An American-Standard Company

SERVICE MANUAL 6082

OVERSPEED SYSTEM AND

MAGNETIC AXLE GENERATOR

January, 19 79 A-79-100-2287-1

* * * * OPERATION AND

MAINTENANCE INSTRUCTIONS

UNION SWITCH & SIGNAL DIVISION WESTINGHOUSE AIR BRAKE COMPANY

Swissvale, PA 15218

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Section

CONTENTS

I INTRODUCTION

1.1 GENERAL INFORMATION 1.2 AXLE GENERATOR 1.3 SHAPER-LIMITER PRINTED CIRCUIT BOARD 1.4 SPEED GOVERNOR PRINTED CIRCUIT BOARD

II DESCRIPTION OF OPERATION

2.1 SHAPER LIMITER P/N N451404-6801 2.2 SPEED GOVERNOR P/N N451404-7602

III MAINTENANGE

3.1 AXLE GENERATOR MAINTENA.J.~CE AND TEST 3. 2 SHAPER-LI.MITER/V=O PCB TEST 3.3 SPEED GOVERNOR PCB TEST

IV PARTS LIST

Figure 1.

Figure 2.

Figure 3.

Figure 4.

Figure 5.

Figure 6.

Figure 7.

Figure 8.

Figure 9.

4. 1 SHAPER LIMITER PCB 4.2 SPEED GOVERNOR.PCB

L!ST OF ILLUSTRATIONS

System Application Circuits

Shaper~Limiter Block Diagram (Speed Signal/V=O)

Speed Governor Block Diagram

Axle Generator Assembly

Shaper Limiter Waveforms

Standard Circuit Diagrams of Printed Circuit Boards

Speed Governor Waveforms

Standard Circuit Diagram of Plug-!n Circuit

Shaper Limiter/V=O PCB

Figure 10. Speed Governor PCB

ii

Page

1/2

1/2 1/2

5 5

5

5 8

8

8 13 17

21

21 25

3/4

7

9/10

11/12

14

15/16

18

19/20

23

27

..

SECTION I

INTRODUCTION

1.1 GEHERAL INFORMATION

WABCO ~

The SS-3 Overspeed Protection subsystem is designed to provide visual and audible warning to the locomotive operator when an overspeed condition occurs, and to automatically apply braking if the operator fails to correct the overspeed condition within a specified period of time. Overspeed detection is accomplished by electronically measuring the actual speed of the locomotive by means of an axle generator and then comparing the measured speed to the allowable speed information received from the rail signals. When an overspeed condition exists, visual and audible alarms are activated and unless the operator initiates corrective action within a specified period of time, braking circuits are automatically activated to bring the locomotive to a stop.

The SS-3 Overspeed Protection subsystem consists of an axle generator and printed circuit boards mounted in a common card file. The description and function of each of these items are as follows:

(Refer to Figure 1)

1.2 AXLE GENERATOR

The axle generator is a electro-mechanical device which is directly coupled to the axle of the locomotive, and consists of a magnetic impulse generator enclosed in a rugged cast iron housing. The electrical connections from the generator are routed through a connector of special design mounted to the housing and through the attached rubber tubing which provides maximum protection against moisture and abrasion.

The steel gear of the magnetic impulse generator is coupled to the locomotive axle, and rotates in the magnetic field of a stationary coil wound on a permanent magnet. An alternating current potential is produced in the coil when the gear rotates and the frequency generated is proportional to the speed of the locomotive.

6082, p. 1/2

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Figllre 1. System Application Circuits

6082, p. 3/4

1.3 SHAPER-LIMITER PRINTED CIRCUIT BOARDS

This board receives a speed signal from the axle generator to produce three outputs:

a) An output pulse with its frequency proportional to locomotive speed.

b) A vital output signal to indicate when the locomotive is not moving.

c) A simulated tachometer signal.

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Tnis board also produces an audio frequency signal and -20 VDC.

