Twinflex V3 Control Panel Engineering and Commissioning Manual
6
The Twinflex System
This system is an intelligent ‘2-wire’ system with conventional type cabling format, and is classed as an
‘Analogue non-addressable’ system due to the architecture used within the system design. All field devices
including sounders on a zone are connected via a common 2-core and screen fire rated cable, and
communicate with the control panel using the ‘Twinflex’ data protocol.
The Twinflex panel is able to recognise and separately indicate a detector alarm and a manual call point
alarm. The panel also monitors each zone for detector head removal, device fault, ‘End of line’ fault and
open or short circuit fault.
Every device has an inbuilt ‘End of line’ signal, which may be activated as required.
Do not use a resistor or capacitor or any other 3rd party ‘End of line’
module for ‘End of line’
.
The Twinflex control panel also provides a single conventional 24V sounder circuit, a monitored
conventional 24V relay circuit, a volt free common fire relay and a volt free common fault relay. There is
also a multifunction non-latching input, programmable with options such as ‘Class-Change’ and ‘Remote
fire input’.
The Twinflex control panel also incorporates an integral power supply unit and requires the following
standby batteries to provide up to 72 hour standby times (refer to Technical Data for further information).
2 or 4 zone panel 2 x 12v 2.1 Ah batteries
8 zone panel 2 x 12v 3.2 (or 3.3) Ah or 7.2 Ah batteries
Please note that the earlier version 1 of the control panel requires only one battery, so check the battery
labels in the control panel for clarification, as all the current version 3 control panels are labelled clearly
with ‘Battery 1’ and ‘Battery 2’.
Unlike most conventional fire alarm systems, which require separate pairs of cables for detector zones and
sounder circuits, the Twinflex system requires one 2-core and screen fire rated cable for each zone to
accommodate both detection devices and sounders. Furthermore sounders are incorporated within the
detector to reduce system components and simplify installation.
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