System Components - Siemens ST950 Handbook

The essential differences between the ST900ELV and the new ST950ELV 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.
ELV Lamp Switch Card(s)
ELV Lamp Switch cards (LSLS) provide 32 undedicated switched outputs. The
cards and are located within the cabinet and are plugged into a backplanes that
terminates the street cables. Very large intersections may have additional Lamp
Switch, I/O and Intelligent Detector Backplane cards located in an adjacent cabinet
for ease of installation and maintenance.
Power Supplies
The High Power Unit (HPU) module distributes the 48V lamp supply from the Lamp
Supply Transformer to the LSLS cards and incorporates the Dim/Bright, A and B
relays. This module is mounted on the left hand side of the cabinet close to the
lamp supply transformer.
The Logic Power Unit (LPU) module provides logic supplies to the CPU Card and
I/O cards and is housed within the 19" logic rack.
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Copyright © Siemens plc 2020. All Rights Reserved.
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manpreet.jeerh
ST950 ICM Handbook
Mobility, Intelligent Traffic Systems
Sopers Lane, Poole, Dorset, BH17 7ER
Page
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Date
Document No.
Mobility is a division of Siemens Plc
2
18 of 154
Issued
January 2020
667/HE/45950/000