Mobility, Intelligent Traffic Systems
Sopers Lane, Poole, Dorset, BH17 7ER
Figure 5 – ST950 ELV 19" Rack - Rear
3.3 ELV Controller Expansion Cabinet
For large junctions, it may be necessary to fit an expansion cabinet adjacent to the
primary cabinet. The Expansion Cabinet Kit does not have a connection to the
mains supply and is typically used to house IO cards and their associated cabling.
Long length RJ45 cables are used to connect the IO cards in the expansion cabinet
to the CPU Card in the primary cabinet.
When mains-powered equipment is fitted into the expansion cabinet, an Expansion
Cabinet kit ELV Master Switch is required. This kit allows a mains supply to be
taken into the expansion cabinet and safely terminated.
When an LSLS is to be fitted into the expansion cabinet, an LSLS Expansion
Cabinet Kit is required. This kit includes a 20A lamp transformer, HPU, single LSLS
and LSLS Backplane. Additional LSLS cards and LSLS backplanes can then be
fitted up to a maximum of 3 LSLS cards in the Expansion Cabinet.
When moving parts to an expansion cabinet, just move what is necessary to
accommodate incoming cables. The following order is recommended to minimize
work:
1. Loop Detectors
2. I/O Cards
3. LSLS Cards
It is not necessary to have a separate Feeder Pillar for the expansion cabinet.
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