Tactical Controls DTM User manual

Distance Trip Meter
(DTM)
London Underground Limited
Contract No. MCL0008
Instruction Manual
2.0 21-Mar-03 Major update - add acc/dec test DCDC
1.2 12-Oct-98 Change speed test display DCDC
1.1 9-Jul-98 Display test 5s to 2s DCDC
1.0 11-Mar-98 First release DCDC
Rev. Date Description ByBy
Copyright (C) 1998-2003 Tactical Controls Limited
This document contains proprietary information which is protected by copyright. All rights reserved. This document or parts thereof may not
be reproduced in any form without written permission of the publishers.
The information in this document is subject to change without notice and should not be construed as a commitment by Tactical Controls
Limited. Tactical Controls Limited shall not be liable for errors contained herein or for incidental or consequential damages in connection
with the furnishing, performance or use of this material.

Tactical Controls Limited Distance Trip Meter
Instruction Manual
Contents
Introduction ................................................................
...........................
3
Block diagram ................................................................
.......................
3
Description ................................................................
............................
3
Distance measurement ................................................................
...........
4
Operator interface ................................................................
..................
4
Display distance ................................................................
.....................
5
Speed test................................................................
...............................
5
Acceleration/deceleration test ................................
...............................
6
Data retention ................................................................
........................
6
Power supply ................................................................
.........................
6
Installation ................................................................
.............................
6
System layout diagram ................................................................
..........
8
System connection diagram ................................................................
...
9
System wiring list ................................................................
..................
9
Technical Specification ................................................................
.......
10
Ordering information ................................................................
...........
11
Supplier information ................................................................
............
11
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Tactical Controls Limited Distance Trip Meter
Instruction Manual
Introduction
This instruction manual describes a microprocessor-based Distance Trip Meter (DTM) with
application to London Underground Limited; C Stock, Hammersmith and Circle Line, LUL
contract No: MCL0008.
The DTM is designed to interface with the Electronic Speedometer (ESU) and stores the
distance travelled, up to three distances are to be stored.
Block diagram
All Rights Reserved.
C
Filename:
A4
Size:
Drawing No.:
Title:
Tactical Controls Limited
Rev. Description Iss. Chk. Auth. Date
FIRST ISSUE
ALL DIMENSIONS ARE IN MM. GENERAL TOLERANCE X = +/-0.5 X.X = +/-0.05 BLOCK
1
BLOCK DIAGRAM
INPUT
BUFFER MICROCONTROLLER
POWER SUPPLY
DISPLAY
BLOCK DIAGRAM FOR DISTANCE TRIP METER
DTM\SPEC\BLOCK
2-JUN-1997
7-DIGIT 7-SEGMENT LED
-50V
DC
PUSH BUTTON AND
KEY SWITCH INPUT
NON-VOLATILE
MEMORY
SPEED
PULSE
INPUT
Description
At the heart of the system is the microprocessor which reads the Distance Pulse input signal
from the Electronic Speed Unit (ESU), this signal is transient protected, buffered hardware
and software filtered before it is connected to the microprocessor input.
The single row of 7-digits 7-segment Light Emitting Diode (LED) display is controlled by the
microprocessor using dedicated display integrated circuits.
The supply to the microprocessor is derived from the -50Vdc supply via a step-down switch
mode power supply. It is surge and transient protected.
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Tactical Controls Limited Distance Trip Meter
Instruction Manual
The DTM is supplied with Litton 5-way, shell size 16S, bayonet connector; the receptacle is
fitted with pins. The free plug is fitted with 2 meters of 3 core screened cable, terminated with
four M5 rings and cable markers.
Warning: This cable is going to be terminated with a 10 way connector Part no.
ABCIRH08FC18-1PCNP3. The pin allocation is going to be: A - C1D (-50V), B - CR1
(0V), C - DV6 (dist buff) and D - screen. The System layout diagram, System connection
diagram and System wiring list will be modified accordingly.
Please see Layout diagram for detail.
Distance measurement
The microprocessor works out the Distance by means of continuously measuring the timing
between each cycle of the Distance signals, from which it could calculate the distance
travelled.
Unfiltered square pulse signals from the Electronic Speed Unit (ESU) are fed to the input of
the DTM, these pulses undergo hardware and software filters inside the DTM and the clean
signals are then fed to the microprocessor input.
The Distance Pulse Signal
The distance pulse signal is generated by the ESU which has a buffered output.
The signal amplitude from the ESU is -15Vdc and floating with respect to ground (0V); The
output is floating when there is no signal.
For detail, please see Interface Board drawing, drawing number 91701.
The DTM can also be connected directly to an unbuffered ESU signal.
The frequency/speed ratio is 17.74Hz/MPH.
