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Home Fire Alarms Wired Fire Alarm Systems 2 Wire Fire Alarm Systems

2 Wire Fire Alarm Systems

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    Test Product – Infinity Kit Builder

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    Infinity ID2

    Infinity ID2 System Configurator

    Build a complete Infinity ID2 system by selecting the required components below. Compatible items only. Alternatively, choose only the components...

    Open Configurator
  • Infinity ID2 2

    Infinity ID2 2, 4, or 8 Zone Fire Alarm Kit
    • Intelligent device identification on 2-wire system
    • Built-in sounders and flashers on all detectors
    • No end-of-line devices required
    SKU: a413a4332ed3
  • Fike TwinflexPro2 2

    Fike TwinflexPro2 2, 4 or 8 Zone Fire Alarm Kit
    • TwinflexPro2 contractor kit available with 2, 4 or 8 zone panel
    • Cost effective starting point for your Twinflex system
    SKU: 7007c733d51f
  • Infinity ID2 2-8 Zone Fire Alarm Panel

    Infinity ID2 2-8 Zone Fire Alarm Panel
    • Ability to wire in Radial or Loop modes (selectable on panel)
    • Panel shows exact device in fire, "Bedroom 1", "Main Office", etc.
    • Verify alarms to reduce false alarms
    SKU: 0a5028c2cc56
  • Fike Twinflex Pro 2

    Fike Twinflex Pro 2, 4 or 8 Zone Fire Alarm Panel
    • 2 wire system (detectors, sounders & call points wired on the same zone wiring)
    • Available in 2, 4 or 8 zone version (4 zone can be expanded to 8)
    • LCD display allowing zones to be labeled (“Ground Floor”, “1st Floor”, etc)
    SKU: 64896c4de303
  • C-Tec CFP AlarmSense 2

    C-Tec CFP AlarmSense 2, 4 or 8 Zone Panel
    • Apollo AlarmSense panel
    • Available 2, 4 or 8 zones
    • Wide range of engineering functions including zone test, coincidence, zone delay and non-latching zones
    SKU: 6b338305e44c
  • Kentec Sigma CP-A AlarmSense 2

    Kentec Sigma CP-A AlarmSense 2, 4 or 8 Zone Panel
    • Apollo AlarmSense 2-wire control panel
    • Available in 2, 4 or 8 zone sizes
    • Available in Surface or Flush Mounting Options
    • Auxillary power supply
    SKU: 1f96b26bef07
  • Haes 2 or 4 Zone AlarmSense Fire Panel

    Haes 2 or 4 Zone AlarmSense Fire Panel
    • 2 or 4 AlarmSense zones
    • Cable & labour saving Two-Wire technology
    • Approved to EN54-2 & 4
    SKU: HAES-ALARMSENSE-PANEL
  • Haes 4-12 Zone AlarmSense Plus Fire Panel

    Haes 4-12 Zone AlarmSense Plus Fire Panel
    • 4-12 AlarmSense zones
    • Cable & labour saving Two-Wire technology
    • Plus panel with larger enclosure, battery capacity & power supply
    SKU: HAES-ALARMSENSE-PLUS-PANEL
  • Eaton Bi-Wire Flexi Fire Alarm Panel (Conventional or Bi-Wire Selectable Zones)

    Eaton Flexi BiWire or Conventional Panel
    • Configure zone wiring to work as either a conventional or two-wire system
    • Allows the connection of an existing conventional system to a BiWire system
    • Compatible with two-wire and conventional EN 54-23 certi ed visual alarm devices (VADs)
    SKU: dad7139b944e
  • Infinity ID2 Repeater Panel

    Infinity ID2 Repeater Panel
    • Can be programmed to act as fully functional (ability to silence/reset) or passive (shows alarm info only)
    • 4 cores required from ID2 panel (2 data + 2 power)
    • Can powered from 24V auxiliary PSU in the ID2 panel
    SKU: f3ff14656d39
  • Fike Twinflex Pro2 Repeater Panel

    Fike Twinflex Pro2 Repeater Panel
    • Compatible with the 4 or 8 zone Twinflex Pro2 panels only
    • Reports Twinflex Pro panel events to a remote location
    • Capable of performing system controls (i.e. Silence Alarms, Reset, Sound Alarms & Silence Buzzer)

    In Stock

    £145.38 (inc VAT: £174.46)
    SKU: 505-0010
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  • Infinity ID2 Detector With Optional Integral Sounder

