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FEATURES

• Suitable for High Air Velocity Duct Applications
• Standard XLS Intelligent Smoke Detectors
• Standard, Relay, or Isolator Detector Mounting Base
• Installs in Ducts up to 10 feet (3m) Wide
• Remote LED Accessory
• Designed and Manufactured per ISO 9001 Standards

GENERAL

The Excel Life Safety (XLS) SIGA-DH Duct Smoke Detector Housing uses all the capabilities of XLS intelligent photoelectric and multisensor smoke detectors. XLS intelligent smoke detectors gather analog information from their sensing element(s) and converts it into digital signals. The onboard microprocessor in the detector measures and analyzes these signals. It compares them to historical readings, time patterns, and known characteristics to make an alarm decision. Digital filters and complex algorithms are applied for optimum detector accuracy.

The large access door on the SIGA-DH is completely removable to facilitate fast detector installation and field wiring connections. Five 1-gang knockouts on the duct detector housing provide convenient locations for mounting XLS intelligent modules. 

DUCT SMOKE DETECTOR HOUSING
ACCESSORIES

Air Sampling Tubes
The Duct Detector Housing uses an air sampling inlet tube
and an exhaust tube. Air sampling tubes are available in
lengths from 8 in. (200 mm) to 10 feet (3m) and must be
ordered separately. The Duct Detector Housing includes a
6 in. (150 mm) exhaust tube.

Detector Mounting Bases
Each Duct Detector Housing requires a detector mounting
base (ordered separately) to accommodate the intelligent
smoke detector. Available mounting bases are as follows:

Standard Base SIGA-SB�
Basic mounting base; supports the SIGA-LED Alarm LED.

Relay Base SIGA-RB�
Mounting base with dry contact relay (normally open or
normally closed) controlled by the intelligent smoke detector.
The relay is rated for 1A @ 30 Vdc (pilot duty). The relay
position is supervised. The Relay Base does not support the
SIGA-LED Alarm LED.

The relay operates as follows:

• At system power-up or reset, the relay is de-energized
• On installation of an intelligent smoke detector in the
  Relay Base with the power on, the relay energizes for
  4 seconds, then de-energizes.
• On removal of an intelligent smoke detector from a Relay
  Base with the power on, the relay is de-energized.
• When the detector enters the alarm state, the relay is energized.