Siemens ST950 User manual

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Document Name
ST950 ICM Handbook
Document No.
667/HE/46950/000
Copyright © Siemens Mobility Limited 2018. All Rights Reserved.
ST950 ICM Handbook
667/HE/46950/000
for
ST950
THIS DOCUMENT IS ELECTRONICALLY APPROVED
AND HELD IN THE SIEMENS DOCUMENT CONTROL TOOL
All PAPER COPIES ARE DEEMED UNCONTROLLED COPIES
Prepared By
Checked and Released
Division/BU
Mobility, Intelligent Traffic Systems
Mobility, Intelligent Traffic Systems
Department
Engineering
Engineering
Name
C.Rabe & K.R.Napper
D.A.Martin
Function
Lead Engineer
Engineering Manager
Date
December 2018
December 2018
COPYRIGHT STATEMENT
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.
Copyright Siemens Mobility Limited 2018 All Rights Reserved
SAFETY INFORMATION
IT IS RECOMMENDED THAT DUE TO THE HAZARDS PRESENT WITHIN
THE CONTROLLER CABINET ALL POWER TO THE CABINET IS
DISCONNECTED BEFORE REMOVING OR INSTALLING ANY EQUIPMENT
INTO THE CABINET. WHERE A RISK ASSESSMENT AND METHOD
STATEMENT FOR THE WORKS TO BE COMPLETED AND / OR THE INSTRUCTIONS

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FOR THE OEM EQUIPMENT BEING INSTALLED OR REMOVED ALLOWS, LIVE
WORKING MAY BE CONSIDERED.
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:
•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.
•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:
•The equipment must be correctly connected to the specified incoming power supply.
•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.
•Any power tools must be regularly inspected and tested.
•Any ladders used must be inspected before use to ensure they are sound and not
damaged.
•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.
•Any personnel working on site must wear the appropriate protective clothing, e.g.
reflective vests, etc.
In the event of any person working elsewhere on the junction, it is recommended that the
Mains Supply to the controller be switched off and the master switch locked in the ‘off’
position.
If you are not certain that the entire system is ELV, you must switch off
the Mains Supply to the controller and lock the Master Switch in the ‘off’
position.
If the controller uses an Expansion Cabinet, and in the exceptional
circumstances that the expansion cabinet also needs a mains supply (to
be avoided wherever possible), then the supply to the expansion cabinet
must also be switched off and the master switch in the expansion cabinet
locked in the off position.
To ensure and guarantee isolation the double pole master switch should be opened.
When re-commissioning signals, the following sequence is recommended to ensure that the
correct signal startup sequence is followed:

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•Switch OFF the controller at the main switch
•Switch ON the lamps at the Manual Panel on/off switch
•Switch ON the controller at the main switch
More specific safety information is given in the text of the handbook, where it relates to
particular activities or situations.
For Hardware Fail Flash (HFF) Controllers Only (non UK only):
If the controller needs to be changed to HFF after being installed (non UK only) the following
procedure must be followed:
•Ensure that the power to the controller is switched off
•Move the "Flash" switch (S3) on the CPU Card to its non-HFF position
•Run the Controller Self-Test and confirm that it indicates that the controller hardware is
set up for HFF. Note that the signals will not flash when the controller is powered
because the switch on the CPU Card is in the non-HFF position
•Switch off the power to the controller
•Move the switch on the CPU Card to its HFF position
•Switch on the power to the controller and ensure that the correct traffic signals flash as
the controller starts
There are various RJ45 connectors used to connect to peripheral cards
within the ST950 family of controllers. Most are not Ethernet ports and
should not be connected to other equipment, including PCs.
Please note that the internal 24V DC supply should NOT be used for any
equipment outside of the main controller cabinet.

