Siemens ST750 User manual

ST750GENERAL HANDBOOK
667/HB/33750/000 Page 1 Issue 6
Intelligent Traffic Systems
Sopers Lane, Poole, Dorset, BH17 7ER
United Kingdom
[phone]
www.siemens.co.uk/traffic
S
ST T7 75 50 0
G
Ge en ne er ra al l H Ha an nd db bo oo ok k
PREPARED: Andy White
FUNCTION: Engineering Manager
THIS DOCUMENT IS ELECTRONICALLY HELD AND APPROVED
© Siemens Mobility Limited. 2018 All rights reserved.
The information contained herein is the property of Siemens Mobility Limited and is
supplied without liability for errors or omissions. No part may be reproduced or used except
as authorised by contract or other written permission. The copyright and the foregoing
restriction on reproduction and use extend to all media in which the information may be
embodied.
The names of products of third parties named in this document may be trademarks of their
respective owners.

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667/HB/33750/000 Page 2 Issue 6
Change History
Issue
Change Ref
Date
1
First Issue
11 February 2009
2
TS004961
27 February 2009
3
TS005209
28 August 2009
4
TS005637
31 August 2010
5
TS005954
10 February 2011
6
TS009064
06 December 2018

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667/HB/33750/000 Page 3 Issue 6
SAFETY INFORMATION
HEALTH AND SAFETY AT WORK
DISCONNECT ALL POWER TO THE CABINET BEFORE REMOVING OR
INSTALLING ANY EQUIPMENT INTO THE CABINET.
Safety of Maintenance Personnel
In the interests of health and safety, when using or servicing this equipment the
following instructions must be noted and adhered to:
(i) Only skilled or instructed personnel with relevant technical knowledge and
experience, who are also familiar with the safety procedures required when
dealing with modern electrical/electronic equipment are to be allowed to use
and/or work on the equipment. All work shall be performed in accordance with
the Electricity at Work Regulations 1989.
(ii) Such personnel must take heed of all relevant notes, cautions and warnings
in this Handbook and any other Document or Handbook associated with the
equipment including, but not restricted to, the following:
(a) The equipment must be correctly connected to the specified incoming
power supply.
(b) The equipment must be disconnected/isolated from the incoming
power supply before removing any protective covers or working on any
part from which the protective covers have been removed.
(c) This equipment contains a Lithium battery that must be disposed of in
a safe manner. If in doubt as to the correct procedure refer to the
instructions contained on page 6 of this document.
(d) Any power tools must be regularly inspected and tested.
(e) Any ladders used must be inspected before use to ensure they are
sound and not damaged.
(f) When using a ladder, before climbing it, ensure that it is erected
properly and is not liable to collapse or move. If using a ladder near a
carriageway ensure that the area is properly coned and signed.
(g) Any personnel working on site must wear the appropriate protective
clothing, e.g. reflective vests, etc.
In the event of more than one person working on the Controller and its associated
signal heads, the Mains Supply to the Cabinet Assembly must be switched off. If the

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667/HB/33750/000 Page 4 Issue 6
master switch has a lock, this should be used to keep the switch locked in the ‘off’
position.
Warning
When working on the controller in countries where both sides of the
incoming supply are above earth potential, the Master Switch or Circuit
Breaker on the rear of the Cabinet should be opened, since the
Controller Switch on the front of the ST750 does not isolate both sides
of the supply.
When re-commissioning signals, the following sequence is recommended:
1. Switch OFF the Cabinet Assembly at the master switch
2. Switch ON the lamps on-off switch on the manual panel
3. Switch ON the Cabinet Assembly at the master switch.
More specific safety information is given within the text of the handbook, where it
relates to particular activities or situations.

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667/HB/33750/000 Page 5 Issue 6
WARNING
To isolate the equipment the master switch must be in the
“Off” position.
Switching either the Controller or the Manual Panel Signals
On/Off switch to “Off” does not guarantee isolation of the
equipment.
WARNING
These (this) controller(s) require specific configuration to
enable them (it) to function correctly when installed.
The configuration process is a complex activity should
only be carried out by persons who are adequately trained,
have a full understanding of the needs of the county or
region where the controller is to be used and are
experienced in the tasks to be undertaken.

