NEMA TS 4-2016 Hardware Standards for Dynamic Message Signs (DMS) with NTCIP Requirements.pdf

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1、NEMA Standards PublicationNational Electrical Manufacturers AssociationNEMA TS 4-2016Hardware Standards for Dynamic Message Signs (DMS) with NTCIP RequirementsNEMA Standards Publication TS 4-2016 Hardware Standards for Dynamic Message Signs (DMS) with NTCIP Requirements Published by: National Electr

2、ical Manufacturers Association 1300 North 17thStreet, Suite 900 Rosslyn, Virginia 22209 www.nema.org 2016 National Electrical Manufacturers Association. All rights including translation into other languages, reserved under the Universal Copyright Convention, the Berne Convention for the Protection o

3、f Literary and Artistic Works, and the International and Pan American Copyright Conventions. 2016 National Electrical Manufacturers Association NOTICE AND DISCLAIMER The information in this publication was considered technically sound by the consensus of persons engaged in the development and approv

4、al of the document at the time it was developed. Consensus does not necessarily mean that there is unanimous agreement among every person participating in the development of this document. The National Electrical Manufacturers Association (NEMA) standards and guideline publications, of which the doc

5、ument contained herein is one, are developed through a voluntary consensus standards development process. 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 ru

6、les to promote fairness in the development of consensus, it does not write the document and it does not independently 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 liab

7、ility for any personal injury, property, or other damages of any nature whatsoever, whether special, indirect, 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, e

8、xpress or implied, as to the accuracy or completeness of any information published herein, and disclaims 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 manufactu

9、rer or sellers products or services by virtue of this standard or guide. In publishing and making this document 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 enti

10、ty to someone else. Anyone using this document should rely on his or her own independent judgment or, as 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 pu

11、blication may be available from other sources, which the user may wish to consult for additional views or 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

12、products, designs, or installations for safety or health purposes. Any certification or other statement of 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. NEMA TS 4

13、-2016 Page i 2016 National Electrical Manufacturers Association CONTENTS General 1 Section 11.1 Scope and Introduction 1 1.2 References . 1 1.2.1 Normative References . 1 1.2.2 Contacts. 2 1.3 General Statements . 4 1.4 Types of DMS . 4 1.4.1 Dynamic Message Signs (DMS) . 4 1.4.2 Changeable Message

14、Signs 4 1.4.3 Blankout Signs (BOS) 4 1.5 Types of Technologies 5 1.6 Definitions, Terms, and Acronyms 5 Environmental Requirements . 16 Section 22.1 Environmental and Operating Standards . 16 2.1.1 Definitions of Major Units of the DMS Equipment . 16 2.1.2 Compliance of Major Units 16 2.1.3 Electric

15、al 17 2.1.4 Transients 18 2.1.5 Temperature and Humidity 19 2.1.6 Vibration. 19 2.1.7 Shock . 20 2.1.8 Time and Timing 20 2.2 DMS Equipment Tests . 20 2.2.1 Test Facilities (Except Vibration and Shock) . 20 2.2.2 Test Unit 21 2.2.3 Test Functions . 21 2.2.4 Test G: Vibration Test 25 2.2.5 Test H: Sh

16、ock (Impact) Test 26 2.2.6 Test J: Power Interrupt Tests 27 2.2.7 Test K: Timing Accuracy Tests 28 DMS Mechanical Construction . 30 Section 33.1 General . 30 3.1.1 Weather-Tight Enclosure . 30 3.1.2 Temperature Control . 30 3.1.3 DMS Face 31 3.1.4 Galvanic Protection . 31 3.1.5 Light Leaks 31 3.1.6

17、Contrast Border . 31 3.2 Fixed-Location DMS 32 3.2.1 Design Life of Fixed DMS 32 3.2.2 Structural integrity 32 3.2.3 Aluminum Housings . 32 3.2.4 Housings Made of Other Materials 33 3.2.5 Front and Rear Access 33 3.2.6 Front Access DMS . 33 3.2.7 Rear Access DMS . 33 3.2.8 Walk-In Access DMS . 34 NE