    Infinity ID2 Detector With Optional Integral Sounder
    • 4 types of detector available
    • All available with optional integral sounder
    • Remote LED output
    SKU: ad50a1828670
  • Black Infinity ID2 Detector With Optional Integral Sounder

    Black Infinity ID2 Detector With Optional Integral Sounder
    • Black plastic moulding to meet aesthetical requirements
    • All available with optional integral sounder
    • 4 types of detector available
    SKU: 167244dee92b
  • Twinflex ASD Multi-Function Detector With Optional Sounder And Strobe

    Twinflex ASD Multi-Function Detector With Optional Sounder And Strobe
    • Available as detector only, with sounder or with sounder/strobe
    • 6 selectable modes of detection
    • Inbuilt selectable end of line
    SKU: 6a803010d2ef
  • Twinflex ASD Detector with Optional Sounder in Black

    Twinflex ASD Detector with Optional Sounder in Black
    • Twinflex ASD detector in black plastic moulding
    • Available as detector only or with integral sounder
    • 6 selectable modes of detection
    SKU: 7e6936dc903d
  • AlarmSense Optical Smoke Detector

    AlarmSense Optical Smoke Detector
    • Responds well to slow-burning, smouldering fires
    • Well suited for bedrooms and escape routes
    SKU: 9b0419552c28
  • AlarmSense AlarmSense Heat Detector

    AlarmSense AlarmSense Heat Detector
    • Can be used for applications where smoke detectors are unsuitable
    • Two types available; fixed heat (CS) or rate-of-rise (A1R)
    SKU: 74d25688c061
  • Apollo Alarmsense Integrating Optical Smoke Detector

    Apollo Alarmsense Integrating Optical Smoke Detector
    • Responds Well to Slow Burining Smouldering Fires
    • 360 Degree Visibility of LED's
    • Reduces False Alarms
    • Quick Simple Installation
    SKU: 75b3db4ae556
  • Eaton BiWire Ultra 5 in 1 Detector

    Eaton BiWire Ultra 5 in 1 Detector
    • DIL-Switch Mode Selection
    • Non-Latching Mode for HMO Use
    • 15m Optical Range
    • 2 Core Wiring

    In Stock

    £14.39 (inc VAT: £17.27)
    SKU: EFBW5IN1DET
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  • AlarmSense Alarm Relay

    AlarmSense Alarm Relay
    • Enables devices such as visual indicators, pillow/bed alarms and radio vibrating or paging devices to be connected to AlarmSense system
    • Ensures DDA compliance

    In Stock

    £26.11 (inc VAT: £31.33)
    SKU: 55000-835
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  • AlarmSense Base

    AlarmSense Base
    • Standard AlarmSense base
    • Detects the removal of a detector head and reports a fault

    In Stock

    £4.06 (inc VAT: £4.87)
    SKU: 45681-244
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  • AlarmSense Open-Area Sounder

    AlarmSense Open-Area Sounder
    • IP65 rated
    • Apollo tone - synchronised with AlarmSense sounders and sounder visual indicator bases

    In Stock

    £34.17 (inc VAT: £41.00)
    SKU: 55000-018
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  • AlarmSense Open-Area Sounder Visual Indicator

    AlarmSense Open-Area Sounder Visual Indicator
    • Synchronised flashing red LED on sounder visual indicators and visual indicators
    • IP65 rated
    • Apollo tone - synchronised with AlarmSense sounders and sounder visual indicator bases

    In Stock

    £42.23 (inc VAT: £50.68)
    SKU: 55000-017
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  • AlarmSense Sounder Base

    AlarmSense Sounder Base
    • Compatable with complete range of AlarmSense detectors
    • High and low volume ranges

    In Stock

    £18.10 (inc VAT: £21.72)
    SKU: 45681-510
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  • AlarmSense Sounder Visual Indicators Base

    AlarmSense Sounder Visual Indicators Base
    • Audio and flasher base
    • Sounder range between 70dB(A) and 87dB(A)

    In Stock

    £26.00 (inc VAT: £31.20)
    SKU: 45681-509
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  • Apollo AlarmSense Manual Call Point

    Apollo AlarmSense Manual Call Point
    • Resettable operating element.
    • Easy access, front reset mechanism.
    • Suitable for semi-flush or surface mounting.