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667/HB/33750/000 Page 6 Issue 6
Safety of Road Users
It is important that all personnel are aware of the dangers to road users that could
arise during repair and maintenance of traffic control equipment.
Ensure that the crossing area is coned and signed as necessary to warn motorists
and pedestrians of any dangers and to help protect the personnel working on the
site.
Whilst repairing signals which are in an "all-out" condition, care must be taken to
ensure that no spurious signals are lit during testing which could mislead drivers or
pedestrians. Particular care is required where pedestrian audible devices are
installed, to ensure that no false indications are given during, for example, cable
testing. Personnel should also ensure the safety of pedestrians, especially children,
who may come into contact with parts of the ST750 Rack Assembly, Cabinet
Assembly or signal poles.
Safety Warning - Lithium Battery
This equipment contains a Lithium battery.
Do not short circuit, recharge, puncture, take apart, incinerate, crush, immerse, force
discharge or expose to temperatures above the declared operating temperature
range of the product, otherwise there is a risk of fire or explosion.
Batteries should be handled and stored carefully to avoid short circuits. Do not store
in disorderly fashion, or allow metal objects to be mixed with stored batteries. Keep
batteries between -30°C and 35°C for prolonged storage.
The batteries are sealed units which are not hazardous when used according to
these recommendations. Do not breathe vapours or touch any internal material with
bare hands.
Battery disposal method should be in accordance with local, state and government
regulations. In many countries, batteries should not be disposed of into ordinary
household waste. They must be recycled properly to protect the environment and to
cut down on the waste of precious resources.

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TABLE OF CONTENTS
1. INTRODUCTION.......................................................................................................................... 11
1.1 PURPOSE OF THIS HANDBOOK..............................................................................................11
1.2 CONTACT US............................................................................................................................11
1.3 REFERENCE DOCUMENTS......................................................................................................11
1.3.1 NON-ESSENTIAL DOCUMENTS –INTERSECTION DESIGN............................................ 11
1.3.2 ESSENTIAL DOCUMENTS –CONTROLLER.....................................................................11
1.3.3 ESSENTIAL DOCUMENTS –CABLING..............................................................................12
1.3.4 ESSENTIAL DOCUMENTS –ANCILLARY EQUIPMENT....................................................12
1.4 PRE-REQUISITES.....................................................................................................................12
1.4.1 QUALIFICATIONS ..............................................................................................................12
1.4.2 REQUIRED TOOLS ............................................................................................................13
1.5 DEFINITIONS ............................................................................................................................13
1.6 ABBREVIATIONS ......................................................................................................................14
2. SPECIFICATION.......................................................................................................................... 16
2.1 EQUIPMENT INTRODUCTION..................................................................................................16
2.1.1 SINGLE PEDESTRIAN CONTROLLER............................................................................... 17
2.1.2 DUAL PEDESTRIAN CONTROLLER..................................................................................17
2.1.3 SMALL NON-UK CONTROLLER......................................................................................... 17
2.1.4 CONTROLLER EXPANSION ..............................................................................................17
2.1.5 TYPES OF PEDESTRIAN CONTROLLER..........................................................................18
2.1.6 DIFFERENCES BETWEEN THE ST750 AND THE ST700..................................................18
2.1.7 SPARES COMPATIBILITY BETWEEN THE ST750 AND ST700 ........................................ 20
2.2 BASIC SYSTEM OVERVIEW.....................................................................................................20
2.3 MAINS SUPPLY.........................................................................................................................21
2.3.1 ELECTRICAL NOISE ..........................................................................................................22
2.4 DETERMINATION OF LOADING AND POWER CONSUMPTION.............................................22
2.4.1 ST750 SUPPLY REQUIREMENTS .....................................................................................23
2.4.2 LAMP DRIVE CAPABILITY................................................................................................. 23
2.4.3 CALCULATION OF AVERAGE SIGNAL LAMP POWER.....................................................25
2.4.4 INTERSECTION’S POWER REQUIREMENTS FOR RUNNING COSTS ESTIMATE..........25
2.4.5 CONNECTION TO UN-METERED SUPPLIES (UMS).........................................................26
2.4.6 DETECTOR POWER SUPPLIES........................................................................................ 27
2.4.7 AUDIBLE AND TACTILE SUPPLIES...................................................................................27
2.5 PHASES.....................................................................................................................................28
2.6 STAGES ....................................................................................................................................28
2.7 TIMINGS....................................................................................................................................28
2.7.1 TOLERANCE ......................................................................................................................29
2.8 MASTER TIME CLOCK AND CLF SUMMARY...........................................................................29
2.9 MODES OF OPERATION.......................................................................................................... 30
2.10 CABINET CHARACTERISTICS................................................................................................ 31
2.11 ENVIRONMENTAL...................................................................................................................31
2.11.1 TEMPERATURE ...............................................................................................................31
2.11.2 ATMOSPHERIC................................................................................................................32
2.11.3 HUMIDITY.........................................................................................................................32
3. PEDESTRIAN FACILITIES.......................................................................................................... 33
3.1 TYPES OF PEDESTRIAN CROSSINGS....................................................................................33
3.1.1 PELICAN CROSSING.........................................................................................................33
3.1.2 NEAR SIDED PEDESTRIAN CROSSING ........................................................................... 33
3.1.3 FAR SIDED PEDESTRIAN CROSSING.............................................................................. 34
3.1.4 ON-CROSSING DETECTORS............................................................................................ 35
3.2 PEDESTRIAN MODES OF OPERATION................................................................................... 36
3.2.1 FIXED VEHICLE PERIOD...................................................................................................36
3.2.2 VEHICLE ACTUATED.........................................................................................................36
3.2.3 VEHICLE ACTUATED WITH PRE-TIMED MAXIMUM (PTM).............................................. 37
3.2.4 LINKED OPERATION ......................................................................................................... 37