18、MA TS 4-2016 Page ii 2016 National Electrical Manufacturers Association 3.2.9 Convenience Outlets, Walk-In Access 35 3.3 Portable DMS . 35 3.3.1 Transport Safety 35 3.3.2 Structural Integrity . 35 3.3.3 Major Subsystems . 36 3.3.4 Corrosion Protection and Finishes 37 3.3.5 Power Sources 37 Controlle

19、r to DMS Interface 38 Section 44.1 Interface with DMS Housing . 38 4.2 Wiring 38 4.3 Wire Entrances 38 4.4 Pixel Control Wiring 38 4.4.1 Power Supply Locations 38 4.4.2 DMS Controller and Driver Module Locations . 39 Display Properties . 40 Section 55.1 General . 40 5.1.1 Development Sources . 40 5.

20、1.2 Legibility versus Visibility . 40 5.1.3 Photometric and Colorimetric Requirements . 40 5.2 Contrast Ratio 40 5.3 Cone of Vision Type Classification . 41 5.3.1 Light Emitting Technology . 43 5.4 Luminance Intensity Requirements . 43 5.4.1 Luminous Intensity Uniformity . 45 5.5 Chromaticity Classi

21、fications and Limits . 46 5.5.1 Chromaticity Limits 46 5.5.2 Chromaticity Uniformity . 46 5.6 Display Characters 46 5.6.1 Fonts and Font Alphabets . 46 5.6.2 Required Fonts by DMS Type . 48 5.7 Display Change Time 52 5.8 Moving arrows . 52 5.9 Test Methods 53 5.9.1 General Test Parameters 53 5.9.2 T

22、est Area . 54 5.9.3 Considerations for Precision and Bias of Test Methods and Accuracy of Test Results55 Optical Components 56 Section 66.1 General . 56 6.1.1 Pixel Spacing . 56 6.1.2 Character Module Spacing 56 6.1.3 Interchangeability of LED Modules 57 6.1.4 Character Replacement . 57 6.2 LED Ligh

23、t System 57 6.2.1 General 57 6.2.2 LED Selection 57 6.2.3 LED Use 57 NEMA TS 4-2016 Page iii 2016 National Electrical Manufacturers Association DMS Controller Cabinet . 58 Section 77.1 General . 58 7.2 DMS Controller Cabinet Design . 58 7.2.1 Layout 58 7.2.2 Protection. 58 Electronics and Electrical

24、 . 59 Section 88.1 General . 59 8.2 Components . 59 8.2.1 General 59 8.2.2 Wiring, Cabling, and Harnesses 59 8.2.3 Circuit Loading, Surge Protection and Disconnects 59 8.2.4 Printed Circuit Boards 59 8.3 DMS Controller 59 8.3.1 General 59 8.3.2 Communication Interfaces . 59 8.3.3 Communications 60 8

25、.3.4 Internal Clock . 60 8.3.5 Watchdog Timer 60 8.3.6 Loss of Power 60 8.3.7 Communications Link Monitor . 60 8.3.8 Manual Test Interface 60 8.3.9 Controller Reset . 60 8.4 Controller Functions . 61 8.4.1 General 61 8.4.2 Control Architectures . 61 8.4.3 Common Functionality . 61 8.4.4 Centralized

26、Messaging Architecture 62 8.4.5 Local Messaging Architecture . 62 8.4.6 Display Writing . 62 8.4.7 NTCIP Protocol and Command Sets . 62 8.4.8 Other Protocols and Command Sets . 62 8.5 Local Control 63 Performance Monitoring . 64 Section 99.1 Display Diagnostics and Monitoring . 64 9.1.1 LED Pixel Te

27、sts . 64 9.1.2 LED Temperature Monitor . 64 9.1.3 Brightness Controls . 64 9.2 Controller Diagnostics and Monitoring . 65 9.2.1 Watchdog Timer 65 9.2.2 Results of Controller Failures 65 9.2.3 Power Line Failures . 65 9.2.4 Communication Link Failures 65 9.2.5 Subsystem Component Communications . 66