1.4 SPEED GOVERNOR PRINTED CIRCUIT BOARD

The Speed Governor accepts logic inputs from the Relay Matrix corresponding to the allowable locomotive speeds and the input pulses from the Shaper-Limiter which are frequency proportional to the locomotive speed. The Speed Governor then compares these two inputs (allowable and measured speeds) and if the measured speed exceeds the allowable speed, the energizing signal to the overspeed relay is removed causing the relay to indicate that an overspeed condition exists by activating the visual and audible alarms. The operator must respond within a specified period of time or automatic braking action will result.

The Speed Governor characteristics are modified by the wheel wear switch, which compensates for speed signal errors due to wheel wear. Speed 'input for Speed Governor requirements is produced by, and received from the shaper-limiter printed circuit board.

SECTION II

DESCRIPTION OF OPERATION

2.1 SHAPER-LIMITER (N451404-6801) (See Figures 2 and 6)

The Shaper-Limiter (Speed Signal/V = 0) board has three principal functions. It provides a vital output if the locomotive is not moving, it shapes the tachometer signal produced by the axle generator into a narrow pulse and it provides a series of pulses in order to simulate the axle generator input while the locomotive is stopped. In this manner the overspeed circuitry, particularly the speed governor is kept active while the locomotive is stopped and

6082, p. 5

prevents a brake application. Circuit design assures that these pulses will not appear while the locomotive is moving in excess of approximately 5 MPH. The Speed Signal/V = 0 board also includes a 115 KHz amplifier and a rectifier to provide the negative DC power requirements for the Speed Governor board.

The magnetic pick-up in the axle generator is shunted by a tuning capacitor and connected to the input of a high gain amplifier. The output of this amplifier is coupled back to its input through a dual input gate. When the gate is enabled the positive feed back produced will cause the amplifier to oscillate at a frequency determined by the resonant circuit of the magnetic pick-up and its shunting capacitor.

When the gate allows the amplifier to oscillate, the output is rectified by a detector, passed through a time constant and then to a switch that effects control by means of a change in its output potential level. This output is connected to the dual input gate which is disabled when the potential level from the switch changes to a lower value as a result of the amplifier going into oscillation. There is no feed back when the gate is disabled and the amplifier will stop oscillating resulting in no output to the detector, time constant or switch. The loss of input causes the switch to change and present a high potential level to the gate which then allows feed back and the amplifier will oscillate.

Thus the gate and loop will switch on and off at a low repetitive rate determined by the time constant and a high frequency will intermittently appear across the pick-up. The on and off switching pulses are passed to a 50/50 duty cycle circuit and then to an output pin that provides an AC signal present only when the locomotive velocity is approximately zero. The on and off switching pulses are also amplified and rectified by a second amplifier and are used to blank the speedometer which would otherwise register the V = 0 pulses as locomotive speed when the locomotive is not moving. Additional pulses are generated in the pick-up coil when the gear in the axle generator starts to rotate and these pulses are passed to the first amplifier and the detector. When the frequency of these pulses exceed the time constant that controls the switch, a steady potential is presented to the switch which in turn closes the gate causing the high frequency oscillations to cease, and the pulses pass through the second amplifier to the speedometer driver circuit.

A decrease in locomotive speed reduces gear rotation in the axle generator and thus the frequency of the generated pulses also decrease. When the pulse rate becomes inadequate to hold the electronic switch in the "gate off" state, the high frequency oscillations will appear and the loop and gate will switch on and off at the low repetitive rate. In order to obtain a good transition from the V = 0 condition, a small amount of hysteresis is introduced to cause a snap action in the transition zone.

6082, p. 6

(j'\

0 co N

'u . .......

MAGNETIC PICK UP

013

Q3&Q4

GATE

TO CIRCUIT

(-) DC MAKER

115KHZ FROM SPEED GOV.

DETECTOR

Q5

TIME CONSTANT

C4

INHIBIT LINE

QS,09,10&11

50/50

PROCESSOR

SWITCH

Q6&Q7

FROM . SPEED

GOV. BOARD

SPEEDOMETER DRIVE&

I INHIBITOR ITO

~-~----------'-SPEEDOMETER

I ... SPEED SIGNAL TO SPEED GOV. BOARD

Figure 2.

(-) DC MAKER

Q13&Q14

·20VDCTO SPEED GOV.

Shaper-Limiter Block Diagram (Speed Signal/V=O)

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2.2 SPEED GOVERNOR (N451404-7601 & 7602) (Refer to Figures 3 and 8) --.,.

