1、 NEMA TS 4 HARDWARE STANDARDS FOR DYNAMIC MESSAGE SIGNS (DMS) WITH NTCIP REQUIREMENTS NEMA Standards Publication TS 4-2005 Hardware Standards for Dynamic Message Signs (DMS) With NTCIP Requirements Published by: National Electrical Manufacturers Association 1300 North 17th Street, Suite 1847 Rosslyn
2、, Virginia 22209 www.nema.org Copyright 2005 by the National Electrical Manufacturers Association. All rights including translation into other languages, reserved under the Universal Copyright Convention, the Berne Convention for the Protection of Literary and Artistic Works, and the International a
3、nd Pan American Copyright Conventions. NOTICE AND DISCLAIMER The information in this publication was considered technically sound by the consensus of persons engaged in the development and approval of the document at the time it was developed. Consensus does not necessarily mean that there is unanim
4、ous agreement among every person participating in the development of this document. The National Electrical Manufacturers Association (NEMA) standards and guideline publications, of which the document contained herein is one, are developed through a voluntary consensus standards development process.
5、 This process brings together volunteers and/or seeks out the views of persons who have an interest in the topic covered by this publication. While NEMA administers the process and establishes rules to promote fairness in the development of consensus, it does not write the document and it does not i
6、ndependently test, evaluate, or verify the accuracy or completeness of any information or the soundness of any judgments contained in its standards and guideline publications. NEMA disclaims liability for any personal injury, property, or other damages of any nature whatsoever, whether special, indi
7、rect, consequential, or compensatory, directly or indirectly resulting from the publication, use of, application, or reliance on this document. NEMA disclaims and makes no guaranty or warranty, express or implied, as to the accuracy or completeness of any information published herein, and disclaims
8、and makes no warranty that the information in this document will fulfill any of your particular purposes or needs. NEMA does not undertake to guarantee the performance of any individual manufacturer or sellers products or services by virtue of this standard or guide. In publishing and making this do
9、cument available, NEMA is not undertaking to render professional or other services for or on behalf of any person or entity, nor is NEMA undertaking to perform any duty owed by any person or entity to someone else. Anyone using this document should rely on his or her own independent judgment or, as
10、appropriate, seek the advice of a competent professional in determining the exercise of reasonable care in any given circumstances. Information and other standards on the topic covered by this publication may be available from other sources, which the user may wish to consult for additional views or
11、 information not covered by this publication. NEMA has no power, nor does it undertake to police or enforce compliance with the contents of this document. NEMA does not certify, test, or inspect products, designs, or installations for safety or health purposes. Any certification or other statement o
12、f compliance with any health or safetyrelated information in this document shall not be attributable to NEMA and is solely the responsibility of the certifier or maker of the statement. TS 4-2005 Page i Copyright 2005 by the National Electrical Manufacturers Association. CONTENTS Page Foreword vii H
