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UL-listed advanced
extinguishing control panel

Sigma ZXT UL – precise control, system monitoring,
and reliable response.

Overview

A development of its proven Sigma A-XT range which has been installed globally in its thousands, the Sigma ZXT UL 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.

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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.

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.

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 occuring on the system from Alarms, Troubles, Disablements etc. Storing upto 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 UL Ancillary boards via RS485 communication, enabling flexible and scalable expansion for larger protected areas.

Synchronised NAC Outputs

Three Notification Appliance Circuits (NAC) can be configured with three patterns - Steady, March, Temporal 3 to support synchronisation for Strobe and Horn/Strobe devices.

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Main Features

  • Single area extinguishing control panel
  • Four configurable user passwords (user access is recorded in the event log)
  • Secure event logging 1000 events with time and date stamping for system diagnostics
  • Dual extinguishing outputs with main/reserve configuration option
  • 3 detection zones with configurable coincidence operation
  • Dynamic LCD Display with LED system status indication
  • Operating temperature range: 23 °F (-5 °C) to 120 °F (49 °C)
  • 3 fully configurable Notification Appliance Circuits (NAC) outputs supporting Steady, March and Temporal 3 patterns
  • RS485 expansion supporting up to 7 ZXT UL Status Indicators and 7 Ancillary boards
  • Auto/manual operating mode key switch
  • Available in small and large enclosure options. Check datasheet for dimensions
  • Approved and certified to UL864 10th Edition and FM Listing (pending)

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Technical Documentation

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Datasheets

Manuals

System Diagram

Certificates

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Accessories

Sigma ZSi UL Sigma ZXT UL Ancillary Board Sigma A-XT Extinguishant Abort Switch Sigma A-XT Disablement Switch
  • Sigma ZSi UL
  • Sigma ZXT UL Ancillary Board
  • Sigma A-XT Extinguishant Abort Switch
  • Sigma A-XT Disablement Switch

Sigma ZSi UL status units are a UL approved accessory to the Sigma ZXT UL extinguishant release panel. The units provide remote system status indications and minimal controls at additional points of access and egress for the protected area.

Sigma ZSi

The Sigma ZXT Ancillary Board is compatible with all Sigma ZXT 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 ZXT UL Ancillary Board

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

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