28、9.3 Error and Failure Log 66 9.4 Message Verification . 66 9.5 Defective Character Module . 66 Power Requirements . 67 Section 1010.1 AC or DC Electrical Service 67 NEMA TS 4-2016 Page iv 2016 National Electrical Manufacturers Association 10.2 Power Panels for AC Only 67 10.2.1 Minimum Requirements

29、. 67 10.2.2 Service Drop Advisory . 67 10.3 Distribution Panels for DC 67 10.4 Ground to Neutral Isolation 67 10.5 Surge Protection Device . 67 10.6 Convenience Outlets AC Only 67 10.6.1 Calculated Electrical Load . 68 10.7 Reserve Power Source 68 10.8 DMS Operation . 68 10.8.1 Content/Message 68 10

30、.8.2 Message Brightness 68 10.8.3 Definition of Critical vs. Non-Critical Loads . 68 10.9 Reserve Power Source Sizing Considerations . 68 10.9.1 UPS/Battery . 68 Conformance 70 Section 1111.1 General . 70 11.1.1 Involved Parties . 70 11.1.2 Other 70 11.2 Conformance Document Types . 70 11.2.1 Certif

31、icates . 70 11.2.2 Conformance Testing 70 11.2.3 Statement 70 11.2.4 Inspections 71 11.2.5 Evaluation 71 11.3 Requirements . 71 11.3.1 Mandatory 71 11.3.2 Optional . 71 11.4 Conformance Documentation Requirements . 71 11.5 Conformance Table . 72 Documentation . 78 Section 1212.1 Drawing Documentatio

32、n . 78 12.1.1 System Diagrams 78 12.1.2 Wiring Diagrams 78 12.1.3 Mechanical Drawings 78 12.2 Site Specific Documentation 78 12.2.1 Conformance Table Checklist . 78 12.2.2 NTCIP MIB File 78 12.2.3 As-Built Documentation . 79 12.2.4 Configuration Information 79 12.2.5 Revision Numbers . 79 12.2.6 Tes

33、t Results . 79 12.2.7 Product Burn-In . 79 12.3 Manuals 79 12.3.1 Electronic Copy . 79 12.3.2 Hardcopy . 79 12.3.3 Service . 79 NEMA TS 4-2016 Page v 2016 National Electrical Manufacturers Association 12.3.4 Troubleshooting . 80 12.3.5 Operators Manual . 80 12.4 Warranty Documentation 80 FIGURES Fig

34、ure 2-1 Test Profile . 22 Figure 5-1 Example Comparison15 versus 30 Degree Cone of Vision (Vertical Plane) (top figure) 42 Figure 5-2 Example Overall Cone of Vision Comparison 15 versus 30 Degree Angle (Horizontal Plane) (bottom figure) . 42 Figure 5-3 Graphical Representation of Character Height, C

35、haracter Width, and Stroke Width . 47 Figure 5-4 ExampleStandard Font Containing 5 x 7 Pixels 47 Figure 5-5 ExampleStandard Font Containing 5 7 Pixels 48 Figure 5-6 Geometric Configuration of Test Equipment for Determination of Luminance and Contrast for All Technologies and Chromaticity of Light Em

36、itting Technologies . 53 Figure 5-7 Layout Examples for a Test Module and the Positioning of the Measuring Area (Circle) . 54 TABLES Table 2-1 Compliance of Major Units 17 Table 2-2 Operating Voltages . 17 Table 2-3 Wet-Bulb, Dry-Bulb Relative Humidity at Barometric Pressure of 29.92 In. of Mercury

37、. 19 Table 2-4 Test Functions 21 Table 2-5 Effect of Power Interruption 27 Table 5-1 Minimum Contrast Ratio Requirements, Yellow . 41 Table 5-2 Minimum Contrast Ratio Requirements, White 41 Table 5-3 Minimum Contrast Ratio Requirements, Green 41 Table 5-4 Minimum Contrast Ratio Requirements, Red . 4