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To isolate the equipment, the Master Switch must be in the “Off”
position.
Removal of the Electricity Board Fuse or Switching the Controller switch or the Manual Panel
Signals On/Off switch to “Off” does not guarantee isolation of the equipment.
Controller Configuration
Controllers require specific configuration to enable them to function correctly when installed.
The configuration process is a complex activity and should only be carried out by persons
who are adequately trained, have a full understanding of the needs of the county or region
were the controller is to be used and are experienced in the tasks to be undertaken.
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 junction 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
controller or signal poles.
Safety Warning - Lithium Battery
This equipment may contain a Lithium coin cell (battery) if the optional RTC battery backup
kit is installed.
Do not short circuit, recharge, puncture, take apart, incinerate, crush, immerse, force
discharge, ingest 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 battery is a sealed unit which is not hazardous when used according to these
recommendations. Do not breathe vapours or touch any internal material with bare hands
should the cell become damaged in any way.
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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Contents
1Introduction...................................................................................................................7
1.1 Purpose.............................................................................................................7
1.2 Contact Us.........................................................................................................7
1.3 Reference Documents.......................................................................................7
1.4 Pre-Requisites...................................................................................................8
1.5 Definitions..........................................................................................................9
1.6 Abbreviations...................................................................................................10
1.7 Third Party Information ....................................................................................12
1.8 Trademarks......................................................................................................12
2System Overview........................................................................................................13
2.1 Features ..........................................................................................................13
2.2 System Components........................................................................................14
3Hardware overview .....................................................................................................17
3.1 The Controller Cabinet.....................................................................................17
3.2ST950 Non UK Controller Racks......................................................................20
4ST950 System Components........................................................................................24
4.1 Mains Distribution Unit.....................................................................................24
4.2 Dimming Transformer......................................................................................26
4.3 CPU Card........................................................................................................26
4.4 Heart of the Controller......................................................................................35
4.5 Gemini2...........................................................................................................36
4.6 I/O Cards.........................................................................................................36
4.7 CPU I/O Card...................................................................................................39
4.8 Intelligent Detector Backplane Card.................................................................40
4.9 Loop Detector Cards........................................................................................42
4.10 Lamp Switch Cards..........................................................................................43
4.11 Manual Panel...................................................................................................46
4.12 Pedestrian Audible/Tactile Indications..............................................................49
4.13 Above Ground Detectors..................................................................................55
5User Interface .............................................................................................................56
5.1 Connection ......................................................................................................56
5.2 Types of User Interface....................................................................................56
6Fitting The Controller Into Alternative Cabinets ...........................................................58
7Installation and Commissioning Procedure..................................................................59
7.1 Service-Centre Cabinet Testing.......................................................................59
7.2 Checking Site Suitability ..................................................................................60
7.3 Cabinet Installation ..........................................................................................61
7.4 On Site Testing................................................................................................67
7.5 Controller Commissioning................................................................................67
7.6 Customer Acceptance......................................................................................82
8Leaving Site................................................................................................................83
9Routine Maintenance Procedures ...............................................................................83
9.1 Routine Inspection of Signal Equipment...........................................................84

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9.2 Routine Inspection and Electrical Testing of Controller ....................................84
9.3 Routine Setup Check.......................................................................................86
9.4 Other Maintenance Operations........................................................................86
10 Fault Finding...............................................................................................................87
10.1 Site Visits.........................................................................................................87
10.2 Fault Finding Starting from the Fault Indications ..............................................88
10.3 Replacement of Cards.....................................................................................90
10.4 Replacing Components Other Than Cards ....................................................100
10.5 Logging/Recording Faults and Visits..............................................................100
11 The Self-Test Facility.................................................................................................101
11.1 Introduction....................................................................................................101
11.2 Structure of Self Test.....................................................................................101
11.3 Manual Panel Checks....................................................................................103
11.4 Self Test Handset Output Prior to Lamp Supply.............................................103
11.5 Test Failures..................................................................................................108
11.6 Self-Test Handset Output After Lamp Supply On...........................................111
Appendix A Part Numbers and Spares List...................................................................120
Change History
Version
Date
Change
Author
1
October 2013
Initial Draft
C. Rabe
2
January 2014
TS007325
C. Rabe
3
May 2014
TS007425
K.R.Napper
4
November 2018
TS008205
D.Martin
5
December 2018
TS009064
N.Atkinson
The electronic version of this handbook can be found on the Siemens website
www.siemens.co.uk/traffic in the Handbooks section under Downloads.

