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Single-area extinguishing
release control panel

Sigma ZXT – precise control, clear system visibility, and dependable extinguishing performance.

Overview

A development of its proven Sigma XT range which has been installed globally in its thousands, the Sigma ZXT provides controls and indications for a single-area extinguishing release system, enabling targeted extinguishing that limits damage and reduces cost.

Three conventional detection zones provide the alarm ‘trigger’ required to activate the release of extinguishant, and the system can be configured to release the extinguishant on an alarm from any single zone or combination of multiple zones.

Sigma ZXT continues to be backward compatible with Sigma SI status units and ancillary boards allowing easy upgrade of existing Sigma XT installations.

Dynamic LCD Status Display

LED status indicators provide notification of the detection and extinguishing system status. The LCD displays system status including a visual countdown display for extinguishing release.

1000 Event Log

Record and download all events occurring on the system from Alarms, Faults, Disablements etc. Storing up to 1000 events, it provides historical data for event diagnostics and investigations following an extinguishing release.

Expandable System With RS485

Supports up to 7 Status Indicator panels and 7 ZXT Ancillary boards via RS485 communication, enabling flexible and scalable expansion for larger protected areas. Also compatible with Sigma SI status units for retrofit applications.

Four User Passcodes

Up to 4 individual user access protected with unique six-digit passcode or by the optional enable control key switch. All access is recorded in the event log.

Single Or Dual Extinguishing Outputs

Configured to provide a single or secondary extinguishant releasing output. Supports common or main/reserve cylinder setups, improving system resilience and reducing downtime after activation.

Main Features

  • Secure Event logging 1000 events
  • Single area extinguishing panel
  • Dual extinguishing outputs with main/reserve configuration option
  • Dynamic LCD Display
  • Compatible with I.S. barriers
  • Non-latching zone input option to receive signals from other systems such as aspirating equipment
  • Countdown timer shows time remaining until release
  • Supports up to seven, four-wire status indicators (also compatible with Sigma SI status units for retrofit applications)
  • Approved and certified to EN12094-1, EN54-2 and EN54-4
  • Four configurable User passwords can identify who has accessed the panel and what changes were implemented

Technical Documentation

Click to download the documentation

Datasheets

Manuals

System Diagram

Certificates

How-to Videos

Accessories

Sigma ZSi Sigma XT Main/Reserve Duty Extinguishant Keyswitch Unit Sigma XT Extinguishant Extract Key Switch Sigma XT Extinguishant Hold Off Units Sigma XT Extinguishant Abort Button Sigma XT Ancillary Board Docbox Relay Boards Plant Isolate/Audio Visual Remote Indicator Unit
  • Sigma ZSi
  • Sigma XT Main/Reserve Duty Extinguishant Keyswitch Unit
  • Sigma XT Extinguishant Extract Key Switch
  • Sigma XT Extinguishant Hold Off Units
  • Sigma XT Extinguishant Abort Button
  • Sigma XT Ancillary Board
  • Docbox
  • Relay Boards
  • Plant Isolate/Audio Visual
  • Remote Indicator Unit

Sigma ZSi Status units are designed to provide status indications and limited controls remotely from the ZXT extinguishing control panels. These can be located at additional access and egress points to the risk area.

Sigma ZSi

The K13480M10 Main/ Reserve switch provides a convenient and secure means to operate a switch to reserve extinguishing system agent where such provision is made as a back up to the main agent. The “901” key is common to many fire detection and protection control panels and is removable in either position. The robust enclosure allows for either surface mounting or mounting to a single gang flush box.

Sigma XT Main/Reserve Duty Extinguishant Keyswitch Unit

The K13520M10 Extract unit provides a convenient and secure means to operate extract fan plant assosciated with the fire protection extinguishing system. The “901” key is common to many fire detection and protection control panels and is retained in the operated position. The robust enclosure allows for either surface mounting or flush with optional collar.

Sigma XT Extinguishant Extract Key Switch

Sigma Si Hold off units are available with red or green actuators (BS 7273-1 recommends white with red button) and are mounted in a single gang, surface mounting enclosure. For flush mounting, the enclosure may be discarded, and the unit mounted to a standard UK single gang electrical back box.

Sigma XT Extinguishant Hold Off Units

The K13470M10 Abort unit provides a highly visible point to enable an immediate abort of a fire protection extinguishant release. The large red, domed pushbutton latches when pressed and requires a twist action to release. The robust enclosure allows for either surface mounting or mounting to a single gang flush box.

Sigma XT Extinguishant Abort Button

The Sigma XT Ancillary Board is compatible with all Sigma XT control panels which have operating software version SIGXT_11A.HEX or above.

Sigma XT Ancillary Board

Designed to provide a convenient method of storing system test records, manuals, configuration files, keys and other documents or access arrangements for fire alarm and protection systems, the Sigma DocBox is finished and constructed in a similar manner to Sigma and Syncro AS fire alarm control equipment.

Docbox

Easy to fit and wire for additional control functions or to expand the capability of existing relay outputs, these simple boards contains either one or four 24V DC relays, which can be used for any extra-low voltage switching applications.

Relay Boards

A range of indicator units with either red or yellow indicators to provide an audible and visual status of alarms, isolation’s or other functions.
These units are available with a keyswitch to silence the internal buzzer or a keyswitch to illuminate the indicator and buzzer. A volt-free contact is provided when the keyswitch is operated for ancillary control functions.

Plant Isolate/Audio Visual

Remote Indicator Units provide an extension for LED indicators on hidden detection devices to allow their status to be observed without having to expose the detection device itself.
All units have dual, bright LED indicators with a wide viewing angle that flash alternately to attract attention, and are available mounted to square or round metal plates for fitting to standard electrical back boxes.

Remote Indicator Unit

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