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3.3 PEDESTRIAN DEMAND CONTROL..........................................................................................38
3.3.1 INTRODUCTION.................................................................................................................38
3.3.2 PEDESTRIAN DEMAND ACCEPTANCE ............................................................................40
3.3.3 PEDESTRIAN DEMAND DELAY (PDD)..............................................................................40
3.3.4 PEDESTRIAN DEMAND CANCEL (PDX)............................................................................41
3.3.5 KERBSIDE DETECTOR (MAT) TESTING...........................................................................41
4. HARDWARE OVERVIEW ............................................................................................................43
4.1 CABINET OPTIONS...................................................................................................................43
4.2 THE ST750 RACK ASSEMBLY..................................................................................................46
4.3 ST750 CPU LEDS......................................................................................................................48
4.3.1 STATUS LED GROUP ........................................................................................................48
4.3.2 SIGNAL LED GROUP......................................................................................................... 49
4.4 MASTER SWITCH ASSEMBLY ................................................................................................. 49
4.5 FUSES.......................................................................................................................................50
4.6 MAINS DIMMING TRANSFORMER........................................................................................... 50
4.7 MANUAL PANEL........................................................................................................................50
4.8 DETECTOR MOUNTING ...........................................................................................................51
4.8.1 DETECTOR BACK PLANE IN SMALL OUTER CASE.........................................................51
4.8.2 DETECTOR BACK PLANES IN LARGE OUTER CASE......................................................53
4.9 2A DETECTOR SUPPLY KIT.....................................................................................................53
4.10 GEMINI2................................................................................................................................... 54
4.10.1 GEMINI2IN SMALL OUTER CASE ...................................................................................54
4.10.2 GEMINI IN LARGE OUTER CASE....................................................................................55
4.11 TC12 OTU................................................................................................................................57
4.11.1 INTEGRAL TC12 OTU IN SMALL OR LARGE OUTER CASES........................................57
4.11.2 FREE STANDING TC12 OTU IN SMALL OUTER CASE................................................... 57
4.11.3 FREESTANDING TC12 OTU IN A LARGE OUTER CASE................................................ 59
4.12 SDE/SA....................................................................................................................................60
5. INSTALLATION AND COMMISSIONING .................................................................................... 61
5.1 PRE-INSTALLATION CHECKS..................................................................................................61
5.1.1 HARDWARE CHECK..........................................................................................................61
5.1.2 DIMMING TRANSFORMER TAP SETTING........................................................................61
5.2 ST750 CABINET PREPARATION..............................................................................................62
5.3 SITE SUITABILITY.....................................................................................................................62
5.4 INSTALLATION OF THE ST750 SMALL CABINET....................................................................63
5.4.1 INSTALL CONTROLLER CABINET AND STOOL...............................................................64
5.5 INSTALLATION OF THE ST750 LARGE CABINET.................................................................... 65
5.5.1 REMOVE THE CONTROLLER CABINET FROM THE STOOL...........................................66
5.5.2 INSTALL THE STOOL.........................................................................................................66
5.6 CABLING TO THE ST750 SMALL AND LARGE CABINETS......................................................67
5.7 ON SITE CABLE TESTING........................................................................................................ 69
5.8 FIT THE CABINET TO THE STOOL .......................................................................................... 70
5.9 BACK FILL AND IN-FILL THE STOOL .......................................................................................70
5.10 SEALING THE BASE OF THE CONTROLLER OUTER CASE.................................................70
5.11 CABLE ROUTING & TERMINATION........................................................................................71
5.11.1 PHASE DRIVE PCB TERMINAL BLOCKS........................................................................72
5.11.2 ST750 CPU PCB TERMINAL BLOCKS............................................................................. 82
5.12 REGULATORY SIGNS MONITORING..................................................................................... 87
5.13 PCB SWITCHES, FUSES, LINKS AND FIRMWARE................................................................87
5.13.1 CPU PCB SWITCH AND LINK SETUP .............................................................................88
5.13.2 PHASE DRIVE PCB SWITCHES, LINKS AND FUSES SETUP.........................................91
5.14 REFITTING THE LID................................................................................................................93
5.15 ON-SITE ST750 TESTING.......................................................................................................93
5.16 ST750 START-UP SEQUENCE ...............................................................................................95
5.17 COMMON RETURNS FOR PUSH BUTTON............................................................................96
5.18 COMMON RETURNS FOR DETECTORS................................................................................96
6. FITTING THE ST750 RACK ASSEMBLY INTO ALTERNATIVE CABINETS ..............................97

