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Infinity ID2 2 Wire Fire Alarm System

  • Ability to wire in Radial or Loop modes (selectable on panel).
  • No need for end-of-line devices and ability to spur from any device.
  • Panel shows exact devices in fire/fault (e.g. “Main Office”, “Bedroom 1”, etc).

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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.


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.


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).


Video Transcript

“Hi, welcome to Discount Fire Supplies. Today, we’re going to be talking about 2-wire systems. Introducing the Infinity ID2 by Zeta Alarm Systems. What is a 2-wire system? A 2-wire system is a fire alarm system that allows you to wire your detectors, your manual call points and any warning devices on the same pair of wires. Traditionally, 2-wire systems are wired in radial circuits. Now introducing the Infinity ID2. The Infinity ID2 is available in 3 sizes: A 2, a 4, or an 8-zone. Also available with the system is a fully- functioning repeater. The repeater can be used in conjunction with any of the 3 sizes that previously mentioned. Where does the Infinity ID2 differ to all the other 2-wire systems out there? It’s the flexibility. The Infinity ID2 has the flexibility to be wired in either radial or in a loop circuit. This is convenient if you were to turn up to a job and you were replacing an existing fire alarm system, whether it be conventional or addressable; this would be a suitable replacement for either of those applications. You’re probably thinking, ‘How would you get over the sound circuits?’ Zeta have conveniently placed 2 conventional sound circuits within the panel purely for this purpose. Each of the zones is a Class E to hold up to 15 devices, with the exception of Zone 8, which can only hold up to 14, giving you a total of 119-device capacity on a full 8 system. Each device is specially-designed to be used in conjunction with Sound of Flash of base design by Zeta, with the intelligent and the identification for each device held within the base itself, allowing you to use conventional heads on top, driving the cost down. How do we identify these devices? Within the base, you will see a dill switch. These dill switches are used to address and identify each device. Usually, people find binary and dill switches quite daunting, whereas Zeta have cleverly come up with an application that is compatible with any Smartphone; on an Apple or Android format, which will aid you in doing so. Certainly, we will go into much more details about this and a video to follow this one. Each identification can be linked up with a 26-count of reference, which will be clearly displayed on the LCD screen on the front of the panel. This will allow you to name each device, for example, Bedroom 1. Therefore if any fire or fault, it’s easily indicated and located as quickly as possible. Another feature of the ID2 is alarm verification; perfect for houses of multiple occupancy. When you’ve got 5 different people living in a house, there may be many cases where there’s false alarms and you don’t necessarily want to evacuate the building all at once. Within the panel, you can program a delay timer from a minimum of 1 minute up to 3 minutes 45 seconds for you to verify that alarm before the system goes into full evacuation and clears the building. There are some complimentary devices available to work in conjunction with the Infinity ID2, such as a GSN communicator, TCP/IP module and also wireless devices. We’ll go into these devices in more detail in videos to follows. I’d like to thank you very much for listening to us today, and say that all of these products are available online at Thank you. We’ll see you again.”