The function of the Speed Governor printed circuit board is to monitor and limit the speed of the train by providing a visual and audible warning to the operator followed by automatic brake application in the event that the operator fails to acknowledge a reduced speed cab signal or make a brake application when an overspeed condition exists.

The speed governor receives two inputs from the shaper-limiter/ V = 0 board. One is a squarewave speed signal and the other is a negative DC voltage (-20 VDC) which is routed through the relay logic before it reaches the speed governor.

The speed signal enters an amplifier (1) that has its gain set to produce an output of a given level, then the signal is routed through a low pass filter network causing the amplitude to become inversely proportional to its frequency. The filter output connects to a second amplifier (2) which drives the primary of the speed selection transformer (Tl). One of the several taps on the primary is selected depending on the cab signal speed selection. The tap selected determines the primary to secondary voltage ratio and it receives the -20 DC volts from the shaper-limiter board. A step-up tap is used for high speed selection. The output of Tl is amplified (by amp 3) and rectified to produce a negative DC voltage that is applied to the level detector.

When the DC voltage reaches a specific value it makes the oscillator in the level detector operate and this signal is amplified by an amplifier (4) that drives two relays. One relay is the warning relay that drops immediately when an overspeed condition exists. The other is the overspeed relay and it has a delayed drop away, usually 2 seconds.

The frequency of the speed signal is proportional to the speed of the train, however the amplitude is set by the vital low voltage power supply that has its output determined by the wheel wear adjustment. The speedometer is also dependent on the vital power supply.

SECTION III

MAINTENANCE

3.1 MAGNETIC AXLE GENERATOR MAINTENANCE AND TEST (Refer to Figure 4)

If problems are encountered with the Magnetic Axle Generator, a defective magnetic pick-up should be suspected. To check the pick-up, disconnect the Axle Generator cable and test for the following:

6082, p. 8

Cl)

0 co [\.) .. "d

"° '-.... ..... 0

R4& C1

LOW PASS

FILTER

01&02

SPEED SIGNAL

T1

SPEED

SELECTION

TRANS.

013, 011

VITAL LOW VOLTAGE POWER SUPPLY

WHEEL WEAR ADJUST

03&04

SPEED -20 VDC FROM SELECT SHAPER-LIMITER

05

LEVEL

DETECT.

osc

Figure 3. Speed Governor Block Diagram

TO SPEEDOMETER

DRIVE

115 KHz TO SHAPER­

LIMITER

06, 7, 8, 9, & 10

RELAY DRIVE

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Figure 4. Axle Generator Assembly

60 82, p. 11/12

a) A DC coil resistance of 150 to 200 ohms.

b) A DC resistance to ground (axle generator housing of .5 megohms or more from either cable lead.

c) A coil inductance of from 60 to 85 millihenrys.

WARNING

IF THE MAGNETIC PICK-UP IS REPLACED OR REMOVED FOR ANY REASON AIR GAP BETWEEN THE PICK-UP FACE AND THE TOOTHED t'VHEEL MUST BE SHIMMED FROM .003" to .004". WHEN REINSTALLING THE MAGNETIC PICK-UP, BE SURE TO APPLY LOCKTITE GRADE "A" (UA041608) TO THE THREADS OF THE ATTACH-

MENT SCREWS (SEE ITEM 20, FIGURE 6). CLEAN ANY DIRT, GREASE, OR FOREIGN MATERIAL FROM THE SCREW THREADS BEFORE APPLYING LOCKTITE.

After removing or replacing the magnetic pick-up, it is imperative that the air gap between the pick-up and toothed wheel be set at .003" to .004" (see Figure 4). In order to check the gap (using a feeler gauge) it is nec~ssary to remove the generator face plate and to turn the locomotive wheel until a toothed wheel of the Axle Generator is aligned with the center of the pick-up.

3.2 SHAPER-LIMITER/V=O PCB TEST

The waveforms in Figure 5 are provided as an aid in performing periodic testing and also for locating trouble when the circuit board is suspected of being defective. A card extender board (part number N398028) should be used to allow access to test points on the P. c. Boards.

