Planning The Wiring - C-TEC QT606A Manual

PLANNING THE WIRING

Quantec can be compared to an analogue addressable fire alarm system where the integrity
of the wiring is of paramount importance. However, with Quantec, a 'star' rather than a
'loop' wiring scheme is used.
In order to allow the use of ordinary unscreened cables and reduce the risk of volt drop, the
only method of wiring Quantec we recommend involves the use of 'network splitters' (QT603).
Network splitters have six fused 'limbs' for the wiring of individual sections of the system
and they provide a convenient way of wiring, testing and protecting the system. In
addition to simplifying the wiring and reducing volt drop, their fault and power LEDs also
help find installation faults.
Each splitter has one input and one output network connection (both unfused) and six
'limb' outputs that are fused. The unfused connections are for the connection of the
network 'Spine' which should normally be wired in at least 1mm
networked devices should be connected to the spine except network splitters. The fused
outputs i.e.'Limbs' are for the connection of individual circuits containing networked
devices. These should be wired in four or six core security cable. In excess of 60 addressable
devices can be connected to each network splitter. Consequently four splitters are capable
of accommodating an entire system. However, for larger systems and for convenience it is
likely that more will be used.
As network devices are 'soft addressed' after installation no consideration need be made as
to how different network devices will interact with each other. Within rooms, however,
ancillary devices must be connected to a call point and it is simplest to loop in and out of
slave overdoor lights (if fitted). If slave overdoor lights are not fitted, loop in and out of
call points. The diagrams below show how this should be done in nursing home-type
applications, but the same applies to other buildings too.
DEVICE WIRING
WHEN SLAVE
OVERDOOR LIGHTS
ARE USED
DEVICE WIRING
WHEN SLAVE
OVERDOOR LIGHTS
ARE NOT USED
Comprehensive details on how to wire Quantec appear in our Quantec Wiring Instructions
(doc. no. DNUQ171717). Please ensure your contractor obtains a copy and reads it carefully before
work commences. Pre-Commissioning Instructions are also available (doc. no. DNUQ1818PRE).
4
SLAVE
OVERDOOR
LIGHT
2
2
2
2
Approved Document No: DNSQ100101 Rev 6 • Page 12 of 16
2 cable (e.g. T&E). No other
4
CALL
POINT
4
CALL
POINT
CEILING
PULL
CEILING
PULL