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NEMA TS 2 Traffic Signal Cabinet Troubleshooting

NEMA TS 2 Traffic Signal Cabinet Troubleshooting. Course Outline. Module 1: Introduction and Course Objectives Module 2: History of NEMA Standard Module 3: NEMA Cabinet Platforms Module 4 : NEMA TS 2 Standard – An Overview

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NEMA TS 2 Traffic Signal Cabinet Troubleshooting

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  1. NEMA TS 2 Traffic Signal Cabinet Troubleshooting

  2. Course Outline Module 1:Introduction and Course Objectives Module 2:History of NEMA Standard Module 3: NEMA Cabinet Platforms Module 4: NEMA TS 2 Standard – An Overview Module 5:Definitions and Environmental Requirements (Sections 1 and 2) Module 6:Controller Units (Section 3) Module 7:Malfunction Management Unit (Section 4) Module 8: Terminals and Facilities (Section 5)

  3. Course Outline Module 9: Auxiliary Devices (Section 6) Module 10: Cabinets (Section 7) Module 11: Bus Interface Unit (Section 8) Module 12: Surge Protection Module 13: Cabinet Troubleshooting Procedures Module 14: Summary and Questions Module 15: Hands-On

  4. Module 1:introductions and course objectives

  5. Course Learning Objectives • To develop an understanding of the NEMA TS 2 Standards • To develop an understanding of each of the components of a NEMA TS 2 Cabinet Assembly and their respective functionality • To be able to identify the platform of cabinet whether it be NEMA TS 1, NEMA TS 2 Type 1, or NEMA TS 2 Type 2 • To develop an understanding of the process of cabinet troubleshooting

  6. Module 2:History of NEMA Standard

  7. Technology has come a long way!

  8. 1975 2009 N E M A Pre-Standards TS-1 1976 TS-2 1992 Caltrans / NYDOT 1979 170 179 1985 170E 1990 2070 1995 ATC 1999 - Developing Courtesy of Vanasse Hangen Brustlin, Inc. (VHB)

  9. NEMA TS 1 Controller Platform • NEMA TS 1 Adopted in 1976 and reaffirmed in 1989 • Goal of the standard was to provide interchangeability among manufacturers • Functional standard • Included all equipment in the cabinet

  10. NEMA TS-1 Controller PlatformDisadvantages • Standard did not allow for expandability beyond the three connectors defined • MSD (fourth connector) is manufacturer specific and thus prevented interchangeability for enhanced controller functions such as coordination and preemption • Did not cover pretimed operation • Capabilities beyond traffic control not available • System communications not interchangeable

  11. NEMA TS 1 Controller PlatformAdvantages • Defined effective basic actuated intersection control • Allowed for interchangeability among manufacturers for basic functions by defining the A, B, and C Connectors • By not specifying hardware, controller capabilities expanded with technology

  12. NEMA TS-1 Controller Platform With Enhanced Features

  13. NEMA TS-2 Controller Platform • Developed in 1992 and formally approved by NEMA to overcome the limitations of TS 1 • Standard defined two types of controllers • TS2 Type 1 – utilizes high speed serial bus • TS2 Type 2 – retains MS connectors allowing for downward compatibility • Included pretimed control operation and cabinet standards • NEMA TS -2 Reaffirmed in October,1998 and again in May, 2003 to include NTCIP requirements

  14. NEMA TS 2 Objectives • Define equipment requirements based on valid engineering concepts • Allow for Interchangeability without precluding downward compatibility of TS 1 equipment • Develop enhanced diagnostics • Minimize potential malfunctions • Provide for future expandability • Allow for enhanced user interface • Define advanced traffic signal operations such as coordination and preemption • Advanced cabinet monitoring and diagnostics

  15. NEMA TS 2 Standard - Proposals • Standardize the present “D” connector • Free up seldom used pins on MSA, MSB, and MSC connectors and reassign them for enhanced functions • Proceed with an entirely new standard • Proceed with proposal 1 then move to proposal 3 for the long term solution