The magnetic pick-up must be connected when making the wave­form measurements otherwise no waveforms will appear.

Connect the ground lead of the oscilloscope to the ground side of the circuit board and place the probe on the circuit board at the test points designated on the circuit diagram in Figure 6. The displayed waveform should compare to that shown in Figure 5 for the particular point being tested. If the displayed waveform does not agree, then the circuit components in that particular stage should be checked for failure or a change in value.

6082, p. 13

6082, p. 14

SHAPER LIMITER/V=O

0 C3(-) 2V/Div.

50µs/Div.

© Pin 14 2V/Div.

lOrns/biv.

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0 Pin 5 5V/Div. lOrns/Div.

0 Pin 8 5V/Div. Sµs/Div.

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Figure 5. Shaper Limiter Waveforms

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Figure 6. Standard Circuit Diagrams of Printed Circuit Boards

6082, p. 15/16

3. 3 SPEED GOVERNOR PCB TEST

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The waveforms in Figure 7 are provided as an aid in performing periodic testing and also for locating trouble when the circuit board is suspected of being defective.

Connect the oscilloscope in the same manner as described in paragraph 3.2 and use the test points shown in the circuit diagram of Figure 8. Compare waveforms as explained in Paragraph 3.2.

6082, p. 17

6082, p. 13

SPEED GOVERNOR

0 0 C4(+) Dll&R38 2V/Div. SV/Div. lOms/Div. 2µs/Div.

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0 0 Ll&Cll C6(+} lV/Div. 2V/Div. 20µs/Div. lOms/Div.

© Pin 18-V 2V/Div. lOms/Div.

Figure 7. Speed Governor Waveforms

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Figure 8. Standard Circuit :oiagram of Plug-ln Circuit

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6082 I P• 19/20

SECTION IV PARTS LIST (REFER TO FIGURE 9)

WABCO ~

PRINTED CIRCUIT BOARD PART NO.N451404-6801, -6802

4.1 SHAPER LIMITER PCB

ITEH

Cl,C8,Cl2 C2,Cl0 C3,C9 C4 cs C6 C7,Cl3 Cl4,15,17

Dl,D2 D3,4,7,8,9,

DlO D5,6 Dll,Dl2

Ql,2,3.6,7, Ql0,11

Q4,5,8,9, Ql2,13

Ql4 Ql5 Ql6,17

Rl,2 R3 R4,6,20,29,

R37 RS R7,ll R8,9,43 Rl0,14,36 Rl2 Rl3 RlS Rl6,22,38 R39,41 Rl7 Rl8 Rl9,R21 R23 R24 R25 R27 ,2 8

DESCRIPTION

Capacitor, .01 MFD, 10%, 50V Capacitor, .1 .MFD, 10% 50V Capacitor, 4.7 MFD, 10%, 35V Capacitor, .47 MFD, 10%, lOOV Capacitor, . 0022 l1FD, 10%, lOOV Capacitor, .47 MFD, 5%, 200V Capacitor, 47 MFD, 10%, 35V See Suffix Tabulation

Diode, Zener 1N753A, 5%, 6.2V,\W

Diode, 1N914A, PIV, lOOV Diode, Zener 1N962B, 5%, llV Diode, 1N4003, 1 Amp., 200V, PIV

Transistor, 2N5962-18, Silicon i'JPN

Transistor, 2N3964, Silicon PNP Transistor, 2N2270, Silicon NPN Transistor, 2N4037, Silicon PNP See Suffix Tabulation

Resistor, 470 Ohms, 5%, \W Resistor, 18K Ohms, 5%, \W

Resistor, 47K Ohms, 5%, \W Resistor, 1 Meg Ohms, 5!!c 0, \W Resistor, lOK Ohms, S!!c 0' \W Resistor, lK Ohms, S!!c 0' \W Resistor, lOOK Ohms, 5%, \W Resistor, 82K Ohms, 5%, \W Resistor, SIOK Ohms, S!!c 0' \W Resistor, 2. 2 Meg Ohms, 5%, \W

