Data Sheet for Product
Addressable Air-Aspiration Smoke Detection System 
6158 
s Industry, Inc. 
Building Technologies Division 
s
Data Sheet 
Fire Safety Products 
Specialized Detection Devices 
Addressable Air-Aspiration Special Application Smoke Detectors 
[Used with compatible Siemens Intelligent, Addressable Detectors]
Models XAS-1-US, XAS-2-US 
Product Overview  Operation
Each air-sampling  special application  smoke 
detector provides a specialized, flexible detection 
solution to meet unique and challenging 
application requirements found at typical 
commercial and industrial sites. Single-inlet and 
dual-inlet are the two (2) types of duct  housings 
used for this innovative duct-sensor application. 
XAS series is Underwriters’ Laboratories  
(
UL /  ULC) Listed for use with the Siemens spot 
detectors, as well as with Siemens Model DB-11E 
mounting base.  Each air-aspiration device is 
highly conducive for inaccessible areas, as well as 
sections of a building where each detection device 
can be mounted outside the protected area. 
Some examples of exterior mountings suited for  
these specialized detection devices include: 
  correctional facilities 
  transformer vaults 
  cable tunnels 
  elevator hoist areas 
  heating, ventilation, and  
air-conditioning (HVAC) ducts 
Used with Siemens − Fire Safety fire alarm control 
panels (FACPs) that are compatible with Model 
HFP-11 addressable detectors, each of these duct 
housings actively draws air from the protected area 
via sampling holes in a pipe network. Sampled air 
is initially filtered and analyzed by Siemens 
intelligent, addressable  detectors incorporated in 
the single-inlet or dual-inlet duct housing. 
A high-performance aspirator, which is used in 
correlation with programmable flow-monitoring 
circuitry, allows these devices to function quickly 
and effectively. Air-flow level is displayed on a 10-
element bar graph that can be adjusted for high-
flow, low-flow thresholds. Flow failure is reported 
as a device fault event, via relays sent to the FACP. 
Each duct device is available with one (1) 
inlet pipe (Model XAS-1-US) or two (2) inlet 
pipes (Model XAS-2-US), and can be used 
with one (1) or two (2) detectors per FACP.
ARCHITECT AND ENGINEER SPECIFICATIONS 
• 
UL268, 268A Listed,  ULC-S529 Listed;
CSFM (
#
7259-1728:0124) Approved 
• 
High-performance aspirator 
•  Microprocessor-controlled operation 
•  Integral display and programmer 
•  Single or dual-channel fire detection 
•  Compatible with various Siemens 
intelligent, addressable detectors  
•  Multiple configuration options 
•  Sample pipe length: up to 164 ft (50 m) 
•  Adjustable aspirator speed 
with airflow monitoring 
•  Field-serviceable air-filter 
Single-Inlet 
Duct Sensor Housing 
[Model XAS-1-US] 
Dual-Inlet 
Duct Sensor Housing 
[Model XAS-2-US] 