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1 INTRODUCTION
1.1 Purpose
The purpose of this handbook is to describe the procedures for the Installation and
Commissioning of the ST950 LV Controller and to provide guidance on routine
maintenance and fault finding.
This handbook has been created in accordance with the requirements of BS EN
12675:2001 and BS 7987:2001.
Ongoing development means that some of the delivered items may differ
in detail from the photographs 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 Controller (Essential)
Publisher
Reference Number
Document Title
ITS
667/SU/46000/000
Use of ST950 Firmware and Hardware
Configurations
ITS
667/HB/46000/000
ST950 Family General Handbook
ITS
667/HH/46000/000
ST950 Family Handset Handbook
ITS
667/HU/46000/000
ST950 User Interface Handbook
ITS
667/DA/46000/001
ST950 LV UK Power Circuit Diagram
ITS
667/GA/33900/ETC
General Assembly Schematic
1.3.2 Cabling (Essential)
Publisher
Reference Number
Document Title
ITS
667/HE/20664/000
Installation and Commissioning Handbook -
Installation Testing (General)
ITS
667/HE/20663/000
Loop Detector and Cable Terminations –
Installation and Commissioning

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1.3.3 Ancillary Equipment
Publisher
Reference Number
Document Title
ITS
667/HE/20662/000
Installation & Commissioning –Signals &
Poles
ITS
667/HE/20665/000
Installation and Commissioning Handbook 5 -
Above Ground Detectors
ITS
667/HB/32600/000
Gemini2 Traffic Outstation Handbook
ITS
667/HB/27663/000
ST4R/ST4S Loop Detector Handbook
ITS
667/HB/45200/000
SLD4 Loop Detector Handbook
ITS
667/HB/30000/000
Helios General Handbook
1.3.4 Intersection Design
Publisher
Reference Number
Document Title
ITS
667/DS/20664/048
Traffic Signal Junction Cable Design &
Certification for ELV Systems
ITS
667/HE/31699/000
Loop Inductance and Turns Calculation
Spreadsheet
ITS
667/DJ/27000/000
Controller Forms User’s Handbook
ITS
667/DZ/45950/000
ST950ELV Family Tree
ITS
667/DZ/46950/000
ST950 Family Tree
ITS
667/HB/20168/000
IC4 Configurator Handbook
1.4 Pre-Requisites
Before reading this handbook, you should be familiar with the ST950 General
Handbook 667/HB/46000/000.
Anyone undertaking installation, commissioning and first line maintenance on the
ST950 family of controllers will also need the ST950 User Interface Handbook
(667/HU/46000/000) which provides details of how to connect to the controller and
the different user interfaces which are available. If the handset interface is chosen
to be used then the ST950 Handset Commands Handbook (667/HH/46000/000) will
also be required..
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.

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Any personnel working on the ST950 family of controllers should have completed
the following training courses:
•HA Sector Scheme Sector 8 Modules 5XX
•M609 –Junction Traffic Controller Maintenance for ST950 / ST950ELV
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 ST950 family of controllers.
User Interface
One of the following is required depending on the user interface chosen to be used
during the installation.
Description
Part Number
Compatible browser + USB cable (A to B)
Compatible terminal emulator + USB cable (A to B)
Netbook kit + USB cable (A to B)
667/1/32380/000
Serial handset Techterm + RS232 cable
667/4/13296/001
Old Oyster handset + RS232 cable
667/4/13296/000
Larger Screened Oyster handset + RS232 cable
667/4/13296/002
Cabinet Access
One or more of the following will be required to gain access to the controller
cabinet.
Description
Part Number
T-bar key
667/2/20234/000
S-18 key –Main Cabinet *
4/MC 289
Manual Panel key Type 900
667/4/13651/000
* - In some areas customers specified keys may be used
1.4.3 Spares
See the appendix for a full list of spares that are necessary when carrying out a site
visit to the controller, whether for installation, commissioning or maintenance.
1.5 Definitions
Item
Definition
Bit
Binary digit (i.e. `0’ or `1’)

