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Twin Wire Fire Alarms 2017-07-27T13:10:48+00:00

Alarmsense Two Wire

Most conventional fire systems are designed to work with two pairs of wires per zone: one pair for detection devices such as smoke detectors, heat detectors and manual call points; the other for alarm devices such as bells, sounders or strobes. By using different voltage bands for quiescent and alarm states, AlarmSense® components can be connected to the same pair of supply wires.

When powered and controlled by the AlarmSense® two-wire fire panel, this reliable technology takes all the complexity out of fire alarm system design, leading to quicker, less expensive and more flexible installation. Research shows an AlarmSense® two-wire system can achieve up to 40% reduction of labour over a standard four wire conventional system.

Features

  • Designed to comply with EN54 parts 2 and 4
  • Installer-friendly design accommodates easy first fix and straightforward maintenance
  • Attractive flush or surface mountable plastic lid and enclosure
  • Auxiliary remote, fire, fault and reset outputs
  • ‘Class change’ and alert inputs
  • Four conventional sounder circuits (for use with non-AlarmSense® sounders)
  • Low quiescent current – for extended standby times with small batteries.
  • Intuitive user-friendly interface.
  • Multiple indicators provide a comprehensive overview of system status.
  • Push button access code or keyswitch entry (dependent on model purchased) to a wide range of Engineering functions, including:
    • Selectable zone delay facility
    • Zone test facility
    • Coincidence (double-knock) facility
    • Non-latching zones facility
    • Comprehensive fault diagnostic facilities

System expansion connections for up to eight two-wire repeater panels and a range of Relay Output Cards

The AlarmSense® range comprises:

  • Optical smoke detector
  • Integrating optical smoke detector
  • Two heat detectors
  • Mounting base
  • Manual call point
  • Sounder base
  • Sounder beacon base
  • Alarm relay module

The sounder base is capable of local and general alarms while the sounder beacon base enables compliance with the Disability Discrimination Act (DDA).

The entire range has been designed to enable compliance with BS 5839 Parts 1 and 6, EN54-5 and 7 for heat and smoke detectors, EN54-3 for the sounder base and sounder beacon base while the alarm relay complies with EN54-18.

AlarmSense® sounders and manual call points are fitted to the same zone as detectors. In quiescent state the zone is powered at between 9 and 15 volts, nominally 12 volts, at which voltage only detectors and call points operate. Sounders require 24V to operate.

When an alarm is detected on a particular zone, the control panel increases the line voltage to 24V on that zone, causing the sounders to produce a continuous ‘Evacuate’ sound. Any voltage-sensitive output devices- relay modules or other alarm devices-also operate.

When the voltage is increased to 24V, the detector alarm current will reduce to 1.5mA. The detectors are latched in alarm until they are reset by reducing the voltage to less than 2V for greater than 1 second. Output devices will de-activate each time the voltage is reduced to 12V unless otherwise stated in their specification.

On other zones, where detectors have not changed to the alarmstate, generation of the ‘Alert’ tone can be achieved by pulsing the supply voltage from 12V to 24V with Line 1 positive and the sounders configured to continuous output. Pulse frequency is determined by the control panel but a frequency of 1 second on, 1 second off, is recommended for compliance with BS 5839 Pt1.

CODE                     DESCRIPTION

CHAS/2                         AlarmSense 2 zone control panel

CHAS/4                         AlarmSense 4 zone control panel

CHAS/8                         AlarmSense 8 zone control panel

CHBG/S/AS                  AlarmSense break glass unit (surface mounted)

CHSM/P/AS                 AlarmSense optical smoke detector c/w base

CHHF/AS                      AlarmSense fixed temperature heat detector (60°) c/w base

CHHR/A/AS                 AlarmSense rate of rise heat detector c/w base

CHWB/D/AS                AlarmSense Base mounted electronic sounder (87-70db) 5mA

CHWB/D/BN/AS         AlarmSense Base mounted electronic sounder/beacon (87-70db) 5mA

CHRL/AS                 AlarmSense zone powered relay (resets on silence) 2 x 1A 30v rated contacts

TwinFlex

The Twinflex conventional fire alarm system incorporating the Multipoint combined smoke and heat detector and built-in sounder means the whole system can be installed using only one pair of wires. Designed to meet European Standards, the system is EN54 Part 2 compliant. Available in 2,4 or 8 zone format, the panel controls all detectors, call points and sounders within each zone from only a 2 core cable.

