Siemens ST750 - Single Backplane in 400 S Small Outercase and ST900 Large Outercase

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Page
27 of 73
Version 008
Status
Released
Last Editor Nathan Fearnhead
Date
16/06/2017
Document Name Configuration Control
Document No.
667/CC/32750/000
Copyright © Mobility 2017. All Rights Reserved. Mobility is a division of Siemens Plc
3.7.3 Single Backplane in 400S Small Outercase and ST900 Large Outercase
Eight Single Detector Backplanes can be specified in the ST750ELV. If three or less Single Back
planes are required they can be mounted in the Gemini/Detector Swing Frame. If more than three
Single Detector Backplanes are required in a 400S cabinet two 11” Rack Kits should be specified.
One 11” Rack Kit will accommodate the detector cards and will be mounted in the secondary
position. A second 11” Rack kit will be required to accommodate the Gemini Unit and will be
mounted in the primary position. Please refer to Figure 4 and Figure 18.
When single backplanes are to be specified, power should be obtained from the Back Plane Rack
Assembly, as shown in Figure 23 Figure 24 and Figure 23
Figure 24. Power (-24 VDC) should obtained from SKT5, terminals 1 to 8 of the
Back Plane Rack Assembly, and applied to pins 19 (+ve) and 20 (-ve) of the single backplane.
The connections will be made using red wire for positive and black wire for negative. Power
return will be connected between SKT3A on the Backplane Rack Assembly and pin 22 of the
Single Backplane using pink wire. The detector loop input common will be connected between
SKT6 on the Backplane Rack Assembly and pin 18 of the Single Backplane, using white wire.
The four inductive loop activation signals will be connected to the appropriate channels/pins on
the Single Back plane. Please refer to SLD4 Inductive Loop Detector Handbook for the necessary
information (667/HB/45200/001).
Figure 23 Figure 24
24 Vdc
power for
Detector
Backplane
Detector
Loop
Activation
Common
Power
Return
nc
nc
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
7
8
5
6
3
4
1
2
O/P Common
24V +DC
24V –DC
Earth
Loop
Activation
Output
Signals
Loop
Activation
Input
Signals
AC
Input