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7. ROUTINE MAINTENANCE PROCEDURES.................................................................................98
7.1 ROUTINE INSPECTION OF SIGNAL EQUIPMENT...................................................................98
7.2 ROUTINE INSPECTION AND ELECTRICAL TESTING OF ST750 ............................................98
7.3 ROUTINE SETUP CHECK....................................................................................................... 100
7.4 REPLACEMENT OF PCBS...................................................................................................... 100
7.4.1 SAFETY REQUIREMENTS............................................................................................... 101
7.4.2 GENERAL REQUIREMENTS............................................................................................ 101
7.4.3 ACCESS TO PCBS IN ST750 CABINET ASSEMBLY....................................................... 101
7.4.4 ACCESS TO PCBS IN OTHER OUTERCASES................................................................ 102
7.4.5 REPLACEMENT OF CPU PCB......................................................................................... 102
7.4.6 REPLACEMENT OF POWER/PHASE ASSEMBLY .......................................................... 102
7.4.7 REPLACEMENT OF MANUAL PANEL PCB ..................................................................... 103
7.4.8 REPLACEMENT OF EXPANSION I/O OR OTU PCB........................................................ 104
7.5 REPLACEMENT OF MAINS POWER SUPPLY UNIT.............................................................. 104
7.6 REPLACING OTHER COMPONENTS..................................................................................... 104
8. SELF-TEST FACILITY .............................................................................................................. 106
APPENDIX A - PART NUMBERS AND SPARES LIST.................................................................. 112
A.1 –PART NUMBERS.................................................................................................................. 112
A.2 –SPARES LIST....................................................................................................................... 113
A.2.1 –PCBS............................................................................................................................. 113
A.2.2 –FUSES........................................................................................................................... 114
A.2.3 –CABLES......................................................................................................................... 114
A.2.4 –OTHER SPARES........................................................................................................... 114
A.3 - FUSE RATINGS AND POSITIONS........................................................................................ 114
Table of Figures
Figure 1 –Theoretical Crossing........................................................................................................ 25
Figure 2 –Ped Demand Processing ................................................................................................ 39
Figure 3 –ST750 in Small Outer Case with Detector Swing Frame ................................................. 43
Figure 4 –ST750 in Small Outer Case configured with optional 11” Swing Frame........................... 44
Figure 5 –ST750 in Large Outer Case configured with optional 19” Swing Frame ........................... 45
Figure 6 –ST750 Rack Assembly.................................................................................................... 46
Figure 7 –CPU and Phase Driver Cards......................................................................................... 47
Figure 8 –I.O Expansion Card ........................................................................................................ 47
Figure 9 - CPU LEDs....................................................................................................................... 48
Figure 10 –Master Switch Assembly............................................................................................... 49
Figure 11 –Mains Dimming Transformer......................................................................................... 50
Figure 12 –Manual Panel (full panel shown)................................................................................... 51
Figure 13 –Single Detector Backplanes.......................................................................................... 51
Figure 14 –Detector Swing Frame.................................................................................................. 52
Figure 15 –Detectors in 11” Swing Frame....................................................................................... 53
Figure 16 –Detectors in a 19” Swing Frame.................................................................................... 53
Figure 17 - 2A Detector Supply Kit .................................................................................................. 54
Figure 18 - Gemini in a Detector Swing Frame................................................................................ 54
Figure 19 - Gemini in an 11" Swing Frame...................................................................................... 55
Figure 20 - Gemini in a Large Outer Case....................................................................................... 56
Figure 21 - Freestanding TC12 OTU in Small Outer Case............................................................... 58
Figure 22 - Free Standing TC12 OTU in Large Outer Case ............................................................. 59
Figure 23 - Dimming Transformer Tap Selection............................................................................. 62
Figure 24 - Stool Installation, Small Cabinet.................................................................................... 65
Figure 25 - Stool Installation, Large Cabinet.................................................................................... 67
Figure 26 - Termination of Armoured CAble to CET bar .................................................................. 69
Figure 27 - Allocation of Red Lamp Monitor Channels for ST750 Controllers without LV CLS (NLM)
monitoring................................................................................................................................ 76