    Low Stock

    £15.51 (inc VAT: £18.61)
    SKU: 55400-894
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  • Apollo MiniDisc Remote Indicator

    Apollo MiniDisc Remote Indicator
    • Small and discrete remote indicator
    • Compatable with with Apollo XP95, AlarmSense or Series 65 detectors

    In Stock

    £4.36 (inc VAT: £5.23)
    SKU: 53832-070
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  • Infinity ID2 Manual Call Point

    Infinity ID2 Manual Call Point
    • Manual call point for the Infinity ID2 system
    • Indoor or outdoor (IP67) version available
    • Visible warning flag confirms activation
    SKU: 2d4bb188e388
  • Xtratone MKII Addressable Sounder in Red or White

    Xtratone MKII Addressable Sounder
    • Indoor MKII addressable sounder compatible with Zeta control panels
    • 102dB @ 1m sound output
    • Available in Red or White
    £36.28
    SKU: 449742fad07c
  • Xtratone MKII Addressable Sounder & Wall VAD

    Xtratone MKII Addressable Sounder & Wall VAD
    • Combined sounder and VAD in single unit
    • 100dB sound output at 1 metre
    • Hard or soft addressable capability
    £45.47
    SKU: 433d08f88bb8
  • Raptor MKII Addressable Weatherproof Sounder in Red or White

    Raptor MKII Addressable Weatherproof Sounder
    • IP65 weatherproof sounder
    • 16 Tone patterns (site selectable)
    • Available in red or white
    £39.34
    SKU: 8bc9c698c15a
  • Raptor MKII Addressable Weatherproof Combined Sounder & Beacon in Red or White

    Raptor MKII Addressable Weatherproof Sounder & Beacon
    • IP65 weatherproof sounder/beacon
    • Flashing rate 0.33Hz - 1.5Hz
    • Available in red or white
    £48.03
    SKU: e5f3c05492bd
  • Fike Twinflex Sounder

    Fike Twinflex Sounder
    • 2-wire zone powered operation
    • IP65 weatherproof protection
    • EN54-3 certified compliance

    In Stock

    £41.52 (inc VAT: £49.82)
    SKU: F0296337
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  • Fike Twinflex Wall Sounder & VAD

    Fike Twinflex Wall Sounder & VAD
    • 2-wire powered sounder and VAD combination
    • IP65 rated weatherproof design
    • DIP switch programmable operation

    In Stock

    £61.42 (inc VAT: £73.70)
    SKU: F0296336
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  • Eaton BiWire Ultra Base Sounder with Optional VAD Flasher

    Eaton BiWire Ultra Base Sounder with Optional VAD Flasher
    • Available with Optional VAD Flahser
    • Certified to EN54-3 & EN54-23
    • Can be Used Stand Alone
    • For Use with 5-1 muli-sensor Detector
    SKU: 4ad3a1f641a8
  • Eaton BiWire Ultra External Relay 24V Or 230V

    Eaton BiWire Ultra External Relay 24V or 230V
    • 24Vdc or 230V ac rekay for Eaton Ultra BiWire system.
    • IP40 Rated.
    • Easy to fit.
    SKU: 0d6df736aef7
  • Eaton BiWire Ultra Manual Call Point

    Eaton BiWire Ultra Manual Call Point
    • Robust Construction
    • Fast Fit Clip on Front Cover
    • IP22 and IP66 Options
    • Compatible with BiWire Accessories
    SKU: 6ee3c32a781f
  • Eaton EF009 BiWire Ultra Wall Sounder

    Eaton EF009 BiWire Ultra Wall Sounder
    • Wall sounder for BiWire Ultra system
    • High sound output and durable design.
    • Ideal for high noise environments
    • Suitable for open areas

    In Stock

    £22.17 (inc VAT: £26.60)
    SKU: EF009
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  • Eaton BiWire Ultra Wall Sounder & VAD

    Eaton BiWire Ultra Wall Sounder & VAD
    • Certified to EN54-3 and EN54-23
    • High sound output with durable design
    • Weatherproof option available

    In Stock

    £28.92 (inc VAT: £34.70)
    SKU: EF009SB
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  • Eaton BiWire Ultra Wall Sounder with Optional VAD Flasher

    Eaton BiWire Ultra Weatherproof Wall Sounder & Optional VAD
    • Certified to EN054-3
    • Weatherproof
    • 3 Selectable Tones
    SKU: 3dce51f1d622
  • Fike Twinflex Manual Call Point With Optional Cover

    Fike Twinflex Manual Call Point With Optional Cover
    • Resettable front element
    • Indoor and outdoor versions available
    • Inbuilt selectable end of line
    SKU: b5013be896b9
  • Fike 600-0092 Remote LED Indicator