Resistor, 2K Ohms, 5%' \W Resistor, 56K Ohms, 5%, \W Resistor, 330K Ohms, 5!!c o I \W Resistor, lSK Ohms, S!!c o I \W Resistor, 220 Ohms, S!!c o I \W Resistor, 1. 2K Ohms, S!!c o I \W Resistor, 6.2K Ohms, S!!c o I \W Resistor, 20K Ohms, 5!!c o I \W

WABCO Part#

J706439 J706436 J706422 J706145-0028 J709144-0038 J709055 J706419

J723914

J726031 J726150-0070 J723555

J731398-0040

J731398-0050 J731186 J731291

J735141 J735069

J735035 J735300 J735053 J735031 J735137 J735519-0087 J735405 J735215

J735048 J735044 J735479 J735061 J735071 J735042 J735514 J735054

6082 t P• 21

WABCD ~

PARTS LIST (Cont'd).

ITEH DESCRIPTION WABCO Part #

R30 Resistor, 3.9K Ohms, 5%, ~w J735066 R31 Resistor, 3.0K Ohms, 5%, ~w J735052 R32 Resistor, 220K Ohms, 5g. o, ~w J735406 R33 Resistor, 200K Ohms, 5g. 0, \W J735519-0227 R34 Resistor, TBD TBD R35 Resistor, 270K Ohms, 5%, ~w J735243 R36 Resistor, 2.3K Ohns, 5g. 0' ~w J735046 R40 Resistor, 510 Ohms, 5%, \W J735159 R42,43 Resistor, lK Ohms, 5g. 0, \W J720882 R45,46 See Suffix Tabulation

6082, p. 22

+ ~ .... =--[ -]-----~;;;;;;;;;;;;;;;~) l

c J + C15 C14

R39 C J C J C ::J R35 R37

r -, ( ~ 013

012 Fl n Oil R46 -./ 017

ClO J L. _J /

CJ-~ R42 \._ ~ nR41 r l 09 014 U

R40 C 8 Fl n .- --. Fl L Ju u L_ _J u o1

C12

II[] 08 --....

I +C ~ • ·~ 012 C9 Rl 3 • •

C7 c .J+ c: nR29 R31 011 U

C :J C J R32

06

R34

R30

CID

c J c J

c J R33 R27 :)010

n [JJ R25 C J R26[ ] C6 L.J R18

o5 c m

r, R45 R44 r J ur) ~ c ]

R43 ¢- ( 07 r) --- 016 _/ ...

y x 015 R15 c J - c J I. J R16

06 c J R14

I 1 [ =:] C5

n C4 Rll c J u I I c :J ,...-._.

~p RIO

n nR12 05 R4 U

u r1 ("" 03 .)

R7 02 n n R5 -\. J

c2 L J n ..... '-' l R2

c=)"h:)' ):·~ URS ~ ( J

--------....... c ] - ) C JR3

•

C17 U OS C fr 09 04 R20 n R23 1:1

U R21 C ]----, -R9 n ~04 Rl

u n R22 CJ I

n '- J

01 n nR19 U R17

• LIU I][ J

JI DJ

J n n R38 Fl 010 _J f:t Q

R36 U t-t

C13

v I

--, L

u ae,.......;;'-';;;,. lU L.J ~ Cl e

' I I A

' UN451404 68 J COMPONENT SIOE

VUTSRPkl.4[KJHffO(BA

Figure 9. Shaper Limiter/V=O PCB

WABCD ~

6082, p. 23

WABCCI ~

PARTS LIST Cont'd.

Suffix Item

6801 Cl4

6801 Cl5

6801 Cl7

6801 R45, R.46

6801 Ql6,Ql7

6801 X-Y

6801 Key

6802 Cl4,Cl5

6802 Cl7

6802 R45,R46

6802 Ql6

6802 Ql7

! I 6802 X-Y

6802 I Key

I I

i

6082, p. 24

SUFFIX TABULATION

PCB No. N451404-6801 PCB No. N451404-6802

Description

Capacitor, 4.7 MFD.

Capacitor, 10 MFD.

Capacitor, 2200 PFD, 500V

----

With Jumper

Index (5&6) (13&14)

Capacitor, 440 MFD, 40V

Capacitor, 1800 PFD, 500V

Resistor, 15 Ohms, 0.5 Watt

Transistor, 2Nl906

Transistor, 2N4037, PNP, SLON

Without Jumper

Index (2&3) (17&18)

Part No.

