Cabinet Installation - Siemens ST950 Handbook

and at least 800mm away from the side of the case with a flap, again extending the
full width of that side.
Customers may specify particular requirements.
The door of the controller must have ground clearance of at least 30mm over its
whole opening arc.
7.2.1 Site Cable Installation
If new site cabling is being installed, refer to the following:
667/DS/20664/000 - Traffic Signal Junction Cabling & Design & Certification
7.3

Cabinet Installation

Prior to any installation works, firstly make sure that the cabinet has been delivered
to site without external physical damage.
The electronics should be removed from the controller and stored separately if:
•
The controller cabinet cannot be made waterproof
•
The cabinet will be un-powered and may suffer from condensation, moisture
ingress and/or animal/insect infestation
•
There is a risk of the cabinet being damaged on-site
•
The cabinet will be left in an un-powered state for a prolonged period.
7.3.1 Order of Installation
•
Remove the electronics from the controller
•
Remove the stool from the case, if not already separate
•
Remove the CET bars from the stool
•
Install the stool into the ground
•
Run cables to the controller.
•
Re-fit the CET bars to the stool
•
Terminate the cable armouring to the CET bars
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Copyright © Siemens Mobility Limited 2018. All Rights Reserved.
If common neutral return connections are used it is possible for the
failure of a return connection to cause unexpected signal displays,
where one or more signals within a given signal head are incorrectly
illuminated simultaneously. This lack of neutral return connection is not
detectable by the controller because the signal voltage presented at the
controller terminals does not exceed the required thresholds for conflict
or correspondence monitoring. It is therefore essential that individual
neutral returns are used for each green signal.
The signal connections in the pole cap MUST be kept physically apart
from other connections (above ground detector supplies etc) in order to
minimise the risk of short-circuits between the two.
Unrestricted
5
Neil Atkinson
ST950 ICM Handbook
Intelligent Traffic Systems
Sopers Lane, Poole, Dorset, BH17 7ER
Page 61 of 125
Status Issued
Date 18-Dec-2018
Document No. 667/HE/46950/000