Mobility and Logistics, Traffic Solutions
Sopers Lane, Poole, Dorset, BH17 7ER
Security classification
property name.
Page
29 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
3.9 Gemini² Unit
3.9.1 Gemini² Unit in 400S Small Outercase
When a configuration dictates that a Gemini
2
unit is to be fitted, it can mounted in one of two
methods, depending on the quantity of Detector Cards required. If four or less Detector Cards are
specified then the single Gemini
2
unit will be accommodated in a Gemini/Detector Swing Frame,
refer to Figure 26 Figure 27. If more than four Detector Cards
are specified then an 11” Swing Frames must be specified. With reference to paragraph 3.7,
Figure 16 Figure 17 and Figure 16
Figure 17, the Detector Cards will be mounted in an 11” Detector Rack
Assembly, in the primary position. An additional 11” Rack Assembly should be placed in its
secondary position to accommodate the Gemini
2
unit, refer to Figure 26
Figure 27. The specification of the appropriate parts is detailed in Figure 29.
Note: The following configurations will need to be ordered:
1. One Gemini², one intelligent backplane = Gemini/Detector Swing Frame.
2. One Gemini², one intelligent backplane = 11” Rack + Swing Frame.
3. One Gemini² + Expansion I/O Kit, one or more intelligent backplane = 2 x 11” Racks +
Swing Frame.
4. One Gemini² (GSM Modem), one or more intelligent backplane = 2 x 11” Racks + Swing
Frame.
Figure 26 Figure 27
Warning! Figure 26 Figure 27 show a Gemini² unit, full
configuration details of which are detailed in the above paragraph. It is important that the
Gemini Last Gasp Dial Battery, within the Gemini Power Supply Unit, is orientated
correctly; the battery terminal must be facing up. If the unit is to be mounted in such a way that
the battery terminals are not facing up then it is necessary to implement certain modifications to
ensure that the battery is not operating upside down. Please refer to document
667/HB/32600/000 for the necessary modifications.
Mains Supply will be connected to the Gemini
2
unit Power Supply PCB, on PL1 - refer to Figure
26 below. With reference to paragraph 6.4, mains supply is derived for the Gemini
2
unit from a 6A
Mini Circuit Breaker on the Master Switch Assembly.
Gemini²
position
with <= 4
Detector
Position of
3
rd
and 4
th
Detector
Cards
Position of
Gemini² in
11” Rack
Assembly
secondary
position
and 11”
Swing
Frame
SLD4
replaces
ST4S
shown
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