It must be borne in mind that the Distance Pulse signal connections between the ESU and the
DTM unit are not isolated; both units voltages referred to the system Ground (0V).
It is also important to note the Distance Pulse output signal from the ESU must be within +/-
1.0Vdc of the specified amplitudes - otherwise the DTM might not response to it.
The maximum train's speed is set at 70MPH.
Operator interface
The operator interface consists of:
1. A single row of 7-digit 7-segment LED display.
2. Three push-buttons.
3. A key-switch.
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Tactical Controls Limited Distance Trip Meter
Instruction Manual
The display
The 7-digits 7-segment LED display is used to display three distance parameters, these are: A,
B and C. These distance parameters are displayed in KM (Kilometres) with leading zeros. The
display is normally OFF and would display a value when any of the three push-buttons is
depressed.
Display test
When any one of the three push buttons is pressed, the display will show all "8" for 2 seconds
before reverting to its normal display.
Key-switch
A single key-type is used for all cars to reset the distance parameters. The key is spring biased
in the insert position. In the event that the key has been accidentally left in the insert-position
while the car is in operation, the unit continues to operate normally.
Display distance
When any one of the three push buttons is pressed, the display will show all "8" for 2 seconds
and then display the distance stored corresponding to the push button pressed which can be A,
B or C. The display will continue to show the distance until the push button is released, then
the display will go blank.
Reset distance procedure
To reset a distance parameter to zero, for example, the A distance parameter:
1. Press and hold the A button to display the A distance parameter.
2. Switch and hold the reset-key to Reset position (non-removable).
3. Observes that the display would count down from 10.
4. When count down reaches zero, release and remove key.
5. Observes that the display reset to all zero.
6. Release the A button, the display should go blank.
Speed test
To display the current speed in mph (miles per hour), press any two of the three push buttons
simultaneously. The display will show "HhhSPss" where "H" is the symbol for Highest speed,
"hh" is the highest speed attained, "SP" are the symbols for SPeed and "ss" is the current
speed. The speed has a range from 0 to 70 mph.
Reset Highest speed procedure
To reset the highest speed attained parameter to zero:
1. Press and hold any two push buttons.
2. Switch and hold the reset-key to Reset position (non-removable).
3. Observes that the display would count down from 10.
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Tactical Controls Limited Distance Trip Meter
Instruction Manual
4. When count down reaches zero, release and remove key.
5. Observes that the Highest speed attained shows current speed or zero, whichever
is higher.
6. Release the buttons, the display should go blank.
Acceleration/deceleration test
To display the average acceleration or deceleration in m/s/s (meters per second per second),
press all three push buttons simultaneously. The display will show "dDDxxAA" where "d" is
the symbol for maximum Deceleration, "DD" is the maximum deceleration attained so far
during the test, "xx" could be "Ac" or "dE" depends on whether the train is in acceleration or
deceleration on average so far during the test, "AA" is the average acceleration or
deceleration. The acceleration or deceleration has a range from 0.0 m/s/s to 6 m/s/s.
To cancel the acceleration test, press all three push buttons again simultaneously. Any other
combinations of push buttons pressed are ignored when the DTM is in acceleration test mode.
There is also a time out period of 2 minutes, after which the acceleration test mode is
cancelled and the display goes blank.
Please note that unlike the 3 distance parameters and the highest speed, the maximum
deceleration attained during the test is not recorded. The acceleration/deceleration test always
starts with the maximum deceleration set to zero.
Please also note that the average acceleration/deceleration shown are calculated by subtracting
the initial speed at the start of the test from the current speed and divided the result by the time
elapsed from the start of the test. Hence the changes of the average acceleration/deceleration
will become less and less as the test progresses.
Data retention
The DTM stores the 3 distance parameters and the highest speed attained in non-volatile
memory. In the event of power failure, these data are protected and recalled from the non-
volatile memory when the power is returned.
The DTM is designed to ensure that the data retention capability of the unit has good RFI
immunity. The use of a single-chip microcontroller with special built-in EEPROM offer high
reliability for parameter storage. Also the unit's metal enclosure is designed to provide good
RFI shield.
Power supply
The DTM is powered by the Train's control supply which is nominally -50Vdc with the
positive pole earthed. The design can accommodate a ripple of up to 5V peak to peak, at a
nominal frequency of 850Hz and associated harmonics. DTM's supply input is designed to
withstand the RIA12 Surge and Transient tests.
Installation
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Tactical Controls Limited Distance Trip Meter
Instruction Manual
The DTM is supplied with one angle bracket for fixing. Please see System layout diagram for
details.
A screened 3-core cable of 2M length, terminated with M5 rings and cable marker, provides
all the external connections. Please see System connection diagram and System wiring list for
details.