J706422

J706625

J702803

----

----

J709072

J702817

J735148

J731186

J731291

----

WABCD ~

PARTS LIST (Refer to Figure 10) Printed Circuit Board Part No. 451404-7601, 7602, 7603

4. 2 SPEED GOVERNOR PCB

ITEl'l

Cl C2 C3,6,7 C4 cs ca C9 ClO Cll Cl2 Cl3,15,18 Cl4 Cl6 Cl7 Cl9 C22

Dl, 2 03,12,13 04,5,15,16 17,18,19

D6,7,8,9,10 Dll 014 020,21,22,

23,24 Rl,15,16, 25,32,46

R2,3,10,ll 12,13,14, 51,52

R4 RS R6 R7,28 R8,37,44 R9 Rl7,19,49 Rl8 R20 R21,22 R23,27 R24 R26,53 R29

DESCRIPTION

Capacitor, See Suffix Tabulation Capacitor, 1 MFD, 10%, 35V Capacitor, 47 MFD, 10%, 35V Capacitor, 33 MFD, 10%, 35V Capacitor, See Suffix Tabulation Capacitor, . 022 MFD, 10%, lOOV Capacitor, .082 MFD, 5%, 200V Capacitor, .068 l--1FD, 10%, 50V Capacitor, .0068 .MFD, 5%, 200V Capacitor, .0022 MFD, 2%, lOOV Capacitor, 10 .MFD, 10%, 35V Capacitor, 1.8 MFD, 10%, 35V Capacitor, 27 MFD, 10%, 20V Capacitor, .047 MFD, 10%, SOV Capacitor, .1 MFD, 10%, SOV Capacitor, See Suffix Tabulation

Diode, 1N4003 Diode, LVA4 62A

Diode, 1N914A Diode, BR5C5 Diode, UJ5248B Diode, 1N758B

See Suffix Tabulation

Resistor, lOK ohm, 5%, l/4W

Resistor, l/4W TBD See Suffix Tabulation Potentiometer, 2K Ohm, 20%, l/2W Resistor, 510 Ohm, 5%, l/4W Resistor, 47K Ohm, 5%, l/4W Resistor, lOOK Ohm, 5%, l/4W Resistor, 4.7K Ohm, 5%, l/4W Resistor, lK Ohm, 5%, l/4W Resistor, 33 Ohm, 5%, l/4W Resistor, 9.lK Ohm, 5%, l/4W Resistor, 82K Ohm, 5%, l/4W Resistor, 3K Ohm, 5%, l/4W Resistor, 100 Ohm, 5%, l/4W Resistor, 1 Meg. Oh:1:1, 5%, 1/ 4W Resistor, 510 Ohm, 5%, 2W

WABCO Part#

J706387 J706419 J706159

J706844 J709145-0163 J706573 J706995 J709145-0048 J706625 J706687 J706678 J706574 J706436

J723555 J726150-0079

J726031 J726150-0087 J726150-0083 J726150-0028

J735053

TBD

J620850-0028 J735159 J735035 J735137 J735034 J735031 J735519-0057 J735064 J735519-0287 J735052 J735050 J735300 J721169

6082, p. 25

WABCD ~

PARTS LIST Cont'd.

ITEil DESCRIPTION WABCO Part #

R30 Resistor, 10 Ohm, 5%, lW J721157 R31, 45 Resistor, 22K Ohm, 5%, l/4W J735093 R33 Resistor, 47 Ohm, 5%, l/4W J735248 R34,35,40 Resistor, 10 Ohm, 5%, l/4N J735057 R38 Resistor, 750 Ohm, 5%, l/4W J735056 R39 Resistor, 44 Ohm, 5%, 3w- J735519-0291 R41 Resistor, 330 Ohm, 5%, l/4W J721358 R42 Resistor, 2K Ohm, 2%, l/2W J721080 R43 Resistor, 20K Ohm, SS!-0, l/4W J735054 R47,50 Resistor, 120K Ohm, 5%, l/2W J735303 R48 Resistor, 5.llK Ohm, 1%, l/8W J735091 Tl Transformer, See Suffix

Tabulation.

