Chapter 6, Problem 23RQ

Explanation of Solution

a.

Pilot light:

• Pilot light is an output device which turns ON when the rung to which it is connected completes the continuity and energizes the light...

Explanation of Solution

b.

Relay:

• Relay is an output device that converts electrical energy into mechanical actions.
• It turns ON when the rung to which it is connected completes the continuity and energizes the relay...

Explanation of Solution

c.

Motor starter coil:

• Motor starter coil is an output device used to start the output devices such as motors or other rotating machines.
• It turns ON when the rung to which it is connected completes the continuity and energizes the coil...

Explanation of Solution

d.

OL relay contact:

• The Over Load (OL) relay contact is an output module used to protect the output device by preventing excess flow of current into the output device.
• Whenever excess current is passed through the relay, it simply open its c...

Explanation of Solution

e.

Alarm:

• It is an output device that turns ON whenever an emergency condition is needed to stop or run the process...

Explanation of Solution

f.

Heater:

• Heater is an output device that turns ON when it is energized.
• An electrical symbol used to represent heater is shown below...

Explanation of Solution

g.

Solenoid:

• The working of solenoid is based on the principle of magnetic induction.
• It contains a coil, frame, and a plugger known as armature.
• The main function of solenoid is to convert electrical signals into mechanical motion...

Explanation of Solution

h.

Solenoid valve:

• Solenoid valve is an electromechanical device which operates on the principle of magnetic induction.
• It contains a coil, a closed chamber, and an orifice with valve...

Explanation of Solution

i:

Motor:

• A motor is a rotating machine used to convert electrical energy into mechanical actions.
• The working of a motor is based on the principle of electromagnetic induction...

Explanation of Solution

j.

Horn:

• A horn is an output device used instead of a pilot light.
• The horn will blow when the rung of the horn is energized and maintains the continuity...