13、istory and Acknowledgementsviii Section 1 GENERAL 1.1 Scope and Introduction 1 1.2 General Statements. 2 1.3 Types of DMS Signs 2 1.3.1 Variable Message Signs (VMS) 2 1.3.2 Changeable Message Signs . 2 1.3.3 Blankout Signs 3 1.4 Types of Technologies 3 1.5 References 3 1.6 Authorized Engineering Inf
14、ormation 4 1.7 Glossary of DMS Terms 5 Section 2 ENVIRONMENTAL REQUIREMENTS 2.1 Environmental and Operating Standards 20 2.1.1 Definitions of Major Units of the DMS Equipment. 20 2.1.2 Compliance of Major Units 20 2.1.3 Electrical21 2.1.4 Transients 22 2.1.5 Temperature and Humidity 23 2.1.6 Vibrati
15、on 24 2.1.7 Shock 24 2.1.8 Time and Timing . 25 2.2 DMS Equipment Tests.25 2.2.1 Test Facilities (Except Vibration and Shock) 25 2.2.2 Test Unit 25 2.2.3 Test Functions. 26 2.2.4 Tests For Transients, Temperature, Voltage, and Humidity. 26 2.2.5 Test J: Vibration Test . 32 2.2.6 Test K: Shock (Impac
16、t) Test. 33 2.2.7 Test L: Power Interrupt Tests. 34 2.2.8 Test M: Timing Accuracy Tests 35 Section 3 SIGN MECHANICAL CONSTRUCTION 3.1 General 37 3.1.1 Weather-Tight Enclosure 37 3.1.2 Temperature Control. 37 3.1.3 Sign Face 38 3.1.4 Galvanic Protection . 38 3.1.5 Light Leaks 38 3.1.6 Contrast Border
17、. 38 3.2 Fixed-Location Dynamic Message Signs 38 3.2.1 Structural Integrity . 39 3.2.2 Aluminum Housings 39 3.2.3 Housings Made of Other Materials . 40 3.2.4 Front and Rear Access Front and Rear Access DMS 40 3.2.5 Front Access DMS 40 3.2.6 Rear Access DMS. 40 TS 4-2005 Page ii Copyright 2005 by the
18、 National Electrical Manufacturers Association. 3.2.7 Walk-In Access DMS 40 3.2.8 Convenience Outlets, All Housings. 41 3.3 Portable DMS 42 3.3.1 Transport Safety 42 3.3.2 Structural Integrity . 42 3.3.3 Major Subsystems. 43 3.3.4 Corrosion Protection and Finishes 43 3.3.5 Power Sources 44 Section 4
19、 CONTROLLER TO SIGN INTERFACE 4.1 Interface with Sign Housing.45 4.2 Wiring 45 4.3 Wire Entrances 45 4.4 Pixel Control Wiring. 45 4.4.1 Power Supply Locations 45 4.4.2 DMS Controller and Driver Module Locations 46 Section 5 DISPLAY PROPERTIES 5.1 General 47 5.1.1 Development Sources. 47 5.1.2 Legibi
20、lity Versus Visibility 47 5.1.3 Photometric and Colorimetric Requirements 47 5.2 Contrast Ratio 47 5.3 Cone of Vision Type Classification 49 5.3.1 Light Emitting Technology. 49 5.3.2 Reflective Technology. 49 5.3.3 Hybrid Technology 49 5.4 Luminance Intensity Requirements. 50 5.4.1 Luminous Intensit
21、y Uniformity. 53 5.5 Chromaticity Classifications and Limits. 53 5.5.1 Chromaticity Limits 53 5.5.2 Chromaticity Uniformity. 56 5.6 Display Characters 56 5.6.1 Fonts and Font Alphabets. 56 5.6.2 Required Fonts by Sign Type 56 5.7 Display Change Time 57 5.8 Moving Arrows. 57 5.9 Test Methods. 58 5.9.
22、1 General Test Parameters 58 5.9.2 Test Area. 59 5.9.3 Considerations for Precision and Bias of Test Methods and Accuracy of Test Results . 61 Section 6 OPTICAL COMPONENTS 6.1 General 62 6.1.1 Pixel Spacing. 62 6.1.2 Character Module Spacing . 62 6.1.3 Interchangeability of Character Modules 62 6.1.
23、4 Character Module Replacement . 63 6.2 Shuttered Fiber Optic Light System 63 6.2.1 General 63 6.2.2 Fiberoptic Harnesses 63 6.2.3 Lamp Assembly. 63 6.2.4 Light Filter63 6.2.5 Shutter System 64 6.3 LED Light System 64 TS 4-2005 Page iii Copyright 2005 by the National Electrical Manufacturers Associa
24、tion. 6.3.1 General 64 6.3.2 LED Selection 64 6.3.3 LED Use 64 6.4 Fiber Optic Hybrid Light System 64 6.4.1 General 64 6.4.2 Requirements 64 6.5 LED Hybrid Light System 65 6.5.1 General 65 6.5.2 Requirements 65 Section 7 DMS CONTROLLER CABINET 7.1 General 66 7.2 Cabinet Design 66 7.2.1 Layout66 7.2.