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Figure 28 - Allocation of Red Lamp Monitor Channels for ST750LED Controllers with LV CLS (NLM)
monitoring................................................................................................................................ 77
Figure 29 - Dimming Transformer Tap Selection............................................................................. 80
Figure 30 - Connector PL5 .............................................................................................................. 81
Figure 31 - Connector PL3 .............................................................................................................. 84
Figure 32 - Connector PL7 .............................................................................................................. 85
Figure 33 - Connector PL2 .............................................................................................................. 86
Figure 34 - Connector PL6 .............................................................................................................. 87
Figure 35 –CPU PCB ..................................................................................................................... 88
Figure 36 –Flash Rate Settings ...................................................................................................... 89
Figure 37 –Phase Output Flash Selection....................................................................................... 90
Figure 38 –Relay Output Resistance Selection............................................................................... 90
Figure 39 –ST750 Phase Drive PCB Assembly .............................................................................. 91
Figure 40 –Links LK1 to LK4........................................................................................................... 93
Figure 41 –Handset.......................................................................................................................107
Figure 42 - Fuse Ratings................................................................................................................115
Tables
Table 1 –ST750 Supply Requirements ........................................................................................... 23
Table 2 –ST750 Lamp Drive Capability .......................................................................................... 23
Table 3 –ST750 Lamp Load (Watts)............................................................................................... 24
Table 4 –Detector Power Consumption........................................................................................... 24
Table 5 –ST750 Cabinet Assembly Size and Weight...................................................................... 31
Table 6 –Phase Drive PL6 Connector............................................................................................. 72
Table 7 –Phase Drive PL7 Connector............................................................................................. 73
Table 8 –Phase Drive PL8 Connector for ST750 Phase Driver PCB (6 Phase)............................... 74
Table 9 –Phase Drive SK1 Connector............................................................................................ 78
Table 10 –Phase Drive PL1 Connector........................................................................................... 78
Table 11 –Phase Drive SK2 Connector No Dimming...................................................................... 79
Table 12 –Phase Drive SK2 48V Dimming Connections................................................................. 79
Table 13 –Phase Drive PL5 Connector........................................................................................... 80
Table 14 –Processor Card PL3 Connector...................................................................................... 83
Table 15 –Processor Card PL7 Connector...................................................................................... 84
Table 16 –Processor Card PL2 Connector...................................................................................... 85
Table 17 –Processor Card PL6 Connector...................................................................................... 86
LAST PAGE...................................................................................................................................116

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1. INTRODUCTION
1.1 Purpose of this handbook
The purpose of this handbook is to give a general description and specification of
the ST750 Rack Assembly and the procedures for its Installation, Commissioning
and Maintenance in the ST750 Cabinet Assembly and other Cabinets. Also provided
is guidance on testing and maintenance procedures.
Note
Ongoing development means that some of the delivered items may
differ in detail from the information included in this handbook.
1.2 Contact Us
If you have any comments on this handbook, or need any further information, you
can contact us at [e-mail].
1.3 Reference Documents
1.3.1 Non-Essential Documents –Intersection Design
Publisher
Reference Number
Document Title
1.
Siemens
667/DS/20664/000
Traffic Signal Junction Cable Design &
Certification
2.
Siemens
667/HE/31699/000
Loop Inductance and Turns Calculation
Spreadsheet
3.
Siemens
667/DZ/33750/000
ST750 Family Tree
1.3.2 Essential Documents –Controller
Publisher
Reference Number
Document Title
4.
Siemens
667/SU/32900/000
ST900/750 Family Firmware and
Hardware Configurations
5.
Siemens
667/HH/32900/000
ST900/750 Family Handset Handbook
6.
Siemens
667/HB/32900/000
ST900 General Handbook
7.
Siemens
667/HB/33750/000
ST750 General Handbook (This
document)
8.
Siemens
667/DA/27880/000
ST750 UK Power Circuit Diagram
9.
Siemens
667/DA/27880/006
ST750 Non-UK Power Circuit Diagram
10.
Siemens
667/GA/33750/ETC
ST750 ELV Controller Cabinet Cabling
11.
Siemens
667/CC/32750/000
ST750 Family Controller Configuration
12.
Siemens
667/HB/32921/007
Handbook Supplement for Monitoring
Helios CLS (NLM) Signals