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Byte
Eight bit data array (i.e. bits 0-7, and 8-15 are bytes)
Configuration data
(aka Customer
Data) and site
specification
Data supplied by the customer as to how the controller is to
function. It is recommended that the Controller Forms
Handbook be used as the blank form for this.
EM
Controller identification number (ElectroMatic).
CIC
Configuration Identity Code (equivalent to EM above)
GVP
Generic Versatile Platform - used by ST950 and other
Siemens products to provide general services such as
comms, user interface, etc.
STS
(Site to Scale)
A scale drawing of the intersection including controller
position, detector loop positions and specification, cable
routing and poles with signal head arrangements.
Word
Two-byte data array (i.e. bits 0-15 constitutes a data word)
Works
Specification
Document produced by Siemens, which details the hardware
required for the controller and includes Site Data, usually in
the form of a printout of the data entered on the configurator.
1.6 Abbreviations
Abbreviation
Meaning
AC
Alternating Current
CLF
Cableless Linking Facility
CLU
Cableless Linking Unit
CPU
Central Processing Unit
CRC
Cyclic Redundancy Code
CRL
Certificate Revocation List
DC
Direct Current
DFM
Detector Fault Monitor
DHCP
Dynamic Host Configuration Protocol
DNS
Domain Name System
DPR
Dual Port RAM
ELV
Extra Low Voltage
GSPI
Generic Serial Peripheral Interface
HI
High Intensity

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HFF
Hardware Fail Flash
HPU
High Power Unit
HTTP
Hypertext Transfer Protocol
HTTPS
HTTP Secure
IC4
Intersection Configurator v.4 (UK controller configuration application)
IDB
Intelligent Detector Backplane
I/O
Input/Output
ITS
Intelligent Traffic Systems
KOP
Kit of Parts
LED
Light Emitting Diode
LMU
Lamp Monitoring Unit
LPU
Logic Power Unit
LSLS
Lamp Switch Low-Voltage Serial
NTP
Network Time Protocol
OCSP
Online Certificate Status Protocol
OTU
Outstation Transmission Unit
OSS
Outstation Support Server (may be stand-alone or part of Stratos)
PCB
Printed Circuit Board
PI
Periodic Inspection
PROM
Programmable Read Only Memory
RAM
Random Access Memory
RCD
Residual Current Device
rms
Root Mean Square
RMS
Remote Monitoring System
RTC
Real Time Clock
SA
Speed Assessment
SDE
Speed Discrimination Equipment
TCP
Transmission Control Protocol
TLS
Transport Layer Security
UDP
User Datagram Protocol
UTC
Urban Traffic Control

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VA
Vehicle Actuated
1.7 Third Party Information
Embedded in this product are free software files that you may copy, distribute
and/or modify under the terms of their respective licenses, such as the GNU
General Public License, the GNU Lesser General Public License, the modified BSD
license and the MIT license. In the event of conflicts between Siemens license
conditions and the Open Source Software license conditions, the Open Source
Software conditions shall prevail with respect to the Open Source Software portions
of the software.
On written request within three years from the date of product purchase and against
payment of our expenses we will supply source code in line with the terms of the
applicable license. For this, please contact us at:
Open Source Clearing
Product Development
Engineering Department
Siemens Mobility Intelligent Traffic Systems
Sopers Lane
Poole
Dorset
BH17 7ER
UK
Generally, these embedded free software files are distributed in the hope that they
will be useful, but WITHOUT ANY WARRANTY, without even implied warranty such
as for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE, and
without liability for any Siemens entity other than as explicitly documented in your
purchase contract.
All open source software components used within the product are listed on the
controller's web and mass storage device interfaces.
1.8 Trademarks
The following terms used in this document are trademarks of their respective
owners:
•Android is a trademark of Google Inc.
•Linux is the registered trademark of Linus Torvalds in the U.S. and other
countries.
•SD is a trademark of SD-3C, LLC in the United States, other countries or
both.
•USB is a trademark of USB Implementers Forum, Inc.
•Windows is a registered trademark of Microsoft Corporation in the United
States and other countries.

