Type AT Signal - Alstom

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Theory of Operation 2.4. LED UNIT FUNCTIONAL DESCRIPTION The LED Unit P/N 20179-0XX-00 is available in 4 colors: • Green LED 20179-008-00 • Red LED 20179-009-00 • Yellow LED 20179-010-00 • Lunar White LED 20179-011-00 This is a single, self-contained device that does not require any field assembly. The lamp is wired via ring terminals to AAR terminal posts within the signal unit. Each unit contains an LED board and a power supply board contained in the signal housing. These housings are replaceable as a unit and are not serviceable. The LED unit power boards operate from 90 to 130 VAC (60 Hz. P2502, Rev. Apr/08 2–4 Alstom Signaling Inc.
Theory of Operation 2.4.1. LED Lamp Wiring Figure 2–3 is a wiring diagram of a typical three aspect LED Unit P/N 20179-0XX-00 LED signal configured, green, yellow, and red. The signal wiring shown in dotted lines represents field wiring of multi-conductor number 14 AWG cable. Signal number is represented by xxx in this example. See Appendix A for additional example wiring diagrams. G 1 2 Y 1 2 R 1 2 xxxRG xxxHG ACX xxxDG Figure 2-3. Typical Type AT 3 Aspect LED Signal Wiring Diagram P2502, Rev. Apr/08 2–5 Alstom Signaling Inc.
Page 1: Type AT Signal Copyright © 2008 Al
Page 5 and 6: LIST OF EFFECTIVE PAGES P2502, Type
Page 7 and 8: PREFACE NOTICE OF CONFIDENTIAL INFO
Page 9 and 10: ABOUT THE MANUAL This manual is int
Page 11 and 12: MANUAL SPECIAL NOTATIONS In the Als
Page 13 and 14: Topic TABLE OF CONTENTS Page 1. SEC
Page 15 and 16: Description LIST OF FIGURES Page Fi
Page 17 and 18: Description LIST OF TABLES Page Tab
Page 19 and 20: Introduction 1. SECTION 1 - INTRODU
Page 21 and 22: Introduction 1.3. PHYSICAL CHARACTE
Page 23 and 24: ` Introduction Table 1-1. Type AT S
Page 25 and 26: Introduction 1.5. LED LIGHT SOURCE
Page 27 and 28: Theory of Operation 2. SECTION 2- T
Page 29: Theory of Operation 2.3.1. Type AT
Page 33 and 34: Theory of Operation Figure 2-5 is a
Page 35 and 36: Installation 3. SECTION 3 - INSTALL
Page 37 and 38: Installation Figure 3-2. Typical Ce
Page 39 and 40: Preventive Maintenance 4. SECTION 4
Page 41 and 42: Preventive Maintenance 4.2.1. Inspe
Page 43 and 44: Preventive Maintenance Table 4-3. E
Page 45 and 46: Preventive Maintenance 4.2.4. Signa
Page 47 and 48: Troubleshooting 5. SECTION 5 - TROU
Page 49 and 50: Troubleshooting SIGNAL ASPECT DIM O
Page 51 and 52: Corrective Maintenance 6. SECTION 6
Page 53 and 54: ` Corrective Maintenance 6.3. LENS
Page 55 and 56: Corrective Maintenance 6.5. LAMP RE
Page 57 and 58: Corrective Maintenance Table 6-6. A
Page 59 and 60: Corrective Maintenance 6.8. SIGNAL
Page 61 and 62: Corrective Maintenance 6.9. WAYSIDE
Page 63 and 64: Corrective Maintenance 7. SECTION 7
Page 65 and 66: 7.3. LENSES Corrective Maintenance
Page 67 and 68: Corrective Maintenance 7.4. SINGLE
Page 69 and 70: Corrective Maintenance THIS PAGE IN
Page 71 and 72: Corrective Maintenance Table 7-3. E
Page 73 and 74: Corrective Maintenance 7.6. 3 ASPEC
Page 75 and 76: Corrective Maintenance Table 7-4. E
Page 77 and 78: Parts Catalog Table 7-5. Example 3
Page 79 and 80: 7.8. LED UNITS Parts Catalog Figure
Page 81 and 82:
Parts Catalog 7.9. 2 ASPECT TYPE AT
Page 83 and 84:
Parts Catalog Table 7-7. Example 2
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Page 87 and 88:
Parts Catalog 7.10. 7 ASPECT TYPE A
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Page 91 and 92:
Parts Catalog Table 7-8. Example7 A
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Parts Catalog 7.11. 3 ASPECT TYPE A
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Parts Catalog THIS PAGE INTENTIONAL
Page 97 and 98:
Drawings G Y R ILLUMINATED NO. PLAT
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Drawings A.3. TYPE AT SIGNAL UNIT W
Page 101 and 102:
Drawings G 1 2 Y 1 2 R 1 2 20 1 2 x
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Drawings THIS PAGE INTENTIONALLY LE
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