25、2 Protection 66 Section 8 ELECTRONICS AND ELECTRICAL 8.1 Electronic Components .67 8.1.1 General 67 8.1.2 Interchangeability 67 8.2 Components 67 8.2.1 General 67 8.2.2 Electronic Components. 67 8.2.3 Capacitors . 68 8.2.4 Potentiometers 68 8.2.5 Resistors . 68 8.2.6 Semiconductor Devices 68 8.2.7 T
26、ransformers and Inductors 68 8.2.8 Triacs. 68 8.2.9 Circuit Breakers. 68 8.2.10 Fuses. 68 8.2.11 Switches 69 8.2.12 Wiring, Cabling, and Harnesses . 69 8.2.13 Controller Indicators and Character Displays . 69 8.2.14 Connectors 69 8.3 Mechanical Requirements. 69 8.3.1 Assemblies 69 8.3.2 PCB Design a
27、nd Connectors 69 8.3.3 Model Numbers. 70 8.4 Printed Circuit Boards 70 8.4.1 Design, Fabrication, and Mounting . 70 8.4.2 Soldering . 70 8.5 Location and Provisions of Driving Electronics . 70 8.5.1 General 70 8.5.2 Shuttered Fiber Optic Signs 70 8.5.3 LED Signs . 70 8.5.4 Fiberoptic Hybrid Signs. 7
28、0 8.5.5 LED Hybrid Signs 70 8.6 Cabinet Wiring . 71 8.7 Communication 71 8.7.1 Communication Interfaces 71 8.7.2 Communications . 71 8.8 Brightness Controls . 71 8.8.1 Ambient Light Sensing and Dimming Control . 72 8.9 DMS Controller Electronics . 72 8.9.1 General 72 TS 4-2005 Page iv Copyright 2005
29、 by the National Electrical Manufacturers Association. 8.9.2 Central Processor Unit 72 8.9.3 Input/Output. 72 8.9.4 Internal Clock 72 8.9.5 Watchdog Timer 73 8.9.6 Loss of Power . 73 8.9.7 Communications Link Monitor. 73 8.9.8 Manual Test Interface . 73 8.9.9 Controller Reset Switch. 73 8.10 Control
30、ler Functions 73 8.10.1 General 73 8.10.2 Control Architectures. 73 8.10.3 Common Functionality 74 8.10.4 Centralized Messaging Architecture . 74 8.10.5 Local Messaging Architecture. 74 8.10.6 Display Writing 75 8.10.7 NTCIP Protocol and Command Sets 75 8.10.8 Other Protocols and Command Sets 75 8.1
31、1 Local Control 75 Section 9 PERFORMANCE MONITORING 9.1 Display Diagnostics and Monitoring 76 9.1.1 Incandescent Lamp Tests. 76 9.1.2 Shutter and Disk Monitoring Pixel Service 76 9.1.3 LED Pixel Tests. 76 9.1.4 LED Temperature Monitor. 76 9.2 Controller Diagnostics and Monitoring 77 9.2.1 Watchdog T
32、imer 77 9.2.2 Results of Controller Failures 77 9.2.3 Power Line Failures 77 9.2.4 Communication Link Failures 77 9.2.5 Subsystem Component Communications. 77 9.3 Error and Failure Log. 77 9.4 Message Verification . 78 Section 10 POWER REQUIREMENTS 10.1 AC or DC Electrical Service 79 10.2 Power Pane
33、ls for AC Only. 79 10.2.1 Minimum Requirements 79 10.2.2 Service Drop Advisory. 79 10.3 Distribution Panels for DC . 79 10.4 Ground to Neutral Isolation .79 10.5 Surge Protection Device 79 10.6 Convenience Outlets AC Only. 79 10.7 Calculated Electrical Load. 80 Section 11 CONFORMANCE 11.1 General 81
34、 11.1.1 Involved Parties. 81 11.1.2 Other . 81 11.2 Conformance Document Types. 81 11.2.1 Certificates 81 11.2.2 Conformance Testing 81 11.2.3 Statement 81 11.2.4 Inspections 82 11.2.5 Evaluation 82 11.3 Requirements 82 TS 4-2005 Page v Copyright 2005 by the National Electrical Manufacturers Associa
35、tion. 11.3.1 Mandatory . 82 11.3.2 Optional. 82 11.4 Conformance Documentation Requirements. 82 11.5 Conformance Table 83 Section 12 DOCUMENTATION 12.1 Drawing Documentation 90 12.1.1 System Diagrams 90 12.1.2 Wiring Diagrams 90 12.1.3 Mechanical Drawings 90 12.2 Site Specific Documentation . 90 12.