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2 SYSTEM OVERVIEW
The Siemens ST950 Controller family is the latest in a long line of highly integrated
traffic controllers.
The ST950 family of controllers can be supplied either in a single-door outer case
with a 6U logic rack and equipment mounting frame or as a free-standing logic rack
housing the power supply, CPU Card and Lamp Switch cards.
2.1 Features
The main features of the ST950 family are:
•Conforms to the UK Highways Agency specification TR2500
•32 phases, 32 stages.
•8 streams.
•8 maximum green sets.
•8 hurry calls which are in priority order.
•8 uni-directional detector loop units.
•Multi-mode operation with stage ripple change facility for improved
intersection capacity.
•Fully integrated MOVA7, UTMC OTU and Stratos monitoring functionality
•Fully integrated Light Rapid Transport (LRT) mode for use at Tram / Road
intersections.
•Fully configurable lamp sequences for worldwide application.
•Fully integral and configurable lamp monitoring of both incandescent and LED
signals.
•Flexible part-time and start-up modes, allowing any stream to be sent in and
out of part-time mode without affecting any others.
•Cableless linking (Plan) facility with sophisticated plan timetables and 32 plan
groups.
•Event timetable which supports actions based on 32 independent events with
easy programming.
•Time system with full date details –automatically time synchronised to central
system where the controller linked to Siemens UTMC central system.
•Date stamped rolling log providing detailed history of events and faults,
coupled with improved presentation to aid recognition of entries.
•Uncomplicated web browser user interface capable of multi-language support
•Support for up to 248 I/O lines via I/O cards and Intelligent Detector
Backplanes
•RS232 and USB interfaces for handset, modem and GPS
•Major configuration changes with signals on

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The essential differences between the ST900 and the new ST950 family of
controllers are:
•New CPU Card providing additional functionality and interfaces
•Improved user interfaces including web pages
•I/O card firmware can be updated in-situ.
•Support for existing ST900 equipment such as Gemini and Gemini2
•Integral MOVA7, OTU functionality and Stratos monitoring options
•Removable Storage device contains junction specific data allowing fast repair
by card replacement and storage device transfer
•Extended features licensed through encrypted license card
•Integrated Ethernet interface
•USB interfaces for handset, memory devices, and license card readers
•The ST800/ST900 Extended System Bus interface is no longer provided on
the ST950 which means that the IRM, OTU Card, SDE/SA Card no longer
supported
2.2 System Components
CPU Card
The CPU Card performs all high level control functions for the junction and
communicates with the peripheral I/O cards using high speed serial communication
protocols. The physical interfaces are the same as those used in the ST900 family
of controllers. An updated I/O card protocol improves system performance and adds
functionality. This protocol is known as GSPI - Generic Serial Peripheral Interface.
Older I/O cards will need to be updated to allow communication with the ST950.
ST950 compatible I/O cards are easily recognized by the text 'I/O CARD
667/1/32990/95x' printed on the board cover.
Lamp Switch Card(s)
The Lamp Switch cards provide 8 phase dedicated RAG switched outputs. The
cards and are located within the Logic Rack and use wiring looms to interface with
terminal blocks that terminate the street cables. Very large intersections may have
additional I/O and Intelligent Detector Backplane cards located in an adjacent
cabinet for ease of installation and maintenance.
Power Supplies
The Mains Distribution Unit (MDU) module distributes the mains lamp supply from
the incoming supply and incorporates the Dim/Bright, A and B relays. This module
is mounted in the Logic Rack on the left hand side.
The MDU also provides logic supplies to the CPU Card and I/O cards.
I/O Cards
I/O cards take a number of forms, all of which are GSPI peripherals:

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•24in 16out panel mounted module - 667/1/46085/001
•24in 4out panel mounted module - 667/1/46085/002
•Intelligent Detector Backplane - 667/1/32910/950
•St950 CPU I/O kit 24in 4out - 667/1/46014/000
•WiMag Standard Interface kit - 667/1/47210/100
The panel mounted modules 667/1/46085/xxx are mounted on the rear panel of the
controller cabinet and allow direct termination of street cabling without resorting to
the use of additional terminal blocks and soft wire conversion kits.
The ST950 CPU I/O card cannot be used in a standard ST950 cabinet, it can only
be used in 3rd party cabinets.
The Intelligent Detector Backplanes are mounted in the rack. These provide support
for the connection of up to 4 standard Loop Detector Cards such as Siemens SLD4.
The Backplane connects via a ribbon cable to the Loop Termination Board mounted
on the cabinet rear panel. The Loop Termination Board provides the termination
point for 16 Loop Feeder pairs without the use of additional terminal blocks and
twisted wire kits.
All Loop Detector Cards are powered from a separate detector supply.
The main components of the ST950 system are shown in Figure 1.
Please note that the internal 24V DC supply should NOT be used for any
equipment outside of the main controller cabinet.

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L
N
DETECTOR
TERMINATION
BOARDS
24V AC
DET
SUPPLY
24V AC
Terminal
Block
24V AC to
AGDs
MDU
L
N
LAMP
CARD
LAMP
CARD
LAMP
CARD
I/O BOARDS
24 INPUTS AND
EITHER 16,
OR 4 OUTPUTS
HANDSET
PORT
Processor Card
LSLS
SIO
SIO
MANUAL PANEL
Manual
Panel
ABC
D
EFG
H
Lamp Switch
Card
Lamp Switch
Card
Lamp Switch
Card
Lamp Switch
Card
POWER SUPPLY &
LAMP SUPPLY
RELAY CONTROL
Parallel
Phase Bus
LOOPS
LOOPS
RJ45 Serial
Connections to IO
SLD4
LOOP
DETECTOR
POWER
MODE
L1
L2
L3
L4
SERIAL
LEDENABLE / RESET
SIEMENS
ON(1) OFF(0)
S4
S3
S2
S1
S4
S3
S2
S1
S4
S3
S2
S1
S4
S3
S2
S1
ON(1) OFF(0)
SLD4
LOOP
DETECTOR
POWER
MODE
L1
L2
L3
L4
SERIAL
LEDENABLE / RESET
SIEMENS
ON(1) OFF(0)
S4
S3
S2
S1
S4
S3
S2
S1
S4
S3
S2
S1
S4
S3
S2
S1
ON(1) OFF(0)
SLD4
LOOP
DETECTOR
POWER
MODE
L1
L2
L3
L4
SERIAL
LEDENABLE / RESET
SIEMENS
ON(1) OFF(0)
S4
S3
S2
S1
S4
S3
S2
S1
S4
S3
S2
S1
S4
S3
S2
S1
ON(1) OFF(0)
SLD4
LOOP
DETECTOR
POWER
MODE
L1
L2
L3
L4
SERIAL
LEDENABLE / RESET
SIEMENS
ON(1) OFF(0)
S4
S3
S2
S1
S4
S3
S2
S1
S4
S3
S2
S1
S4
S3
S2
S1
ON(1) OFF(0)
SLD4
LOOP
DETECTOR
POWER
MODE
L1
L2
L3
L4
SERIAL
LEDENABLE / RESET
SIEMENS
ON(1) OFF(0)
S4
S3
S2
S1
S4
S3
S2
S1
S4
S3
S2
S1
S4
S3
S2
S1
ON(1) OFF(0)
SLD4
LOOP
DETECTOR
POWER
MODE
L1
L2
L3
L4
SERIAL
LEDENABLE / RESET
SIEMENS
ON(1) OFF(0)
S4
S3
S2
S1
S4
S3
S2
S1
S4
S3
S2
S1
S4
S3
S2
S1
ON(1) OFF(0)
SLD4
LOOP
DETECTOR
POWER
MODE
L1
L2
L3
L4
SERIAL
LEDENABLE / RESET
SIEMENS
ON(1) OFF(0)
S4
S3
S2
S1
S4
S3
S2
S1
S4
S3
S2
S1
S4
S3
S2
S1
ON(1) OFF(0)
SLD4
LOOP
DETECTOR
POWER
MODE
L1
L2
L3
L4
SERIAL
LEDENABLE / RESET
SIEMENS
ON(1) OFF(0)
S4
S3
S2
S1
S4
S3
S2
S1
S4
S3
S2
S1
S4
S3
S2
S1
ON(1) OFF(0)
LOOP DETECTORS
DETECTOR
BACKPLANES
Max 4 Detector
Cards Each
(16 Inputs)
INPUTS INPUTS
OUTPUTS OUTPUTS
INPUTS
INPUTS
OUTPUTS
OUTPUTS
INPUTS
OUTPUTS CPU I/O CARD
Mounted on
Processor Card
24 Inputs + 4 Outputs
Figure 1 –System Overview