    Fike 600-0092 Remote LED Indicator

    In Stock

    £10.06 (inc VAT: £12.07)
    SKU: 600-0092
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  • Fike Twinflex Input Output (I/O) Module

    Fike Twinflex Input Output (I/O) Module
    • Provides an interface between ancillary equipment and Twinflex zone
    • Zone powered
    • Mains rated relay contacts

    In Stock

    £48.49 (inc VAT: £58.19)
    SKU: 802-0006
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  • Fike Twinflex Flashpoint

    Fike Twinflex Flashpoint
    • Two versions available
    • 90dBa maximum output
    • Three selectable sound patterns
    SKU: 45f3d33e6620
  • Fike Twinflex Hatari Sounder in Red or White

    Fike Twinflex Hatari Sounder
    • Configurable sounder output level
    • 100dBa maximum output
    • Available in red or white
    £19.20
    SKU: b56f1b1f043f
  • Fike Twinflex Hi Point

    Fike Twinflex Hi Point
    • 90dBa maximum output
    • Three selectable sound patterns
    • Inbuilt selectable end of line

    In Stock

    £32.53 (inc VAT: £39.04)
    SKU: 302-0004
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  • Fike Twinflex SoundPoint in Red or White

    Fike Twinflex SoundPoint
    • 85dBa maximum output
    • Three selectable sounder tones
    • Available in red or white
    £19.20
    SKU: 266573ba07bc
  • Fike Twinflex Weatherproof Flashpoint

    Fike Twinflex Weatherproof Flashpoint
    • LED visual indication beacon
    • IP52 rating
    • Inbuilt selectable end of line

    Low Stock

    £42.18 (inc VAT: £50.62)
    SKU: 302-0023
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  • Zeta Addressable Input/Output Module (Mains & Low Voltage)

    Zeta MKII Addressable Input/Output Module
    • Loop powered
    • Equipped with short circuit line isolator
    • Hand addressed using the 8 way dip switch OR softly addressed using the handheld MKII Programmer
    SKU: d07bcb48171e

2-wire fire alarm systems are a type of conventional fire alarm system where all devices, such as smoke detectors, manual call points, and sounders, are connected using the same pair of two-core cables per zone. This means you don’t need separate wires for sounders, unlike traditional systems, which can save on cabling and installation time.

Read more

These systems are often chosen for smaller buildings or projects with budget constraints because they lower costs and speed up installation. They’re also flexible, with some offering features like alarm verification to reduce false alarms, which is an unexpected benefit for ensuring safety without unnecessary evacuations.

Infinity ID2

The Infinity ID2 is widely recognised as the leading 2-wire fire alarm system. It is the only system of this type to offer truly intelligent features such as identifying the exact device in fire or fault, removing the need for pesky end-of-line devices and flexible wiring (choice of wiring formats including the ability to spur). If you still need convincing, check out our Infinity ID2 vs other 2-wire fire systems breakdown.

What is the Infinity ID2

Zeta Alarm Systems is proud to introduce the most advanced 2 wire system on the market. We can now provide a system that gives all of the benefits associated with a ‘2 Wire’ installation (less cable, quicker installation, cost savings on labour/product) and has the facility to ‘I.D.’ the devices. The system is built on the proven communication protocol developed by Zeta Alarm Systems and shares the same platform as our largest, most powerful system. The Infinity ID2 can be used for new installations, as a retro-fit for any conventional system or as a replacement for existing 2 wire systems when the extra features are deemed to be desirable/necessary. This is possible because the Infinity ID2 devices sit on radial circuits, thus making it easy to ‘upgrade’ a system with the facility to I.D. devices without the need to re- wire.

Standards


The Infinity ID2 fire alarm system has been designed to meet the full requirements of BSEN5839 part 1 and BSEN5839 part 6.The control panel has been designed to meet EN54 part 2 and EN54 part 4.

Cabling


A single pair of wires is used from each zone terminal (radial circuit) which connects all detectors, call points, warning devices (sounders/ flashers) and interfaces. There is no requirement for an ‘End of line’ device. This will save a significant amount on the cost of traditional conventional or addressable systems (around 40% or more in the majority of cases).

Cable Break Protection


In the event of a cable break, the panel will report the break. The devices after the break will be lost, but will be listed one-by-one on the panel display to help locate the break.

Special Detector Bases


Our bases all come with both sounder and LED flasher as standard. This makes our system the only system available today with a sounder and flasher with every detector, improving the audibility and visual identification of an alarm.

Alarm, Fault & System History


The Infinity ID2 includes a 2048 event history that stores all alarm, fault and system events.

