Fitting The Controller Into Alternative Cabinets (Cuckoo); Mains Input - Siemens ST950 Handbook

3.2.1 ST950 Non UK Controller Racks
The ST950 Non UK variants provide a self contained controller providing all of the
power supply and control functions located within a single rack.
The rack variants contain the following:
MDU containing all controller mains distribution, fusing and switching
CPU Card with integrated I/O card (16 input / 4 output)
(Additional I/O cards can be plugged in and located outside of the rack
assembly)
11" rack with Lamp Switch card(s) providing up to 16 phases (2 LSCs)
19" rack with Lamp Switch card(s) providing up to 32 phases (4 LSCs)
Lamp Switch card variants for 4 & 8 phases per card (4 Phase halogen only)
Lamp Switch cards for Halogen or LED loads
3.3

Fitting the Controller into Alternative Cabinets (Cuckoo)

The above ST950 and ST950 Non-UK Controller Racks allow the ST950 Controller to
be fitted into an enclosure other than an ST950 cabinet – This is known as a 'Cuckoo'
installation. In the UK, the controller may only be fitted into an HA-approved enclosure.
The procedure for Cuckooing an ST950 controller into an alternative enclosure is very
dependent on the type of enclosure and the type and position of existing equipment.
Detailed installation instructions are included in the drawings contained in
the kit relevant to the cabinet.
3.4

Mains Input

When considering the connection of the controller to the incoming mains
supply, it is important to verify from the supplier that the mains supply
short-circuit current does NOT exceed 16,000 Amps.
If the mains supply short-circuit current can exceed 16,000 Amps, refer to Siemens
Poole for further information.
The Master Controller Switch is a double-pole isolator and this must be
switched off before replacing the Master Controller Fuse.
Security classification
Version
Last Editor
Document Name
Copyright © Siemens plc 2015. All Rights Reserved.
Unrestricted
4
Paul Cox
ST950 General Handbook
Mobility Division, Traffic Solutions
Sopers Lane, Poole, Dorset, BH17 7ER
Page 24 of 107
Status Issued
Date 16-Jul-2015
Document No. 667/HB/46000/000
Mobility is a division of Siemens Plc