MAINS SUPPLY CONNECTION
The 240V AC mains connection should be taken from the landlord’s supply and terminated via an un-switched fused
spur with neon alongside the controller. The typical power requirement for a standard 32-way Advent XT2 system is
15 Watts.
Connect the Advent XT2 controller to the fused spur using the 3-core flex and IEC socket provided. Secure the flex to
the chassis using a cable tie to prevent the mains lead being inadvertently unplugged. The spur should be fitted with a
5A fuse. If the flex is replaced always ensure the ferrite core is re-fitted as close as possible to the IEC socket.
27V SMPSU MODULE
The Advent XT2 controller includes a 27V/150W (5.6A) switched mode power supply unit with solid state over-load,
over-voltage and over-temperature protection. With the mains connected the green Supply Healthy LED should be
illuminated. The output voltage is factory set to 27.5V DC with the batteries disconnected using a DVM across V+/V-.
BATTERY STANDBY
In the event of a mains failure, two 12V 5Ah rechargeable batteries will maintain a typical
system for approx. 12 hours. A protection circuit will disconnect the battery supply in the
event of prolonged mains failure to prevent damage to the batteries. The mains supply
must be applied first to energise the protection circuit, i.e. the system will not function
by simply connecting the batteries alone. An optional external battery box is available
to extend the battery standby time to 24 hours – see section 13.
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