Features

  • 2 wire system combines all devices within a zone.
  • Separate sounder circuits not required.
  • EN54 Pt. 2 compliant.
  • Savings can be as high as 40%.
  • Semi addressable.
  • Class change facility.
  • Multi-functional smoke/heat detector with sounder.
  • Quick and easy installation, one person test.
  • Detectors self-calibrate every 6 hours.
  • Up to 32 devices per zone.
  • Auxiliary sounder output on panel.

TwinFlex Plus

Based on the 2-wire Twinflex system, the revolutionary Twinflex plus incorporates “Checkpoint” technology to eliminate the problem of nuisance alarms.

  • Two wire installation plus all the features of the standard Twinflex system.
  • Programmable (1-5 minute) automatic detector alarm confirmation in dwelling zones.
  • Local sounder operates while detector alarm is confirmed.
  • Full alarm when detector alarm confirmed.
  • Immediate full alarm when fire detected in communal areas.
  • Multipoint detector offers 7 modes of detection.
  • Built-in sounder with 92dBA output.
  • All devices have built-in EOL monitoring.
  • Callpoint identification.
  • EN54 compliant.
  • Eliminates disruption of nuisance alarms.
  • Perfect solution for BS5839 pt 6 (HMO’s).
  • No need for mixed systems.

TwinFlex Quantum

The major feature of Twinflex Quantum is the ability to set a pre-alarm in individual rooms, but at the same time instigate full alarm should fire be detected in any communal area. This is possible via a technological breakthrough in conventional systems known as “detector sounder logical link”.

Features

  • Quick, easy installation.
  • 4 zone and 8 zone variants.
  • Detectors self calibrate every 6 hours.
  • Intelligent 2 wire system.
  • Designed for Houses of Multiple Occupancy (HMOs).
  • Detectors, break glass units and sounders on the same 2 core.
  • 2 variants, BS5839 part 6 or EN54-2 & 4.
  • Multi criteria detectors including 7 detection modes.
  • Combined detector sounders.
  • Pre alarm facility for individual rooms.
  • True, 2 stage alarm facility.
  • Flexible programming allows variable alarm confirmation period of 1-8 minutes.
  • No nuisance alarm.

Fire zones are designated “dwelling” or “communal” detectors in dwelling zones are enabled with the logical link feature, this allows the control panel to be programmed with a variable time confirmation of 1-8 minutes, at one minute increments. A fire in a dwelling will result in the alarm sounding locally, the panel conducts its checks and will confirm the fire is genuine, if it is all sounders will be activated, if it is not the panel will automatically reset the detector/sounder and revert to its normal state. Detectors sensing fire in communal areas instantly generate a full alarm throughout the building.

Twinflex Quantum operating environments

Communal Zone

Communal area, e.g. hall/stairway; kitchen; TV lounge. When a detector alarm is detected on this type of zone, the control panel enters the fire state and the alarms are activated throughout the installation.

Single Dwelling Per Zone

Dwelling requiring more than one detector/ sounder, e.g. apartment/flat. When a detector alarm is detected on this type of zone, all detectors/sounders on the zone are activated and then the control panel carries out the configured number of confirmation checks. If the detector alarm is confirmed, the control panel enters the fire state and the alarms are activated throughout the installation; if the detector alarm is rejected, the detector/sounders on the zone are silenced.

Multiple Dwellings Per Zone

Dwelling requiring a single detector/sounder, e.g. hostel; hall of residence; hotel rooms; bedsits. When a detector alarm is detected on this type of zone, the detectors/sounder that generated the alarm signal is activated and then the control panel carries out the configured number of confirmation checks. If the detector alarm is confirmed, the control panel enters the fire state and the alarms are activated throughout the installation; if the detector alarm is rejected, the detector/sounders on the zone are silenced.

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