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667/HB/33750/000 Page 12 Issue 6
1.3.3 Essential Documents –Cabling
Publisher
Reference Number
Document Title
13.
Siemens
667/HE/20664/000
Installation and Commissioning
Handbook - Installation Testing
(General)
14.
Siemens
667/HE/20663/000
Loop Detector and Cable Terminations –
Installation and Commissioning
1.3.4 Essential Documents –Ancillary Equipment
Publisher
Reference Number
Document Title
15.
Siemens
667/HE/20662/000
Installation & Commissioning –Signals
& Poles
16.
Siemens
667/HE/20665/000
Installation and Commissioning
Handbook 5 - Above Ground Detectors
17.
Siemens
667/HB/43100/000
TC12 General Handbook
18.
Siemens
667/HB/32600/000
Gemini2Traffic Outstation Handbook
19.
Siemens
667/HB/27663/000
ST4R/ST4S Loop Detector Handbook
20.
Siemens
667/HB/22380/000
TCSU/TfL IMU Handbook
21.
Siemens
667/CC/29000/002
24 Volt Power Distribution Small Cabinet
22.
Siemens
667/CC/29000/003
24Volt Power Distribution Large Cabinet
1.4 Pre-Requisites
Anyone undertaking installation, commissioning and first line maintenance on the
ST750 controller will also need the ST900/750 Family Handset Handbook
(667/HH/32900/000). This provides details of how to access the controller handset
port through which the user communicates with the controller.
1.4.1 Qualifications
Only skilled or instructed personnel with relevant technical knowledge and
experience, who are also familiar with the safety procedures required when dealing
with modern electrical/electronic equipment, are to be allowed to use and/or work on
the equipment. All work shall be performed in accordance with the Electricity at
Work Regulations 1989 or the relevant local, state and government regulations.
Any personnel working on the ST750 Controller should have completed the
following training courses:
•M608 –Pedestrian Traffic Controller Maintenance (ST750 & ST750ELV)

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•Personnel should also comply with the Highways National Sector Scheme
Competency Requirements
Training requirements for non UK users may be different
1.4.2 REQUIRED TOOLS
In addition to a standard Engineer’s tool kit, the following tools are required when
carrying out any work on the ST750 Controller:
Part Number
T-bar key
667/2/20234/000
S-18 key –Main Cabinet
4/MC 289
Serial handset Techterm, or
667/4/13296/001
Old Oyster handset, or
667/4/13296/000
Larger Screened Oyster handset
667/4/13296/002
Manual Panel key Type 900
667/4/13651/000
1.5 Definitions
Cabinet
Assembly
The ST750 Rack Assembly installed in the ST750 Cabinet with
associated equipment mounting frame, mounting stool, mains
distribution, power supplies, electronic control and phase switching.
Configuration
data (also
referred to as
customer’s
data)
and site
specification
Data supplied by customer as to how the ST750 is to function.
EM
Controller identification number (ElectroMatic).
Firmware
EPROM
This goes on the Main Processor Board.
Pedestrian
stream
A group of Red, Amber and Green traffic signals plus their
associated Red Man, Green Man and Waits of the pedestrian
signals.
Rack Assembly
This consists of a box like frame with a plate hinge on the front that
acts as an access door. The Phase Drive PCB and PSU are mounted
behind the ST750 CPU PCB.

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STS
(Site to Scale)
This is a scale drawing of the intersection including Cabinet
Assembly position, detector loop positions and specification, cable
routing and poles with signal head arrangements.
Works
Specification
Document produced by Siemens, which details the hardware
required for the ST750 and includes Site Data, usually in the form of
a printout of the data entered on the configurator.
1.6 Abbreviations
AC Alternating Current
AGD Above Ground Detector
BIT Binary digit (i.e. `0' or `1')
CET Cable Earth Terminal
CLF Cableless Linking Facility
CLS Central Light Source
CPU Central Processing Unit
DC Direct Current
DFM Detector Fault Monitor
ELV Extra Low Voltage
EPROM Erasable Programmable Read Only Memory
FT Fixed Time
IC Integrated Circuit
IC4 ST800 Configurator
I/O Input/Output
I/P Input
LED Light Emitting Diode
LV Low Voltage
ms milliseconds
NLM No LMF Module
OMU Outstation Monitor Unit
OTU Outstation Transmission Unit
PCB Printed Circuit board
PLD Programmable Logic Device
PROM Programmable Read Only Memory
PSU Power Supply Unit
RAM Random Access Memory
RCD Residual Current Device
RFL Reset Fault Log (handset command)
RMS Root Mean Square
ROW Right Of Way
RTC Real Time Clock
SA Speed Assessment
SDE Speed Discrimination Equipment
ST Self Tuning
UTC Urban Traffic Control

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UTMC Urban Traffic Management and Control
VA Vehicle Actuated