  16. Results of the NEMA TS 2 Standard Development Process • Decision made to go with Proposal 3, provide for two types of cabinet platforms: • TS2 Type 1 – utilizes high speed serial bus • TS2 Type 2 – retains MS connectors allowing for downward compatibility • Let the end user decide on what platform best meets their short and long term requirements

  17. Module 3:NEMA Cabinet Platforms

  18. DETECTORS CMU A D B C 171 WIRES TERMINAL FACILITIES 81 WIRES TS1 CABINET CONFIGURATION

  19. MMU POWER SUPPLY DETECTOR RACK SDLC 15 WIRES PA P2 P1 P3 ENET A B C 81 WIRES 171 WIRES TERMINAL FACILITIES SDLC 15 WIRES BIU BIU BIU 15 WIRES 15 WIRES TS2 CABINET CONFIGURATION 15 WIRES

  20. Two Types of NEMA TS 2 Controllers PA P2 • TS 2 Type 1 • “Pure” TS 2 Controller • Small MS A connector for Power and Fault Monitor • Communication to cabinet devices via Port 1 SDLC bus • TS 2 Type 2 • Downward compatible to TS 1 • MS A, B, and C connectors plus Port 1 SDLC for communication to MMU PA P1 P2 P3 ENET P1 P3 ENET A B C

  21. MMU POWER SUPPLY DETECTOR RACK PA P2 P1 SDLC P3 ENET 15 WIRES Port 1 SDLC Interface Panel 81 WIRES TERMINAL FACILITIES BIU BIU BIU SDLC 15 WIRES “PURE” TS2 TYPE 1 CABINET CONFIGURATION

  22. “Pure” TS 2 Type 1 Cabinet Configuration • Communication between cabinet equipment accomplished via Synchronous Data Link Control (SDLC) Bus eliminating MS A, B, and C connectors – “SDLC is highway for cabinet communications” • Communication to Terminal Facilities (TF) and Detector Rack via SDLC bus through Bus Interface Units (BIUs) • Malfunction Management Unit (MMU) communicates to controller through SDLC bus and retains discrete point-to-point wiring to TF • Eliminates most point-to-point wiring connections making for less points of failure

  23. MMU POWER SUPPLY DETECTOR RACK PA P2 P1 SDLC P3 ENET 15 WIRES A B C Port 1 SDLC Interface Panel 81 WIRES TERMINAL FACILITIES 171 WIRES BIU HYBRID TS2 TYPE 2 CABINET CONFIGURATION

  24. TS 2 Type 2 Cabinet Configuration • Minimum requirement that the controller and MMU be connected via the Port 1 SDLC bus • Controller has both Port 1 connector to interface with SDLC bus and MS A, B, and C connectors to interface with TF • Type 2 allows for downward compatibility with TS-1 cabinets

  25. Time for a Quiz!

  26. NEMA TS 2 Cabinet Assemblies TS2 Type 1 or TS 2 Type 2 ?

  27. NEMA TS 2 Cabinet Assemblies TS2 Type 1 or TS 2 Type 2 ?

  28. NEMA TS 2 Cabinet Assemblies TS2 Type 1 or TS 2 Type 2 ?

  29. NEMA TS 2 Cabinet Assemblies TS2 Type 1 or TS 2 Type 2 ?

  30. Module 4:NEMA TS 2 Standard – an overview

  31. Benefits of NEMA TS 2 Standard • Enhanced standardization • Enhanced safety & reduced liability • Upgrade path for expansion & innovation • Greater opportunity for multiple sourcing

  32. NEMA TS 2 StandardEnhanced Standardization • TS2 specifies controllers and cabinets more fully than TS1 • Defines advanced functionality such as coordination, preemption, and time base control • Defines detector programming to allow for individual detector channels

  33. NEMA TS 2 StandardEnhanced Standardization • Specifies all connections inside traffic cabinet • Eliminates manufacturer-specific “D” connector • Specifies cabinet dimensions • Type 2 allows for downward compatibility with TS-1 cabinets

