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Multi-Area Addressable
Releasing Unit

XT+ Releasing Unit – Flexible releasing control designed to support

the most demanding system requirements.

Overview

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

Up to 15 releasing modules may be connected to a Elite RS fire alarm control panel. Each releasing module can accommodate a separate hazard defined by two specific zones.

Each XT+ unit is equipped with a 5.25 A power supply (120 VAC or 240 VAC) to power releasing modules and attached solenoids / actuators or sequential activators.

Each releasing module has a comprehensive set of inputs and outputs and is configurable via a simple programming interface provided by Loop Explorer 2.

Each releasing module may have up to 7 serially connected Sigma A-SI status units or Sigma A-XT ancillary boards.

Main Features

  • UL 864 10th Edition Listed
  • Up to 2 releasing areas / hazards per XT+ unit
  • Dual releasing outputs for each area (configurable as Main/Reserve)
  • First and second stage NAC outputs for each area
  • First and second stage volt free changeover relays for each area
  • Released volt-free relay per area
  • Trouble volt-free relay per area
  • Programmable output duration
  • Countdown indicator shows time until release in seconds
  • Mode select and manual release controls per area
  • Monitored remote manual release input
  • Monitored remote abort input
  • Monitored remote mode select input
  • Monitored remote released pressure switch input
  • Serial connections for status units and ancillary boards

Technical Documentation

Click to download the documentation

Datasheets

Manuals

Certificates

Accessories

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

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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