Specifications

Mobility and Logistics, Traffic Solutions
Sopers Lane, Poole, Dorset, BH17 7ER
Security classification Unrestricted Page 23 of 83
Version 2 Status Released
Last Editor Harry Smyth Date 09/12/2014
Document Name Configuration Control Document No. 667/CC/45950/000
Copyright © Mobility 2014. All Rights Reserved. Mobility is a division of Siemens Plc
3.7 Intelligent Detector Backplanes
Intelligent Detector Backplanes do not form part of the base Controller Cabinet and therefore
should be specified separately. Each Intelligent Detector accommodates four SDL4 Cards.
Notes on the SLD4 Detector Cards are provided later in this document. Figure 12 provides a
listing of required components when selecting the Intelligent Detector Backplanes and
accompanying SLD4 cards. Please also refer to the parts list for these items.
With reference to Figure 8 and drawing 667/GA/27087/000, Intelligent Detector Backplanes
and associated SLD4 Detector Cards are fitted into 19” Racks Kits. As the numbers of
Intelligent Detector Backplanes increase the number of 19” Racks Kits required will increase.
Unless otherwise stated, in a work specification, the first 19” Rack Kit will be fitted to the 19”
Swing Frame below the Controller Rack Assembly. The first three Intelligent Detector
Backplanes will be fitted to this 19” Rack Kit. If more than three Intelligent Detector
Backplanes are required a second 19” Rack kit should be specified, which will be fitted
below the first 19” Rack Kit. The Intelligent Detector Backplane 4, 5 and 6 will be fitted to this
second 19” Rack kit. For further information on the inter-relationship between Intelligent
Detector Backplanes, SDL4 Cards, Processor Card and I/O Cards please consult the ST950
General Handbook. The area above the Rack Assembly in the 19” Swing Frame is
designated as the area for fitting a 19” Rack Kit, to mount a Gemini or Stratos Outstation
Unit (further information on the Gemini Unit or Stratos Outstation is provided later in this
document). With further reference to Figure 8, the Gemini or Stratos Outstation will be fitted
on the right hand side of a 19” Rack Kit, viewed from the front of the 19” Swing Frame.
Configuration Engineers should note when referencing the cases below that an Infrared
communications link provides automatic set-up between SLD4 cards. This link operates
horizontally but not vertically. To provide this link between vertically mounted SLD4 cards a
link cable should be fitted between Intelligent Detector Backplane on associated horizontal
levels. Please refer to parts listing for link cable. Please also refer to Figure 9 which shows
the required link.
Important Note
Configuration Engineers should read the notes in the WiMag section regarding
Backplane positioning. Important information on the relationship between SDL4
Cards, the Infrared communication link between SLD4 cards and the restrictions this
communication technique has on the positioning of SLD4 Cards is contained in the
that section.
Communications between CPU Card and Intelligent Detector Backplanes are carried out via
GSPI serial link, using Cat5e cable/RJ45 connector. The GSPI serial link communication
protocol relies on addressing techniques to ensure the appropriate information is delivered to
the intended component. This means that the order in which the components are connected
to the link is not imperative to successful communications. However, to maintain consistence
build configuration the sequence of connections set out in Table 2 should be used.
With reference to Figure 9, power is provided to the Intelligent Detector Backplanes from the
Detector Power Supply Kit. Additional power can be provided for Intelligent Detector
Backplanes, refer to paragraph 3.12.
Loop activation signals are passed to the Intelligent Detector Backplanes from the Loop
Terminal Card via PL8. Refer to paragraph 3.10 for information on Loop Termination Cards.