  34. NEMA TS 2 StandardEnhanced Safety and Reduced Liability • Simplified cabinet wiring • Redundant MMU functionality • Program verification (Controller and MMU) • Provision for output monitoring • Clearance time monitoring • AC power monitoring • Detector status and failure monitoring • Cabinet-level diagnostics • Enhanced controller logging

  35. NEMA TS 2 StandardEnhanced Safety and Reduced Liability • Simplified Cabinet Wiring • 15 wire SDLC bus replaces 171 wire A, B, and C cables • Redundant MMU Functionality • A TS2 controller can put the intersection into flash if the MMU fails • Program Verification • Controller and MMU verify each others program every 100msec

  36. NEMA TS 2 StandardEnhanced Safety and Reduced Liability • Output Monitoring • The MMU can compare the load switch output to the controller output • Clearance Time Monitoring • The MMU times the interval between conflicting greens and yellow clearance time • AC Power Monitoring • The MMU monitors incoming power for low voltage and brownout conditions

  37. NEMA TS 2 StandardEnhanced Safety and Reduced Liability • Enhanced Controller Logging • Detector Report • Events Report • MMU Report

  38. Upgrade Path for Expansion and Innovation Open architecture at cabinet level • Made possible by SDLC bus • Interface to as yet unspecified cabinet devices Open architecture at system level • Made possible by standardized telemetry port and NTCIP Communications Protocol “Technology platform” for future ITS applications

  39. NEMA TS 2 Standard - Overview • Section 1 – Definitions • Section 2 – Environmental Requirements • Section 3 - Controller Units • Section 4 - Malfunction Management Unit (MMU) • Section 5 - Terminals and Facilities • Section 6 - Auxiliary Devices • Section 7 - Cabinets • Section 8 - Bus Interface Unit (BIU)/Synchronous Data Link Cables (SDLC)

  40. NEMA TS 2 Cabinet Assembly

  41. Module 5:Definitions and environmental requirements (Sections 1 and 2)

  42. Section 1 - Definitions • Includes definition of new devices and functions defined by TS-2 • BIU – Bus Interface Unit • CU – Controller Unit • DR – Detector Rack • MMU – Malfunction Management Unit • TF – Terminals and Facilities • AD-Auxiliary devices • Coordination • Preemption • Time Base Control • Detection

  43. Section 2 – Environmental Requirements • Establishes limits for environmental and operating conditions in which a device will perform. • Defines a series of minimum test procedures to ensure device conformance to the standard. • Endurance tests • Shock tests • Electrical tests

  44. Section 2 – Environmental Requirements • Environmental and Operating Standards • Operating Voltage – 120 VAC • Operating Frequency – 60 Hz +_ 3Hz • Temperature – -34C (-30F) to +74C(+165F) • Humidity – 95 %

  45. Module 6:Controller units(Section 3)

  46. Controller Units • Physical Standards • Interface Standards • Functionality • Modes • Unit Types • NTCIP

  47. Controller Unit Physical Standards - Configurations PA P2 PA P1 P2 P3 ENET P1 P3 ENET A B C TS 2 Type 1 Source : NEMA TS2 - 2003 Standards Publication Section 3.2 TS 2 Type 2

  48. Controller Unit Physical Standards - Configurations • Maximum height = 12” • Maximum width = 19” (allowed for rack mounting) • Maximum depth = 14.5” * * - This dimension includes connectors, harnesses and protrusions.

  49. Controller Unit Interface Standards – Type A1 and P1 • Input/Output (I/O) for CU to MMU/DR/TF/AD is defined under section 3.3.1 • Section 3.3.1 defines the high speed, full duplex communications protocol which links all of the control cabinet assemblies devices.

  50. Controller Unit Interface Standards – Type A2 and P2 • I/O for CU to MMU/DR is defined under section 3.3.1. • I/O for CU to TF/AD and any shelf mounted detectors is defined under section 3.3.5.

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