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Rockwell Automation System Design for the Control of Electrical Noise manuály

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Rockwell automation System Design for the Control of Electrical Noise Uživatelský manuál (127 strany)


Značka: Rockwell-automation | Kategorie: Zařízení | Velikost: 9.91 MB |

 

Tabulka s obsahem

System Design for

1

Control of

1

Electrical Noise

1

Important User Information

2

Table of Contents

3

Table of Contents iii

5

Appendix A

6

Appendix B

6

Who Should Use this

7

Purpose of this Manual

7

Contents of this Manual

8

Related Documentation

9

Conventions Used in this

9

P-4 Preface

10

Chapter Objectives

11

What is Electrical Noise?

11

Understanding the Need for

11

Electrical Noise Control

11

Noise Control Basics

12

Figure 1.1

13

Figure 1.2

13

Coupling Mechanisms

14

Capacitance

15

Mutual Inductance

15

Solutions for Reducing

16

Implementation

17

Measuring Effectiveness

17

High Frequency (HF) Bonding

19

Noise Example 1

20

Noise Example 2

21

The Ground Plane Principle

21

Figure 2.3

22

Figure 2.4

23

Noise Solutions Using the

24

Ground Plane Principle

24

Painted Components

25

Anodized Aluminum Components

25

EMC Filters

25

Adjacent Panels

26

Grid and Raised Floor

27

Mezzanine Floor

28

Machine Structure

29

Panel ground plane

29

New Buildings

30

Existing Buildings

31

Grounding (Safety Earth)

32

Understanding the

33

Segregation Concept

33

Zone Classification

34

Component Categories

35

Routing Wires and Cables

36

Within a Panel

36

Figure 3.3

37

Routing very-dirty cables

37

Wire and Cable Categories

38

Data/Communications Cables

39

Routing System Wires and

40

Cables Between Panels

40

Shielding Concept

41

Ferrite Sleeves

42

Figure 4.3

43

Figure 4.4

43

Mixing Categories

44

Figure 4.5

45

Figure 4.6

45

Filtering Noise

47

IMPORTANT

48

Filter Performance

49

Performance Test Set-up

50

Test Results

50

Ultrasonic Transducers

51

Xenon Flashing Beacons

51

(strobe lights)

51

Earth Leakage/Ground Fault

52

Contact Suppression

53

Figure 6.1

54

RC suppressor circuit

54

Figure 6.2

54

Understanding Contact

55

Suppression for 24V dc

55

Circuits

55

Figure 6.7

57

Figure 6.8

57

Figure 6.9

58

Power Distribution

59

Figure 7.1

60

Filter test set-up

60

Figure 7.2

60

Transformers

61

Single Phase Power

62

24V dc Power Supplies

62

24V dc Distribution

63

24V dc PSU Zoning Methods

63

Figure 7.5

64

Figure 7.6

65

Filter between zones

65

Figure 7.7

66

Linear PSU

67

Figure 7.9

68

PSU mounted in Dirty Zone

68

Floating Requirement

69

Figure 7.11

70

Separate Clean Zones

70

Long Power Cable Runs

71

7-14 Power Distribution

72

Motor Wiring

73

Shielding Motor Power

74

Grounding Motor Power

74

Cable Shields

74

Applying Ferrite Sleeves

75

Splicing Motor Power

75

Handling Excess Cable

76

Installing Long Motor

76

Understanding Registration

77

Noise Reduction Methods

78

Figure 9.1

79

Figure 9.2

79

Registration power filter

79

Dedicated Power Supply

80

Detection Device Mounting

80

Signal Noise Filter Options

81

To Registration Inputs

83

From Detector

83

Registration Error

84

Error Compensation

85

Software Solutions

85

Encoders

87

Mounting

88

Power Supply Wiring

89

10-4 Encoders

90

E-Field Sniffing Method

93

H-Field Sniffing Method

94

Measuring AC Circuits

95

Figure 11.4

96

Ground Loops

97

Differential Measurements

97

Differential Scope Inputs

98

Scope Probe Lead Extension

99

General Guidelines for

100

Measuring Noise

100

Field Strength Meters

101

Monitoring for Noise

101

Monitoring Systems

102

Monitoring Panels

102

Noise Control Supplement

103

A-2 Noise Control Supplement

104

Noise Control Supplement A-3

105

A-4 Noise Control Supplement

106

Wire Segregation Test

107

A-6 Noise Control Supplement

108

Conclusions

109

Switch-Mode DC Power

110

Supplies

110

Grounding the Common

111

Figure A.8

112

Figure A.9

112

Grounded common

112

DC Filtering

113

AC Line Filters

114

Using a Dynamic Braking

115

Contactor

115

Figure A.13

116

Bonding Surfaces

117

Noise Checklist

118

EMC Product Suppliers

119

B-2 EMC Product Suppliers

120

I-2 Index

122

Index I-3

123

I-4 Index

124

Index I-5

125

I-6 Index

126




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