System Components - Siemens ST950 Handbook

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 Gemini
•
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:
Security classification
Version
Last Editor
Document Name
Copyright © Siemens Mobility Limited 2018. All Rights Reserved.
Unrestricted
5
Neil Atkinson
ST950 ICM Handbook
Intelligent Traffic Systems
Sopers Lane, Poole, Dorset, BH17 7ER
Page 14 of 125
Status Issued
Date 18-Dec-2018
Document No. 667/HE/46950/000
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