Warning: This cable is going to be terminated with a 10 way connector Part no.
ABCIRH08FC18-1PCNP3. The pin allocation is going to be: A - C1D (-50V), B - CR1
(0V), C - DV6 (dist buff) and D - screen. The System layout diagram, System connection
diagram and System wiring list will be modified accordingly.
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Tactical Controls Limited Distance Trip Meter
Instruction Manual
System layout diagram
Tactical Controls Limited
A2
DISTANCE TRIP METER - LAYOUT DIAGRAM
Filename:
Size:
Drawing No.: Title:
Rev. Description Iss. Chk. Auth. Date LAYOUT © All Rights Reserved.
2M 3 CORE SCREENED CABLE
EARTH
1234
0V
DIST -50V
DISTANCE
PULSES DC
SUPPLY
(TERMINAL RAIL NOT SUPPLIED)
125.0
ALL DIMENSIONS ARE IN MM. GENERAL TOLERANCE X = +/-0.5 X.X = +/-0.05
CBA
M6 Earth stud
Litton socket
5-way pins
Key-switch
200.0 195.0
90.0
66.012.0
28.0
3
127.012.0
19.0
1 2
311.0
8.0
6.5
18.0
NOTES: 1. BRACKET 2 SUPPLIED LOOSE
2. MATERIAL: SHEET STEEL 16SWG EXCEPT BRACKET 1, 2 & 3 3MM THICK
3. FINISH: ZINC PLATED
47.0
30.0 35.0 135.0
13.0
DTM\DWG\LAYOUT
9-FEB-19981.0 PRODUCTION ISSUE
B1C1 A1SCREEN
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Tactical Controls Limited Distance Trip Meter
Instruction Manual
System connection diagram
2M 3 CORE SCREENED CABLE
EARTH
1234
0V
DIST -50V
DISTANCE
PULSES DC
SUPPLY
(TERMINAL RAIL NOT SUPPLIED)
B1C1 A1SCREEN
System wiring list
Cable Marker
Description
A1 '-52V supply
B1 0V earth
C1 Distance pulse signal
Screen Earth
Warning: This cable is going to be terminated with a 10 way connector Part no.
ABCIRH08FC18-1PCNP3. The pin allocation is going to be: A - C1D (-50V), B - CR1
(0V), C - DV6 (dist buff) and D - screen. The System layout diagram, System connection
diagram and System wiring list will be modified accordingly.
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Tactical Controls Limited Distance Trip Meter
Instruction Manual
Technical Specification
Supply
Voltage -32 to -63 Vdc; -50 Vdc nominal.
Ripple Unaffected by 5 volt peak to peak.
Input protection Reverse polarity protection. Surges and transients to BRB/RIA 12.
Current consumption 100mAdc maximum at -50Vdc (when display on)
20mAdc at -50Vdc (when display off)
Sensor
Pulse input Signal amplitude is between -8.5V & -12.5V peak to peak with respect
to earth with frequency/speed ratio of 17.74Hz/MPH.
Indicators
7-digit display Green 7-segment LED display, 7.6mm height.
Distance in KM; speed in MPH.
Operator interface
Key switch 100mA, 25Vdc rating minimum; electrical life over 10,000 operations;
1 pole, contacts normally open; key in non-removable position with
switch contacts closed; spring biased in insert position; panel
mounted; IP65 rating.
Push buttons 100mA, 25Vdc rating minimum; electrical life over 10,000 operations;
contacts normally open; IP65 rating.
Electrical interface
Connector Litton bayonet connector, 3-way, shell size 16S; complete with 2
meters of 3 core screened cable; cable terminates with M5 ring.
Environment
Operating temperature -15°C to +55°C.
Storage temperature -30° to +85°C.
Relative humidity 0 to 90%.
IP rating IP65
Mechanical
Dimensions To LUL sketch TPIE/SRD/ODO/03; see layout diagram for detail.
Housing Material: aluminium, zinc plated, natural.
Standards
RSE/STD/031/PART 1: ISSUE B General requirements for electronic equipment
BRB/LUL/RIA No.13: 1990 General specification for electronic equipment
BRB/LUL/RIA NO.12:1984 Surge and Transients testings
BRB/LUL/RIA NO.18:1990 Interference testings
BRB/LUL/RIA NO.20:1988 Vibration and shock testings.
Warranty 12 months return to base.
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Tactical Controls Limited Distance Trip Meter
Instruction Manual
Ordering information
Ordering code: DTM
You are welcome to order the unit by code or by description - DTM Distance Trip Meter.
Supplier information
Tactical Controls Limited
Unit 4 Parkland Business Centre
Chartwell Road
Lancing, West Sussex BN15 8TR
England
Tel: [phone]
Fax: [phone]
Email: [email protected]
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