This document summarizes a seminar presented by EMS Radio Fire & Security on new technology. EMS has been in business since 1967 providing radio parts and later fire and security systems. They now employ 130 people in a 4,000 square meter facility. The seminar covered the EN54 wireless link standard for radio fire devices, key differences between this and the BS5839 standard, how EMS ensures quality factory production control, and applications of wireless fire technology such as for historic buildings, difficult installations, and temporary systems due to benefits like speed of installation and minimal disruption.

1. EMS Radio Fire & Security
New Technology Seminar Day
Thursday 3rd February 2011
© Copyright EMS Security Group Ltd.

2. Brief History of the EMS Group
 Founded in 1967 to provided specialised radio parts before
moving into the Fire and Security market in the 80s’.
 1998 System 5000 expanded to include Radio Networking.
 2001 Introduction of alkaline based wire-fire fire detection system
to reduce maintenance costs and cost of ownership, intelligent
networking and range extenders, voice evacuation and combined
sounder sensor product.
 Currently 130 people employed in a 4,000 m2 facility in Herne
Bay, Kent.
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3. EN54 part 25
The European Wireless Link
Standard

4. How is it applied to radio fire
devices?
Each radio fire device requires multiple
approvals.
For example:
 Smoke detector: EN 54 Parts 7 & 25, ETSI 300-220
 Heat detector: EN 54 Parts 5 & 25, ETSI 300-220
 Sounder: EN 54 Parts 3 & 25, ETSI 300-220
 Call Point: EN 54 Parts 11 & 25, ETSI 300-220
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5. Key differences – BS5839/Part25
 Periodic Call in reporting reduced.
Was 120 minutes Now 300 Seconds
 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 BS5839).
 Battery packs monitored every 15 minutes.
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6. Key differences – BS5839/Part25
+14 dB
Device at highest
+10 dB power level
+5 dB
0 dB
 Multi channel radio signalling. -5 dB
Device at lowest
power level
 Radio channel blocking.
-10 dB
-15 dB
 A fault is reported when both -20 dB
-25 dB
channels are blocked. -30 dB Total Available Device Signal
 Signal overhead EN54 -25
-35 dB
-40 dB
Immunity to site -45 dB
attenuation (path loss).
-50 dB
-55 dB
 In EN54 it states that a minimum -60 dB
signal reserve is required.
-65 dB
-70 dB
-75 dB
-80 dB
-85 dB
-90 dB Device Signal Level Non-EN54-25 Compliant
-95 dB
-100 dB
-105 dB
-110 dB RCC Background Level
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7. Factory Production
Control (FPC)
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8. How do we do it
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9. © Copyright EMS Security Group Ltd.

10. Applications
Wireless Link Devices

11. Application - Historic
 Hardwire was not a
consideration due to
the nature of the
building.
 Little or No disruption
caused during
installation.
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12. Applications
 Difficult installations.
 Sensitive sites.
 Temporary systems.
 Remote buildings.
 Time critical installations.
 Heritage buildings.
 Asbestos and other risk environments.
 Uneconomical installations for cable.
 Expanding wired systems.
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13. Benefits Of Wire-free / Radio Technology
 Speed of installation - Sensors can be fitted in
less than 10 minutes
 Minimal disruption to business/staff activities
 The fabric of the building is protected and
undamaged
 Temporary protection easily & quickly
implemented
 Extra devices are simply added - including
© Copyright EMS Security Group Ltd.

14. Thank You

15. EMS Radio Fire & Security
New Technology Seminar Day
Thursday 3rd February 2011
© Copyright EMS Security Group Ltd.