System Monitoring


Since every device is monitored constantly and communicates with the panel at a maximum interval of 4 seconds, any malfunction in any device will be reported by the panel. This of course will include the exact location of the device.

Cable Short Circuit Protection


Each zone is equipped with a short circuit isolator built-in to the panel, so any short circuit, no matter how severe, will not affect the electronics in the control panel.

Alarm Indication


Each device can be uniquely identified (I.D.) by the panel and a 20 character label set for each. In the event of a fire or fault the exact device that triggered the event will be shown.

Installation & Commissioning


In addition to the benefits already listed, once the panel has been connected a ‘Device Count Verification’ feature will confirm the number and type of every device. This can then be checked against the system specification.

Alarm Verification


Each smoke detector can be simply programmed to verify an alarm before a full evacuation. This gives the benefit of being able to operate an individual detector’s sounder/ flasher base and have a time period to clear the smoke/verify the alarm. This makes the Infinity ID2 perfect for HMO installations.

Zone Check – Cable Integrity & Zone Identification Facility


Our Zone Check facility allows you to illuminate the LEDs and flash the LED flashers of all devices contained within a zone. This has many benefits including identifying the location of a zone if you are visiting an installation for the first time and also checking the cable runs to all devices that should be contained in a zone. (It is also possible to narrow this down to an individual device if required).

Fike Twinflex

The Fike TWINFLEXpro² is an advanced two-wire fire alarm system designed for efficient installation and versatile application. By integrating the Multipoint ASD combined smoke and heat detector, which includes optional built-in sounder and strobe, the system allows all devices within a zone to operate over a single pair of wires. This streamlined approach reduces installation time and complexity.

Key features

  • Multipoint ASD Detector: Offers seven modes of detection—three smoke settings, two fixed temperature heat settings, one rate-of-rise heat setting, and a combined smoke/heat mode. This flexibility ensures suitability across various environments and can be easily configured during commissioning.
  • Integrated Sounder and Strobe: The detector can be equipped with a 90 dBA sounder and strobe, eliminating the need for separate alarm devices and further simplifying installation.
  • Device Capacity: Supports up to 32 devices per zone, accommodating a range of detectors, call points, and sounder beacons on the same two-wire circuit.
  • Advanced Monitoring: Features individual fault monitoring displays for each zone, enhancing system reliability and maintenance efficiency.
  • Flexible Configuration: Zones can be set up without the need for additional resistors or capacitors, and the system can distinguish between call point and detector alarms.
  • Input/Output Module: An optional module can be added anywhere on the zone circuit, providing interfaces for functions like plant shutdowns or door release mechanisms.
  • Repeater Panels: Up to eight repeater panels can be connected to a single control panel via an RS485 data link, offering remote display and control capabilities at multiple locations within a building.

The TWINFLEXpro² system also incorporates Checkpoint Alarm Confirmation Technology, which helps reduce false alarms by verifying potential threats before initiating a full evacuation. This feature is particularly beneficial in residential settings, such as apartments and dormitories, where false alarms can cause significant disruption.

Overall, the Fike TWINFLEXpro² provides a reliable, cost-effective, and user-friendly fire detection solution suitable for a wide range of applications.

Apollo AlarmSense

The Apollo AlarmSense system is designed for simplicity and efficiency, making it a popular choice for smaller installations. It’s a conventional fire alarm system where all devices share the same pair of wires, which can save on cabling and speed up setup. This is especially useful for buildings like shops, offices, or residential properties, where budget and space are considerations.

This system isn’t just about cost; it also includes unexpected features like technologies to reduce false alarms and ensure the system works reliably. It also supports accessibility with products like beacons, which help meet DDA requirements for people with hearing or visual impairments.

It’s particularly suited for small to medium-sized buildings, and its flexibility means you can easily add to it later if needed, which is great for growing businesses or changing building uses.

Eaton BiWire Flexi

The Eaton BiWire Flexi system is a versatile fire alarm solution that integrates two-wire and conventional technologies, allowing each zone to be configured for either type of device. This flexibility makes it ideal for building extensions, retrofitting, or new constructions, especially where cost and time efficiency are crucial.

It reduces cabling needs by up to 50%, potentially saving significant costs, and cuts installation time by about a third. The system includes user-friendly features like fault-finding for wiring issues and a self-test mode to ensure detectors are working, which is an unexpected detail for enhancing maintenance ease.

It’s well-suited for small to medium-sized buildings like shops and offices, and is particularly useful for projects needing to integrate with existing systems or expand them without major overhauls.

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