36、2.1 Conformance table checklist. 90 12.2.2 NTCIP MIB file. 90 12.2.3 As-built Documentation. 90 12.2.4 Configuration Information 91 12.2.5 Rev Numbers 91 12.2.6 Test Results 91 12.2.7 Product Burn-In . 91 12.3 Manuals . 91 12.3.1 Service 91 12.3.2 Troubleshooting 91 12.3.3 Operators Manual. 91 12.4
37、Warranty Documentation. 91 Figures 2-1 Compliance of Major Units . 21 2-2 Operating Voltages. 21 2-3 Transient Requirements . 23 2-4 Wet-Bulb, Dry-Bulb Relative Humidity at Barometric Pressure of 29.92 in. of Mercury 21 2-5 Test Functions 26 5-1 Geometric Configuration of Test Equipment for Determin
38、ation of Luminance and Contrast for All Technologies and Chromaticity of Light Emitting and Hybrid Technologies 58 5-2 Geometric Configuration of Test Equipment for Determination of Chromaticity of Reflective Technology . 58 5-3 Layout Examples for a Test Module and the Positioning of the Measuring
39、Area (Circle) 60 Tables 2-1 Test Profile 29 2-2 Operating Voltages. 20 2-3 Transient Requirements . 22 2-4 Wet-Bulb Dry-Bulb Relative Humidity At Barometric Pressure of 29.92 In. Hg. 23 5-1 Minimum Contrast Ratio Requirements, Yellow. 48 5-2 Minimum Contrast Ratio Requirements, White. . 48 5-3 Minim
40、um Contrast Ratio Requirements, White/Yellow. . 48 5-4 Minimum Contrast Ratio Requirements, Green . 48 5-5 Minimum Contrast Ratio Requirements, Red. 48 5-6 Minimum Contrast Ratio Requirements, Blue 49 5-7 Cone of Vision Type Classification. 50 5-8 Luminance Intensity Limits in CD/M2for On-Axis (0oHo
41、rizontal, 0oVertical) Test Anglesfor Yellow . 51 5-9 Luminance Intensity Limits in Cd/M2for On-Axis (0oHorizontal, 0oVertical) Test Anglesfor White. 51 5-10 Luminance Intensity Limits in Cd/M2for On-Axis (0oHorizontal, 0oVertical) Test Anglesfor White/Yellow. 51 5-11 Luminance Intensity Limits in Cd
42、/M2for On-Axis (0oHorizontal, 0oVertical) TS 4-2005 Page vi Copyright 2005 by the National Electrical Manufacturers Association. Test Anglesfor Green 52 5-12 Luminance Intensity Limits in Cd/M2for On-Axis (0oHorizontal, 0oVertical) Test Anglesfor Yellow/Green 52 5-13 Luminance Intensity Limits in Cd
43、/M2for On-Axis (0oHorizontal, 0oVertical) Test Anglesfor Red . 52 5-14 Luminance Intensity Limits in Cd/M2for On-Axis (0oHorizontal, 0oVertical) Test Anglesfor Orange 53 5-15 Luminance Intensity Limits in Cd/M2for On-Axis (0oHorizontal, 0oVertical) Test Anglesfor Blue. 53 5-16 Chromaticity Limits fo
44、r Light Emitting DMS Technology . 54 5-17 Chromaticity Limits for Reflective DMS Technology . 55 5-18 Chromaticity Limits for Hybrid DMS Technology. 55 TS 4-2005 Page vii Copyright 2005 by the National Electrical Manufacturers Association. FOREWORD This NEMA Standards Publication, TS 4-2004, Hardwar
45、e Standards for Dynamic Message Signs (DMS), with NTCIP Requirements, was developed as a design and implementation guide for dynamic traffic messaging equipment that can be safely installed and provided to the end user with operational features based on current technology. Within the standard, any r
46、eference to a specific manufacturer is strictly for the purpose of defining interchangeability where there exists no nationally recognized standard covering all the requirements. The manufacturer references do not constitute a preference. The TS 4 Standards Publication is intended to reduce hazards
47、to persons and property when traffic-messaging equipment is properly selected and installed in conformance with the requirements herein. The users attention is called to the possibility that compliance with this standard may require use of an invention covered by patent rights. By publication of thi
48、s standard, no position is taken with respect to the validity of any claims or of any patent rights in connection therewith. In the preparation of this Standards Publication, input of users and other interested parties has been sought and evaluated. Inquiries, comments, and proposed or recommended r
49、evisions should be submitted to the concerned NEMA product Subdivision by contacting the: Vice President, Technical Services National Electrical Manufacturers Association 1300 North 17th Street Rosslyn, Virginia 22209 The Dynamic Message Sign Technical Committee developed this standard at the request of the NEMA Transportation Management Systems and Associated Control Devices Section of which it is a part. Section approval of the standard does not necessarily imply that all Section members voted for its approval or participated in its development. At the time it wa
