FyreLine EN54 Fixed Controller


Key Features

  • Supports two zones of up to 1000m
  • EN54-28:2016 approved
  • Provides accurate location of overheat event
  • Full fault monitoring
  • CE marked


The FyreLine EN54 Fixed Controller is a dual zone module that is capable of monitoring up to two zones of FyreLine EN54 Fixed Linear Heat Detection (LHD) Cable. The FyreLine EN54 Fixed Controller continuously monitors up to two zones of fixed LHD cable for a fault (open circuit) or an alarm (overheat or fire condition).

If an overheat or fire situation is triggered, the FyreLine EN54 Fixed Controller unit sends a signal of alarm to the fire alarm control panel and automatically calculates and displays the distance along the cable to the alarm point, giving the end user the exact location of the event.

Each zone can operate independently in interlock mode and a separate alarm and normally conducting fault output are provided for each zone. 

The unit is intended to be installed between the Fixed Linear Heat Detection cable and a conventional or addressable fire alarm control panel and has power, fault and alarm lights, as well as volt-free outputs for fault and alarm, corresponding to each zone.

The FyreLine EN54 Fixed Controller may also be connected to an industrial process control system using the two wire RS-485 Modbus RTU/ASCII output.

If a fault is detected, the corresponding fault output stops conducting, triggering a fault at the fire alarm control panel. The fault outputs also stop conducting on power loss to the unit or microprocessor fault, also triggering a fault at the fire alarm control panel.


Please ensure the entire turntable is visible on your screen in order for it to play.


EN54-28 is the European Standard for non-resettable line-type heat detectors that consist of a sensing element that uses electrical sensor cable. It specifies the requirements and performance criteria; and the corresponding test methods. This European Standard also covers non-resettable line-type heat detectors intended for use in the local protection of plant and equipment.

Please note: to comply with EN54-28, the FyreLine EN54 Fixed Controller, FyreLine FyreLine EN54 Fixed EOL and FyreLine EN54 Fixed LSZH LHD Cable must be used as a complete system.

All products in the FyreLine EN54 range are approved for use within the European Economic Area (EEA) and comply with the EU’s New Approach Directives and show the CE mark to indicate that they fulfill the requirements of relevant European product directives; meet all the requirements of the relevant recognised European harmonised performance and safety standards; and are fit for purpose and will not endanger lives or property.

Tech Specs

UL Model NumberFLDC-EN54
UL File NumberS36489
Dimensions (W x H x D)120mm x 180mm x 60.5mm (4.72” x 7.08” x 2.38”)
RatingNEMA 4, 4X (IP65)*1
FinishLight grey with clear lid
Display2 lines, 16 character back-lit display showing zone status
Power RequirementsAll circuits power limited if powered from a power limited supply
Operating Voltage12V DC, 24V DC 36V DC
Current Consumption Normal Operation (Standby) @ 12V<15mA
Current Consumption Normal Operation (Standby) @ 24V<7mA
Current Consumption Normal Operation (Standby) @ 36V<5mA
Current Consumption Alarm @ 12V<40mA
Current Consumption Alarm @ 24V<23mA 
Current Consumption Alarm @ 36V<15mA
Operating Temperature Range-20ºC to +50ºC (-4ºF to +122ºF)*2
Terminal Block Spacing5mm Rising Clamp
Terminal Block Rating16A
Wire Size0.08mm² (28AWG) to 4mm² (11AWG)
Supervised CircuitsPower, Input Zone 1 & Input Zone 2
InputsUp to two Class B zones of FyreLine EN54 Fixed LHD Cable
Max Zone Length1000m (3,280ft)
Min Zone Length1m (3,2ft)
End of Line Resistor3.6kohm (included)
Short Circuit Current0.5mA
Max Voltage5V
Communications OutputTwo wire RS-485 Modbus RTU/ASCII
Sounder2.4kHz 92dBa @ 10cm Buzzer
Alarm Output2x Form C volt-free relay contacts (resistive, common) Max V: 30V AC or 42.4V DC Max Current: 2A Max Switching Power: 60W, 62.5VA
Fault2x Optoisolated photo-transistor output (resistive, common) Max V: 35V DC Max Current: 80mA Max Power Dissipation: 150mW

*1 Outside the scope of EN54-28:2016, not verified by UL.
*2 Verified by UL to EN54-28:2016 Environmental Group II between -10°C to +55°C.



Eurofyre is a global provider of specialist fire detection and associated safety products for commercial and industrial applications. The systems we manufacture, supply and promote are designed to give users time to respond to possible threats before the loss of critical infrastructure, high-value assets, business and, most crucially, life. Eurofyre has designed, supplied, delivered, and provided comprehensive training on Linear Heat Detection systems for a huge variety of applications over the last fifteen years.

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