that the total voltage drops around the loop in any closed electric circuit is equal to the sum of total voltage drop in the same closed loop.

Sign Convention

Science and technology incorporate some ideas and techniques of their own to understand a system skilfully and easily. These techniques are called conventions. For example: Sign conventions of mirrors are used to understand the phenomenon of reflection and refraction in an easier way.

Question

solve solve solve

1. Consider the diagram involving a staircase light control using two
switches. The staircase bulb should come ON if any one of the switch is
operated and if any one of the switch is operated again the bulb should go
OFF. The figure below shows the control implemented as a wiring diagram
using two switches (switch 1 is on the lower floor of the staircase and
switch 2 is installed at the upper floor of the staircase) and a light bulb.
Initially, Switch 1 and Switch 2 are in the OFF position. If Switch 1 is
actuated, then the upper circuit will switch ON the bulb. If switch 2 is
actuated it will open the upper circuit and close the bottom circuit.
However, switch 1 is already open at the bottom circuit, so the bulb will not
glow. Actuating switch 1 again will close the bottom circuit and the bulb
will glow. Let the following symbols be representative of the switches if
the set-up is implemented with PLC. ||-- (normally open contact) |/|--
(normally closed contact) . How many normally open contact switches will
be needed?
SWITCH 1
SWITCH 2
BULB
1
O 2
Оз
O 4

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