Frontline Combi Gas Alarm

Addressable/Direct Analogue Gas Monitoring System

Combi has been designed to operate in the full range of environments from commercial premises through to heavy industrial applications which may require hazardous area sensing. Typical monitor locations are - public buildings, car parks, tunnels, breweries, boiler plant rooms, water treatment works, H&V control, manufacturing, process plants, horticulture, hotels, offices.

Each gas sensor continuously monitors the atmosphere, reporting any hazardous conditions to the control unit, for display by the alpha numeric screen indicating the reporting sensor, gas type, concentration and alarm status. Alarm levels that are exceeded will automatically activate a variety of signal outputs including analogue/digital data and user selectable relays.

Additional Information

The Combi system operates on a 4-core (addressable) or 2/3 core (direct) cable network and has the capacity to monitor up to 64 addressable and 16 direct sensors of various gas types. Larger systems offering unlimited sensors can be achieved using multiple combi units housed in a 19” rack based system. The Combi is supplied ready to use with pre-calibrated gas sensors and provides for additional sensors that can be easily added to any point of the network.

Optional software (Combi Soft) allows full data logging facilities with system management providing real time views showing sensor locations, alarms status and actual gas values. Other optional featurse include a repeater panel, 64 additional relays and an addressable relay board.

Other features of the Combi system include automatic safety check diagnostics/system surveillance and system management via remote access, on screen text description of sensor locations, event data logging (internal 99 event), low cost installation and one man calibration utilising peak readings.

Case Study - Kuehne + Nagel / Intelligent Energy

Frontline Safety were approached by an existing customer to provide an adaptable solution for the provision of a fire and gas detection system within a modular building being used within a third parties premises. The fire and gas detection system comprised of integrated (non-addressable) fire alarm panel and a Combi gas detection panel.

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Sensor Points

  • 1-64 addressable – Can bus – and/or 16 direct 4~20mA
  • Combi Plus - 128 addressable


  • Combustible Gas - L.E.L., % vol
  • Toxic Gas - ppm, % vol
  • Oxygen - % vol Depletion/Enrichment
  • Refrigerant - ppm
  • Any 4 ~ 20mA transmitter

Indicators - control unit concentration

  • Dot matrix LCD 4 line 40 character - indicating sensor location, gas type, (rising or falling alarms), alarm status, system fault, sensor line fault, sensor fault, inhibit, real time clock, event memory
  • Red LED - global alarm, Amber LED - global fault, Amber LED-inhibit


  • 8 user selectable zone/voting – with NE/ND option and delay to de-energise
  • Relay contacts - 2 D.P.C.O / 6 S.P.C.O. rated @ 5A-230v AC
  • Factory set - 1 common low alarm D.P.C.O
  • 1 common high alarm D.P.C.O
  • 1 common overange S.P.C.O
  • 1 common fault alarm S.P.C.O
  • 4 user selectable S.P.C.O
  • General alarm relay - resetable S.P.C.O. - for sounders etc.
  • Optional - 64 relays - first 16 programmable with pattern/event with NE/ND options and delay to de-energise
  • Optional - remote addressable 4 way relay unit
  • 2 channel 4~20mA - assignable to any sensor
  • RS232 data log - event log
  • Modbus - RS485 x2
  • Combi Soft - full data logging and management tool - option.

Audible Alarm

  • Alarm/Fault - permanent mute option


  • 230/115v AC or 24v DC
  • Control unit 7.5w quiescent 17w full alarm
  • Sensor - 2.5w
  • Internal power supply, - 20 sensors max, - 21+ sensors - PS10 Power Pack required

Sensor Cable - Addressable Direct

Main network - 4 core (2 power - 2 comms) 1.5mm2 screened max length 1km 2/3 core


  • Enclosure cable entry - bottom, rear, top
  • Remote reset/mute
  • Front panel button – key lock
  • Repeater panel
  • 16 way 4~20mA catalytic converter panel
  • LED indication – Comms fail, Modbus fail, MPU fail
  • Password protection - user mode/engineers mode
  • LCD and LED dimming


  • Control unit - IP52
  • Operating temperature -10 + 50˚C


  • 315W x 265H x 95D - Combi panel
  • 315W x 265H x 95D - Auxiliary power pack
  • 4.95Kg
Technical Drawings

Technical drawings

Fixed gas phone

Contact Our Service Team Now - 0141 771 7749

Our dedicated team of Service and Project Engineers have a range of expertise and knowledge and are on hand to discuss your fixed fire and gas detection needs.  Call now on 0141 771 7749 or visit our Contact Us section on the website for more information.

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