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2. SPECIFICATION
The Specification that follows is for the ST750 Cabinet Assembly. Where
appropriate it also applies to the ST750 Rack Assembly as supplied for installation
in another Cabinet.
Non-UK specifications are detailed where they differ from standard UK
specifications.
2.1 Equipment Introduction
The ST750 is a Pedestrian Controller and Small Non-UK Traffic Controller and can
be supplied in either small or large single-door outer cases.
It can be supplied as
•Single Pedestrian controller (2 Phase)
•Dual Pedestrian Controller (4 Phase)
•Small Non-UK Controller (6 Phase)
Generally it comes as a fully fitted Cabinet Assembly with its own equipment,
mounting stool, mains distribution, power supplies, electronic control and phase
switching
This ST750 Cabinet Assembly can also accommodate Detectors, I/O PCB, OTU
PCB, an OMU Assembly, Manual Panel, Master Switch Assembly and a Dimming
Transformer.
It may also be fitted as a “Cuckoo” into many existing cabinets, when supplied as a
Rack Assembly consisting of the power/phase assembly and a CPU. There are a
number of conversion kits available that enable it to be installed into other cabinets.
The ST750’s electronics consist of three PCBs:
•The CPU PCB that contains most of the logic, which controls the system and the
extra low voltage inputs and outputs, i.e. detector inputs, audible outputs, etc.
•The Phase Drive PCB that contains most of the Mains distributions, the triac
phase drive outputs, voltage and current monitoring.
•The PSU (24V) that provides the main power supply for the ST750.
The CPU PCB operates under the control of both a main and a secondary
processor. The main processor is a Motorola 68340, which runs the firmware
controlling all the functions of the ST750’s operations. The secondary processor is
an Intel 80C31 controlling all the phase output switching and voltage monitoring.
The two processors communicate with each other through shared RAM. This dual

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processing provides additional safety features, as each processor continually
monitors the actions of the other, and independently turns off the lights to the
motorists and pedestrians if either processor causes an error.
The software is written in a powerful high level language that allows the
implementation of the ST750’s extensive facilities. The ST750 offers both Single
and Dual Pedestrian operation and up to a 6 Phase Traffic Controller operation,
each with solid state switching.
The power/phase assembly with its associated ST750 Phase Drive PCB and PSU
can drive up to 18 signal outputs with 230V at 4A. The pedestrian signals are
configurable to supply either 230V or 48V. Each of the two pedestrian streams has
current monitoring on two separate vehicle approaches for Red, Amber and Green
lamps plus one unmonitored approach Red lamp only. This provides TR2500A
compatible Red lamp monitoring for the Red lamps and lamp monitoring for the
Amber and Green lamps.
Note that a new ST750LED Phase Driver PCB provides lower current outputs, and
can monitor Helios LV CLS (NLM) signals. See 667/HB/32921/007 in Section 1.3.2
for further details.
The controller conforms to the UK Highways Agency specification TR2500A.
2.1.1 Single Pedestrian Controller
The ST750 Single Pedestrian Controller consists of one vehicle phase and one
pedestrian phase with a minimal set of I/O to perform all the functions of 2 phase
Pelican, Puffin or Toucan. These consist of 32 buffered inputs, 8 isolated relay
outputs, 2 Audible outputs and 1 Tactile Interlock output.
2.1.2 Dual Pedestrian Controller
The ST750 Dual Pedestrian Controller consists of 2 vehicle phases and 2
pedestrian phases with a minimal set of I/O to perform all the functions of 4 phase
Pelican, Puffin or Toucan. These consist of 32 buffered inputs, 8 isolated relay
outputs, 4 Audible outputs and 2 Tactile Interlock outputs.
2.1.3 Small Non-UK Controller
The ST750 Small Non-UK Controller consists of a 6 Phase Traffic Intersection
Controller. It is similar to the Pedestrian controllers, except in the following areas:
•It has 6 Phases
•It has no built in current lamp monitoring facilities
•It cannot be configured to output 48V from any of its Phase Drive
outputs.
2.1.4 Controller Expansion
Expansion may be achieved by adding combinations of the following equipment:

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•Inputs/Outputs PCB
This board can expand the inputs/outputs as follows:
16 Inputs
16 Outputs
•Detectors
These can be Siemens, Microsense or Sarasota self tuning units. Up to 4 units
can be accommodated in the ST750 cabinet, each unit having four detector
channels.
•Ancillary Equipment
OTU –Outstation Transmission Unit for Tele Command 12.
OMU –Outstation Monitoring Unit for Remote Monitoring System.
2.1.5 Types of Pedestrian Controller
A number of different types of pedestrian crossings are available on the ST750. The
following table lists the different types of ‘stand-alone’ pedestrian crossings detailed
in TR2500A:
Type of
Crossing
Ped. Signal
Position
Pedestrian to Vehicle
Clearance Period
“Pelican”
Far-side
Vehicle Flashing Amber
Pedestrian Flashing
Green
“Puffin”
Near-side
Vehicle Red
Pedestrian Red
“Pedestrian”
Far-side
Vehicle Red
Pedestrian Blackout
“Toucan”
Far-side
Vehicle Red
Pedestrian Blackout
“Toucan”
Near-side
Vehicle Red
Pedestrian Red
These are described in more detail in sections 3.1.1 to 3.1.3 titled ‘Pelican
Crossing’, ‘Near Sided Pedestrian Crossing’ (which covers both ‘Puffin’ and
‘Toucan’) and ‘Far Sided Pedestrian Crossing’ (which covers both ‘Pedestrian’ and
‘Toucan’).
The ‘on-crossing detectors’ are described in section 3.1.4, while ‘kerbside detectors’
are described in section 3.3.
2.1.6 Differences between the ST750 and the ST700
The ST750 differs functionally from the ST700 in the following ways:

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•CPU –A new variant of the CPU board is required for operation in the ST750.
Although the ST700 and ST750 CPU Cards look very similar, the ST750 requires
at least 512KB of RAM and only 256KB is fitted to most ST700 CPU Cards.
•PHP –PB801 and the ST750 require PB817 issue 5 or later; PB800 and the
ST700 can use PB817 issue 3 or later (which includes PB817 issue 5).
•IO –PB801 firmware on the ST750 controller continues to use the I/O built in to
the CPU Card, with the option of adding one ST800 style Expansion I/O Board.
•SDE –Integral SDE/SA is still used, using the I/O on the CPU Card. The
SDE/SA Card on the Extended System Bus is not supported by the firmware.
•Config –The standard stand-alone pedestrian configurations have changed. A
list of these can be found in the IC4 ReadMe file (v11) and in this document
(section 5.15). A list of the significant changes between a new ST750 standard
configuration and its original ST700 configuration is included in its Special
Instructions (from issue 2).
•Kerbsides –As required by TR2500A in the UK, pushbuttons now insert a
latched demand if they are pressed while their associated kerbside detector is
inactive. If its associated kerbside detector is active, an unlatched demand is
inserted (which is cancelled when all the kerbside detectors for the phase go
inactive).
•DFM –DFM Faults on the individual I/O lines no longer appear in the Fault Log
Data (FLD) and should be interrogated using the DSF handset command, which
also displays the I/O Line Number and IC4 Name as well as indicating whether
the input failed active (1) or inactive (0).
•DFM –The ‘Reset DFM’ facility (RDF=1 for example) will now clear the DFM
fault flag (FLF12) and extinguish the System Error LED.
•Priority –The ‘Automatic Reset’ option of the Priority DFM Facility (PDR) has
been improved so that a number of activations can be specified; the N’th
activation is allowed and the fault is automatically cleared.
•Handset –The handset now auto-detects Eight Data Bits with No Parity Bit (8N)
as well as continuing to support Seven Data Bits with an Even Parity Bit (7E) and
1200, 9600 and 19200 bps.
•Handset –Level 2 (PME) and Level 3 (Pushbutton) Access Timeout Periods are
restarted if Level 2 or 3 data is changed (including RFL=1 for example) or the
PME access code is re-entered.
•Config –The new CID handset command displays the firmware version (as
entered on the IC4 Admin Screen) ‘desired’ by the configuration currently
running a controller. The EM number and issue of the configuration is still visible
using the CIC handset command.
Note
The ST750 requires a CPU board with a /003 part number suffix for
UK applications or /007 for Non-UK applications. Earlier i.e. ST700
CPU boards can NOT be used in an ST750

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•Config –The version of firmware required by a new configuration is checked
before the existing configuration is erased. An “FLF 21:255 CPAT” fault logged if
the new configuration requires a later version of firmware. The version required
by the configuration which failed to load can be seen using the new CIE handset
command.
2.1.7 Spares Compatibility between the ST750 and ST700
With the exception of the CPU board all components of the ST700 system are
compatible with the ST750.
The ST750 requires a CPU board with a /003 part number suffix for UK applications
or /007 for Non-UK applications. Earlier i.e. ST700 CPU boards can NOT be used
in an ST750 due to the difference in RAM requirement.
If required, it is possible to use an ST750 CPU board to replace an existing or faulty
ST700 CPU board but it is NOT possible to use an ST700 CPU board to replace an
existing or faulty ST750 CPU board.
•To use an ST750 CPU in an ST700 it is required to change the firmware
(PROM) to PB800. In this case, the relevant ST700 configuration will also
need to be downloaded prior to use.
Warning!
On NO ACCOUNT is it permitted to downgrade an ST750 site to
an ST700 site by changing the CPU board and associated
firmware as an ST750 needs to conform to TR2500A which the
ST700 DOES NOT and CAN NOT
2.2 BASIC SYSTEM OVERVIEW
Control
Main Microprocessor
Motorola 68340
Firmware Storage
PROM (27C4002)
Working Data Storage
Static RAM (512K)
(Battery Backed)
Secondary Microprocessor
Intel 80C31
Firmware Storage
PROM (27C512)
Working Data Storage
Internal to Microprocessor Device
Inter-Processor Communications
Dual Port RAM 71321 (2K x 8)
Hardware Fail Flash
Programmable Logic Device
DIL Switches
Lamp Switching
Triac
Opto isolated, zero crossing
No Load at dimming changeover