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UL/FM Approved
Extinguishant Release Panel

Sigma A-XT – outstanding value and performance for small to

medium installations.

Overview

Sigma A-XT releasing panel offers outstanding value and performance for all small to medium fixed firefighting installations.

With three initiation circuits as standard, release can be configured to activate from any combination of detection zone inputs to allow (among other combinations) any two from three types of activations. For example, as would be required for detection in ceiling void, room and floor void applications. The configuration options of the Sigma A-XT allow the functionality of the system to be extensively modified. The panel contains a large LED display to enable easy configuration and control which also displays the time remaining TM until release for added user safety.

The countdown timer is duplicated on up to seven remote status units to provide local indication of the system status. With all the electronics mounted on a single, easily removable, steel plate, Sigma A-XT panels are both robust and easy to install. Sigma A-XT is supplied in an enclosure that matches the design and colour of the Elite RS range and is available in red or grey.

Countdown Timer

A built-in countdown timer provides a clear indication of the time remaining until extinguishant release.

Multiple Status Indicators

Supports up to seven four-wire status indicators, providing clear visual indication of system status throughout the protected area.

Flexible Releasing Logic

Any single zone or combination of zones can be configured to activate extinguishant release, providing flexibility for a wide range of applications.

Main Features

  • Three initiation circuits as standard
  • Any single zone or any combinations of zones can be configured to release
  • Configurable first stage NAC delays
  • Configurable detection delays
  • Zero time delay upon manual release option Compatible with I.S. barriers
  • Non-latching zone input option to receive signals from other systems such as aspirating equipment
  • Configurable releasing delays up to 60 seconds in five second steps
  • Configurable releasing duration up to five minutes in five second steps
  • Countdown timer shows time remaining until release UL864 and FM listed

Technical Documentation

Click to download the documentation

Datasheets

System Diagram

Manuals

Certificates

Accessories

XT+ Releasing Unit Sigma A-SI Sigma A-XT Disablement Switch Sigma A-XT Extinguishant Abort Switch Sigma A-XT Ancillary PCB
  • XT+ Releasing Unit
  • Sigma A-SI
  • Sigma A-XT Disablement Switch
  • Sigma A-XT Extinguishant Abort Switch
  • Sigma A-XT Ancillary PCB

XT+ releasing control units are multi-area releasing control units containing one or two releasing modules complying with UL 864 10th edition.

XT+ Releasing Unit

The Sigma A-Si range of status indicators provides detailed status information for Sigma A-XT releasing control equipment.

Sigma A-SI

Key removable in either position

Both sides of solenoid circuit are mechanically disabled during activation

Disablement illuminated at panel when active

Sigma A-XT Disablement Switch

The Sigma A-XT Abort Switch connects to the Abort terminals of the Sigma A-XT releasing panel. Any number of Sigma A-Si Abort Switches may be connected to the circuit.

Sigma A-XT Extinguishant Abort Switch

The Sigma A-XT Ancillary Board is compatible with all Sigma A-XT control panels. The board provides volt-free, normally-open contacts, enabling control of sub-systems and plant remotely from the main panel over a two-wire data bus.

Sigma A-XT Ancillary PCB

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