Wireless


 

 

 

Why use Wireless Fire Detection Systems?
What makes this technology extremely reliable?
What are the new EN54-25 regulations about?


This webpage is to introduce you to our new Wireless Product range and to ascertain a better understanding of the wireless technology.
You will also find relevant information about the new regulations in this regard and why it is now a solution you can specify with confidence for all new install and retrofit scenarios.

 

 

Part 25 the new standard for Wireless

 

 

EN54 part 25 is the new European standard for Fire detection and fire alarm system components using radio links

 

 

 


Key Differences 

The need to address signal strength and interference, as well as underlining the importance of a site survey according to manufacturer instructions.

And also:

• Periodic Call in reporting reduced to 5 minutes, before 120 minutes.

• Bi-direction communication to all devices
• Device LED control from the CIE
• Minimum battery life required
• Single power source is allowed in part 25
• Two power sources are still recommended in EN54 (as our devices have).
• Battery packs monitored every 15 minute

• Multi channel radio signalling.
• Fault reported when both channels are blocked.

 

 

                                      In EN54, it states that a minimum signal reserve is required. 

 
 

 

To meet EN54 (two independent power supplies for each detection device) it makes sense to have primary and secondary batteries working simultaneously

Primary supply to have a minimum 3 year life (EN Requirement)

30 day warning of impending failure

 

 

 

Compatibility

Below the two configurations available with our Wireless range:

- On the right is a traditional loop Wireless installation. This Hybrid solution enable you to connect wired  and Wireless devices on the same loop (up to 2 Hubs per loop)
- On the left is our brand new Wireless range with a unique hub  (in red) per loop connected to up to 31 clusters (RCC in green). Each cluster is connected with up to 31 devices. Up to 4 loops per panel so a maximum of 508 devices.

 

 

 

 


The possibilty to expand even more the systems

 

 

The topology of a Cluster (RCC) based system allows 4 hops across RCC’s to extend the range and coverage of the system

To further ensure integrity of the system, should any RCC lose communication, it will communicate back to the CIE by using another RCC 

 

 

 

Diversity Receivers

True diversity receivers allow greater reliability of system radio signalling within a building, where line of site is not possible by having dual antennas in different planes. Just having 2 aerials does not provide true diversity. It is the aerial plane itself that provides the improved functionality which is especially effective when using multiple channels in the same frequency band.

 

 

 

Typical multiple relay loop module (hub) site.  Any duplicated channels are best kept out of range of other devices and interfaces on the same channels.

 

 

Radio Survey

 

Each site will have varying levels of background noise


Under EN54:25 the minimum signal headroom must be checked for to ensure reliable communication. This is essential to ensure immunity against site attenuation

The survey kit automatically calculates the required headroom and then displays the results.
It may also be a requirement to log the background level for future reference