6082, p. 26

010 R31 C14 C:ll C]] C:J L~+ D9,-

C13 r- R29l__ _J 07L- + =+ c =:J

([: ::J [£::J R30 C]] 08 08 06 ~J 06

l~ r-\01 , , \ 09 r .,{26........, ......_.. C:J C :J (I ::J 04 R53

I lc1s C:J I (' R33

)

~ _;010 018 , + nR32 R45

+1 LI n Fl n nR46 R41n n LI LI u

- --:-:,__+ LI ~ J D19LJC22

CllL ~ 05 CC:J

R23 C:J C12c ~

C15 c8=J c C; ...._ __ ! : 015 014

n L =:Jcg ~1:J nR21 LI CC:J C:J LI R20

0_r.- 1 R21

+L __Jc1 " ~ --, R250 I ICIO

+-c._ __Jes U R18 C]] -.. 05 C:J 02 04 LJ (l::J Ole )03 ( 1 CRj:

R19 C:J .._/ C:J ..... :c =1: Rl~ ~ csc: :r C5r----, C:J

+ L R16. ,... B.K. C4j ___J - -

··--·· +

R51 016 C:J

R50 C:J

1Rnn CI .J LI ~ LIR43 R52 R44

(_C-19_) R42 n r- ---. LJ L__ _J

017 016

D14n 1 Fl R41 ~ LI LJ 015

R39 (" L2 )013

( \ c?_ o.~r-1on

BU. c21 I lc20

Tl l J v ---.,___

n C:J , ) LJR9 RB R5 ~ 013

cJ , n.A 02' l ~ I ~ 11LJLJ nR37 c ) 1 or- ls«. s: _ OR. v -r ) 1 ,.. u

cn2 I + I n nc::>~~n~n ~n~'--- l +, ,Jco12n

L, r.1 l u u -u ..... u ""'LI ~u swi + ...., ~ n l+I+ + II J R2 n nn~ o1,uu I lc11 LI u CljL e IIIILJ... \.._)

R7

RI n n n n n n - ,,.._ 011 -. 01 LI~ bl ~ ~ ~ R35

01}-' .... ,,

~Rsnunu ORJ r x ~' 020 021 022 023 024

R4 V V I I I I

-, L

VUTSRPNMLKJ HF EOCBA

A

'

-

UN451404 76 j COMPONENT SIDE

Figure 10. Speed Governor PCB

:6082, p. 27

WABCD ~

PARTS LIST Cont'd. SUFFIX TABULATION

PCB No. N451404-7601 for wheel diameter of 1050 mm PCB No. N451404-7602 for wheel diameter of 914 mm PCB No. N451404-7603

Suffix Item Description

7601 Cl Capacitor .1 MFD 10%, 200V 7601 cs Capacitor .0047 MFD, 2%, lOOV 7601 C22 Capacitor .03 MFD 7601 D20,21,22,

23, 24 (Jumper Wire Used) 7601 R4 Resistor, 40.2K, 1%, l/8W 7601 Tl Transformer 7602 Cl Capacitor . 1 MFD, 10%, 200V 7602 cs Capacitor .0047 MFC, 2%, lOOV 7602 C22 Capacitor .03 MFD 7602 D20,21,22,

23,24 (Jumper Wire Used) 7602 R4 Resistor, 40.2K, 1%, l/8W 7602 Tl Transformer 7603 Cl Capacitor, . 022 MFD 7603 cs (Jumper from A to A & B to B) 7603 C22 Capacitor, .0068 MFD 7603 D20,21,22,

23,24 Diode, 1N914A 7603 R4 Resistor, 15K 7603 Tl Transformer

6082, p. 28

Part Number ! I

J709145-0211 J709145-0257 J709145-0019

--J735322 N451039-1012 J709145-0211 J709145-0257 J709145-0019

--J735322 N451039-1013 J706789

--J709138-0001

J726031 J735077 N451039-1014

WABCCJ

An American-Standard Company

UNION SWITCH &SIGNAL DIVISION WESTINGHOUSE AIR BRAKE COMPANY

Swissvale, PA 15218

•