a. Mechanical timing relays: The main purpose of mechanical timing relays is to delay the opening and closing of contacts for circuit control. Its operation is almost similar to that of a control relay. The only difference is that the contacts of a mechanical timing relay are used to operate at a preset time interval, that is, after the coil is energized or de-energized. One example for mechanical timing relay is Pneumatic timing relay. There are two different arrangements for mechanical timing relays, such as on-delay timer and off-delay timer. Each type will have different kinds of contacts such as closed contacts and open contacts.

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Answer 1

Question

Chapter 7, Problem 2RQ

Program Plan Intro

a.

Mechanical timing relays:

The main purpose of mechanical timing relays is to delay the opening and closing of contacts for circuit control.

Its operation is almost similar to that of a control relay.

The only difference is that the contacts of a mechanical timing relay are used to operate at a preset time interval, that is, after the coil is energized or de-energized.

One example for mechanical timing relay is Pneumatic timing relay.

There are two different arrangements for mechanical timing relays, such as on-delay timer and off-delay timer.

Each type will have different kinds of contacts such as closed contacts and open contacts.

Explanation of Solution

b.

Normally Closed Timed Open (NCTO) contact:

The symbol used to represent a NCTO contact is given below.

Explanation of Solution

c.

Normally Open Timed Open (NOTO) contact:

The symbol used to represent a NOTO contact is given below.

NOTO contact is an off-delay time based contact...

Explanation of Solution

d.

Normally Closed Timed Closed (NCTC) contact:

The symbol used to represent a NCTC contact is given below.

NCTC contact is an off-delay time based contact...

Expert Solution & Answer

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Answer 2

Question

Chapter 7, Problem 2RQ

Program Plan Intro

a.

Mechanical timing relays:

The main purpose of mechanical timing relays is to delay the opening and closing of contacts for circuit control.

Its operation is almost similar to that of a control relay.

The only difference is that the contacts of a mechanical timing relay are used to operate at a preset time interval, that is, after the coil is energized or de-energized.

One example for mechanical timing relay is Pneumatic timing relay.

There are two different arrangements for mechanical timing relays, such as on-delay timer and off-delay timer.

Each type will have different kinds of contacts such as closed contacts and open contacts.

Explanation of Solution

b.

Normally Closed Timed Open (NCTO) contact:

The symbol used to represent a NCTO contact is given below.

Explanation of Solution

c.

Normally Open Timed Open (NOTO) contact:

The symbol used to represent a NOTO contact is given below.

NOTO contact is an off-delay time based contact...

Explanation of Solution

d.

Normally Closed Timed Closed (NCTC) contact:

The symbol used to represent a NCTC contact is given below.

NCTC contact is an off-delay time based contact...

Expert Solution & Answer

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See solution

Answer 3

Question

Chapter 7, Problem 2RQ

Program Plan Intro

a.

Mechanical timing relays:

The main purpose of mechanical timing relays is to delay the opening and closing of contacts for circuit control.

Its operation is almost similar to that of a control relay.

The only difference is that the contacts of a mechanical timing relay are used to operate at a preset time interval, that is, after the coil is energized or de-energized.

One example for mechanical timing relay is Pneumatic timing relay.

There are two different arrangements for mechanical timing relays, such as on-delay timer and off-delay timer.

Each type will have different kinds of contacts such as closed contacts and open contacts.

Explanation of Solution

b.

Normally Closed Timed Open (NCTO) contact:

The symbol used to represent a NCTO contact is given below.

Explanation of Solution

c.

Normally Open Timed Open (NOTO) contact:

The symbol used to represent a NOTO contact is given below.

NOTO contact is an off-delay time based contact...

Explanation of Solution

d.

Normally Closed Timed Closed (NCTC) contact:

The symbol used to represent a NCTC contact is given below.

NCTC contact is an off-delay time based contact...

Expert Solution & Answer

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Check out a sample textbook solution

See solution

Answer 4

Question

Chapter 7, Problem 2RQ

Program Plan Intro

a.

Mechanical timing relays:

The main purpose of mechanical timing relays is to delay the opening and closing of contacts for circuit control.

Its operation is almost similar to that of a control relay.

The only difference is that the contacts of a mechanical timing relay are used to operate at a preset time interval, that is, after the coil is energized or de-energized.

One example for mechanical timing relay is Pneumatic timing relay.

There are two different arrangements for mechanical timing relays, such as on-delay timer and off-delay timer.

Each type will have different kinds of contacts such as closed contacts and open contacts.

Explanation of Solution

b.

Normally Closed Timed Open (NCTO) contact:

The symbol used to represent a NCTO contact is given below.

Explanation of Solution

c.

Normally Open Timed Open (NOTO) contact:

The symbol used to represent a NOTO contact is given below.

NOTO contact is an off-delay time based contact...

Explanation of Solution

d.

Normally Closed Timed Closed (NCTC) contact:

The symbol used to represent a NCTC contact is given below.

NCTC contact is an off-delay time based contact...

Expert Solution & Answer

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Check out a sample textbook solution

See solution

Answer 5

Chapter 7, Problem 2RQ

Program Plan Intro

a.

Mechanical timing relays:

The main purpose of mechanical timing relays is to delay the opening and closing of contacts for circuit control.

