Specifications

Mobility and Logistics, Traffic Solutions

Sopers Lane, Poole, Dorset, BH17 7ER

Security classification Unrestricted Page 40 of 83

Version 2 Status Released

Last Editor Harry Smyth Date 09/12/2014

Document Name Configuration Control Document No. 667/CC/45950/000

3.14 Gemini

The ST950 Outercase is configured with a 19” Swing Frame and a Rack Assembly. With

reference to Figure 8 the area above the Rack Assembly is set aside for 3U sized Gemini

unit. Please also reference document 667/GA/27087/000, detailed in the related document

section of the document. A 19” Rack Kit will be fitted to the ST950 as standard and need not

ordered separately. When a 3U sized Gemini is specified it will be fitted on the right hand

side of the 19” Rack Kit, as seen from the front of the 19” Swing Frame in Figure 8.

The Master Switch Unit has one OTU Supply Kit fitted to provide power for the Gemini Unit.

A second kit may be fitted please refer to the parts listing for the appropriate part number.

The position of the kit is shown on diagram 667/GA/27121/000. The Gemini unit has several

applications; full information on the required configuration should be sought from the Gemini

Family Tree, detailed in the Related Document section. With reference to Figure 29, power

for the Gemini unit should be applied to PL1. It will be noted that the 19” Rack Assembly set

aside for the Gemini Unit will be largely empty when the Gemini is specified and completely

empty when Gemini Unit is not specified. Configuration Engineers and Production staff

should note that if this space is utilised to fit Backplanes the controller may require

substantial re-configuration at a later stage and should only be carried out if the work

specification directs this activity.

Figure 28 - Power for Gemini Unit

Warning! 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

Connection

to Gemini

Unit PL1