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3 HARDWARE OVERVIEW
3.1 The Controller Cabinet
Figure 2 and Figure 3 show the ST950 controller fitted in an ST950 Controller
Cabinet.
CET bars are installed in the base of the cabinet. The Master Switch Panel is
installed on the right hand side panel of the cabinet. Up to three I/O cards, dimming
transformer, termination blocks and cabling are installed on the rear panel of the
cabinet.
The 19” Controller Rack is installed in an equipment frame at the front of the
cabinet; this frame can be swung open to enable access to the rear of the frame
and to the cards and components installed in the cabinet.
Figure 2 –ST950 Controller Cabinet

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Figure 3 –Controller Cabinet showing new equipment
The Controller Rack
Figure 4 and Error! Reference source not found. show the ST950 controller in a
6U 19" rack.
The left-hand part of the rack contains the mains distribution unit (MDU) that
contains the logic power supply, the lamp supply relays, the maintenance sockets
and the controller’s power off/on switch.
Situated in the middle are the four Lamp Switch cards, connected to each other,
and to the CPU Card, by the phase bus ribbon cable connectors across the front.
Connectors on the back of the rack provide the mains connections to the Lamp
Switch cards. Each Lamp Switch card can control up to eight phases, giving a total
capability of 32 phases, with the first card being the one closest to the Main
Processor (i.e. on the right), with phase A at the top.
There is space above and below the controller rack for further equipment racks to
be fitted, as shown in Figure 2. These can accommodate loop detector cards and
Gemini2equipment.
For some cabinets additional kits of parts are available. These are listed on the
ST950 Family Tree (667/DZ/46950/000). The kits provide the necessary installation

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instructions, brackets and other equipment that may be helpful during the
installation.
The standard controller items are used with these kits and are listed in the ST950
Family Tree. Refer to Siemens Poole for the latest copy.
Figure 4 –ST950 19” Rack - Front
Note that a LED UK MDU is shown.

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Figure 5 –ST950 19” Rack - Rear
3.2 ST950 Non UK Controller Racks
The ST950 Non UK variants provide a self contained controller providing all of the
power supply and control functions located within a single rack.
The rack variants contain the following:
•MDU containing all controller mains distribution, fusing and switching
•CPU Card with integrated I/O card (16 input / 4 output) (Additional I/O cards
can be plugged in and located outside of the rack assembly)
•11” rack with Lamp Switch card(s) providing up to 16 phases (2 LSCs)
•19” rack with Lamp Switch card(s) providing up to 32 phases (4 LSCs)
•Lamp Switch card variants for 4 & 8 phases per card (4 Phase halogen only)
•Lamp Switch cards for Halogen or LED loads