Its operation is almost similar to that of a control relay.

The only difference is that the contacts of a mechanical timing relay are used to operate at a preset time interval, that is, after the coil is energized or de-energized.

One example for mechanical timing relay is Pneumatic timing relay.

There are two different arrangements for mechanical timing relays, such as on-delay timer and off-delay timer.

Each type will have different kinds of contacts such as closed contacts and open contacts.

Explanation of Solution

b.

Normally Closed Timed Open (NCTO) contact:

The symbol used to represent a NCTO contact is given below.

Explanation of Solution

c.

Normally Open Timed Open (NOTO) contact:

The symbol used to represent a NOTO contact is given below.

NOTO contact is an off-delay time based contact...

Explanation of Solution

d.

Normally Closed Timed Closed (NCTC) contact:

The symbol used to represent a NCTC contact is given below.

NCTC contact is an off-delay time based contact...

Answer 6

Chapter 7, Problem 2RQ

Program Plan Intro

a.

Mechanical timing relays:

The main purpose of mechanical timing relays is to delay the opening and closing of contacts for circuit control.

Its operation is almost similar to that of a control relay.

The only difference is that the contacts of a mechanical timing relay are used to operate at a preset time interval, that is, after the coil is energized or de-energized.

One example for mechanical timing relay is Pneumatic timing relay.

There are two different arrangements for mechanical timing relays, such as on-delay timer and off-delay timer.

Each type will have different kinds of contacts such as closed contacts and open contacts.

Answer 7

Chapter 7, Problem 2RQ

Program Plan Intro

a.

Mechanical timing relays:

The main purpose of mechanical timing relays is to delay the opening and closing of contacts for circuit control.

Its operation is almost similar to that of a control relay.

The only difference is that the contacts of a mechanical timing relay are used to operate at a preset time interval, that is, after the coil is energized or de-energized.

One example for mechanical timing relay is Pneumatic timing relay.

There are two different arrangements for mechanical timing relays, such as on-delay timer and off-delay timer.

Each type will have different kinds of contacts such as closed contacts and open contacts.

Answer 8

Explanation of Solution

b.

Normally Closed Timed Open (NCTO) contact:

The symbol used to represent a NCTO contact is given below.

Answer 9

Explanation of Solution

b.

Normally Closed Timed Open (NCTO) contact:

The symbol used to represent a NCTO contact is given below.

Answer 10

Explanation of Solution

c.

Normally Open Timed Open (NOTO) contact:

The symbol used to represent a NOTO contact is given below.

NOTO contact is an off-delay time based contact...

Answer 11

Explanation of Solution

c.

Normally Open Timed Open (NOTO) contact:

The symbol used to represent a NOTO contact is given below.

NOTO contact is an off-delay time based contact...

Answer 12

Explanation of Solution

d.

Normally Closed Timed Closed (NCTC) contact:

The symbol used to represent a NCTC contact is given below.

NCTC contact is an off-delay time based contact...

Answer 13

Explanation of Solution

d.

Normally Closed Timed Closed (NCTC) contact:

The symbol used to represent a NCTC contact is given below.

NCTC contact is an off-delay time based contact...

Answer 14

Expert Solution & Answer

Answer 15

Expert Solution & Answer

Answer 16

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Answer 17

Ch. 7 - Prob. 1RQ Ch. 7 - Prob. 2RQ Ch. 7 - Prob. 3RQ Ch. 7 - Prob. 4RQ Ch. 7 - a. What are the two methods commonly used to...Ch. 7 - Prob. 6RQ Ch. 7 - Prob. 7RQ Ch. 7 - Prob. 8RQ Ch. 7 - For a TOF timer: a. When is the enable bit of a...Ch. 7 - Explain what each of the following quantities...

Concept explainers

Explanation of Solution

b.

Normally Closed Timed Open (NCTO) contact:

The symbol used to represent a NCTO contact is given below.

Explanation of Solution

c.

Normally Open Timed Open (NOTO) contact:

The symbol used to represent a NOTO contact is given below.

NOTO contact is an off-delay time based contact...

Explanation of Solution

d.

Normally Closed Timed Closed (NCTC) contact:

The symbol used to represent a NCTC contact is given below.

NCTC contact is an off-delay time based contact...

Want to see the full answer?

Chapter 7 Solutions

Concept explainers

Explanation of Solution

b. Normally Closed Timed Open (NCTO) contact: The symbol used to represent a NCTO contact is given below.

Explanation of Solution

c. Normally Open Timed Open (NOTO) contact: The symbol used to represent a NOTO contact is given below. NOTO contact is an off-delay time based contact...

Explanation of Solution

d. Normally Closed Timed Closed (NCTC) contact: The symbol used to represent a NCTC contact is given below. NCTC contact is an off-delay time based contact...

Want to see the full answer?

Chapter 7 Solutions

b.

Normally Closed Timed Open (NCTO) contact:

The symbol used to represent a NCTO contact is given below.

c.

Normally Open Timed Open (NOTO) contact:

The symbol used to represent a NOTO contact is given below.

NOTO contact is an off-delay time based contact...

d.

Normally Closed Timed Closed (NCTC) contact:

The symbol used to represent a NCTC contact is given below.

NCTC contact is an off-delay time based contact...