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Fire detection systems

BiWire Flexi two-wire or conventional fire alarm panel

The BiWire Flexi panel combines two technologies to provide a truly versatile fire safety solution.

The panel can be configured to allow either two-wire or conventional devices to work on a zone. Each zone is individually configurable so a mixture of types can therefore be installed on the same system. This provides you with the flexibility to utilise all the time-saving benefits of a two-wire system with the ability to use a wide range of conventional devices, where required. 

It shares the same straightforward, intuitive interface as the 8 Zone conventional panel, providing a proven solution for simple programming and maintenance. The BiWire Flexi fire alarm system is certified to EN54 parts 2 and 4 and is designed to meet the recommendations of BS 5839. 

Flexible
Easy to extend existing conventional systems
Competitive
Two-wire system can reduce cabling by up to 50%
Fast
Typical system installation time can be reduced by a third

Your simpler, cheaper, more versatile choice for new and existing fire alarm system installations

Whether you are fitting out a building extension, retrofitting an outdated system with limited knowledge of the original installation or looking to benefit from the cost and time benefits of two-wire technology on a new build and still want to utilise conventional devices; BiWire Flexi gives you the power to adapt the system to the site. Projects change, your panel doesn't have to.

Conventional fire system compared to a BiWire Flexi fire system
Difference between a typical 4 wire conventional and a BiWire Flexi fire alarm system installation.

Installing a fire system extension as part of wider building work?

Two-wire (2-wire) fire alarm systems can often be overlooked when selecting additional devices or panels for building extensions; the cabling and devices are already in place and it can be perceived as expensive to replace them. The problem this creates is that any additional conventional devices added can be costly and require unnecessary additional cabling. BiWire Flexi provides the best of both worlds: new cost-effective 2-wire devices without replacing existing devices and a panel that works with both.

Simple to install, easy to find a fault

A handy fault-finding feature helps you locate problems relating to both open circuit wiring or removed detectors. The installation manual also shows how to put the panel into ‘self-test mode’ so that all detectors flash amber to indicate there is power to the devices and that they’re properly clipped in.

Be less conventional with Eaton's range of two-wire fire alarm devices

From the world's leading supplier of fire notification devices, Eaton's range of 2-wire fire alarm devices helps you to maximise the BiWire Flexi system. From our 5 in 1 detector to our VAD compliant sounder beacon base, each device has been chosen specifically to be part of the BiWire Ultra device range for their quality, ease of use and low installation cost.
Specifications
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Product codes

2 Zone BiWire Flexi panel EFBW2FLEXI  
4 Zone BiWire Flexi panel EFBW4FLEXI  
8 Zone BiWire Flexi panel EFBW8FLEXI  

Technical specifications

Power Specification (2x MB512 batteries required. Batteries not included)  
Input Voltage Range:  18.75 - 30.7V  
Maximum Current Drawn From Battery:  2.7A  
     
Zone Circuits    
Number of Zones: 2 / 4 / 8  
Devices Per Zone:  BiWire Mode: Max of 32 BiWire Detectors and Manual Call Points, total loading including BiWire sounders cannot exceed 200mA in alarm
Conventional Mode: Max 32 Conventional Detectors and Manual Call Points
Intrinsically Safe Conventional Mode: Max of 10 intrinsically Safe Detectors and Manual Call Point
 
Maximum Loading per Zone: 200mA  
Standby Zone Voltage: Vmin 19Vdc
Vmax 23Vdc
 
Alarm Zone Voltage: Vmin 31Vdc
Vmax 33Vdc
 
Fuse Protection Per Zone:  250mA PTC  
End of Line Termination: BiWire Zones: EOLM-3 Only
Standard Conventional Zones: EOLM-1 only
Intrinsically Safe Zones: 6K8 resistor
 
     
Conventional Sounder Circuits    
Number of Sounder Circuit:  BiWire Flexi 2 & 4 zone panels: 2 conventional sounder circuits
BiWire Flexi 8 zone panel: no conventional sounder circuits if all zones are in BiWire mode
BiWire Flexi 8 zone panel: 2 conventional sounder circuits if up to 4 zones are in conventional mode
BiWire Flexi 8 zone panel: 4 conventional sounder circuits if 5 or more zones are in conventional mode
 
Maximum Loading Per Circuit: 500mA  
Fuse Protection Per Circuit: 500mA PTC  
End of Line Termination:  6K8 Resistor   
     
Unmonitored Outputs    
Fire, Fault, Interlink Relay: Type - Volt-Free, Single Pole Double Throw
Rating - 30V DC, 1A
Fuse - 500mA PTC
 
Auxiliary Output: V - 18.15-30.7V
Imax - 50mA
Fuse - 50mA PTC
 
     
Unmonitored Inputs    
Class Change: Open Circuit - Normal Panel Operation
Short Circuit - Activate All Sounders
 
     
Communications Ports    
Repeater Port (use of this port is outside the scope of EN54): Type - RS485
Nodes - 1
 
     
Environmental    
Operating Temperature: -5°C to +40°C  
Relative Humidity (Non-condensing):  93% +/-3%   
IP Rating: IP30  
     
Mechanical    
Weight (excluding batteries): 2.25kg  
Materials: PC ABS Front and Rear  
     
Cabling    
Cable Access: 29 x 20mm drill positions - Slots for rear cable entry
 
Cable Type: Firetuf  FT120 / FP200
Cable type 2  core 1.5mm, screened fire rated cable, 500m (Max per zone)
 
     
Compliance    
Standards:  EN54 Part 2 CIE & Part 4 PSE, BS5839-pt1  
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