38、1 Table 5-5 Minimum Contrast Ratio Requirements, Blue 41 Table 5-6 Luminance Intensity Limits in CD/M2for On-Axis (0 Horizontal, 0 Vertical) Test Anglesfor Yellow 44 Table 5-7 Luminance Intensity Limits in CD/M2for On-Axis (0 Horizontal, 0 Vertical) Test Anglesfor White 44 Table 5-8 Luminance Intens

39、ity Limits in CD/M2for On-Axis (0 Horizontal, 0 Vertical) Test Anglesfor White/Yellow 44 Table 5-9 Luminance Intensity Limits in CD/M2for On-Axis (0 Horizontal, 0 Vertical) Test Anglesfor Green . 44 Table 5-10 Luminance Intensity Limits in CD/M2for On-Axis (0 Horizontal, 0 Vertical) Test Anglesfor R

40、ed 45 Table 5-11 Luminance Intensity Limits in CD/M2for On-Axis (0 Horizontal, 0 Vertical) Test Anglesfor Orange . 45 NEMA TS 4-2016 Page vi 2016 National Electrical Manufacturers Association Table 5-12 Luminance Intensity Limits in CD/M2for On-Axis (0 Horizontal, 0 Vertical) Test Anglesfor Blue 45

41、Table 5-13 Chromaticity Limits for Light-Emitting DMS Technology 46 Table 5-14 NEMA TS 4 Font RatiosnullWidth/Stroke/Spacing . 50 Table 5-15 MUTCD Font RatiosWidth/Stroke/Spacing . 51 NEMA TS 4-2016 Page vii 2016 National Electrical Manufacturers Association FOREWORD This NEMA Standards Publication,

42、 TS 4-2016, Hardware Standards for Dynamic Message Signs (DMS), with NTCIP Requirements, was developed to standardize minimum performance requirements and specifications for design and implementation of dynamic traffic messaging equipment that can be safely installed and provided to the end user wit

43、h operational features based on current technology. Within NEMA TS 4-2016, any reference 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 consti

44、tute a preference. NEMA TS 4-2016 is intended to reduce hazards to persons and property when traffic-messaging equipment is properly selected and installed in conformance with the requirements herein. A future version of NEMA TS 4-2016 may address alternative non-grid power sources. The users attent

45、ion is called to the possibility that compliance with NEMA TS 4-2016 may require use of an invention covered by patent rights. By publication of NEMA TS 4-2016, no position is taken with respect to the validity of any claims or of any patent rights in connection therewith. In the preparation of NEMA

46、 TS 4-2016, input of users and other interested parties has been sought and evaluated. Inquiries, comments, and proposed or recommended revisions should be submitted to the concerned NEMA product subdivision by contacting the: Senior Technical Director, Operations National Electrical Manufacturers A

47、ssociation 1300 North 17thStreet, Suite 900 Rosslyn, Virginia 22209 The Dynamic Message Sign Technical Committee developed NEMA TS 4-2016 under the auspices of the NEMA Transportation Management Systems and Associated Control Devices Section (3TS), of which it is a part. At the time that NEMA TS 4-2

48、016 was prepared, the following NEMA members and their representatives were active voting members of the NEMA 3TS Dynamic Message Sign Technical Committee (3TS DMS TC): Adaptive Micro Systems, Inc. Daktronics, Inc. (Co-Chairs) Parsons SES America Skyline Products, Inc. Ver-Mac, Inc. www.ver- 3T

49、S section approval of NEMA TS 4-2016 does not necessarily imply that all Section members voted for its approval or participated in its development. When NEMA TS 4-2016 was approved, the Transportation Management Systems and Associated Control Devices Section was composed of the following members: Adaptive Micro Systems, Inc. Applied Information, Inc. Daktronics, Inc. www.daktronics