Data Sheet for Product

Siemens
Smart Infrastructure - Building Products
Data Sheet 9901
usa.siemens.com/fire
Product Overview
The Intelligent Thermal (Heat) Detector (Model HI921) provides an advanced method of
detection, address programming supervision ─ combined with sophisticated FACP
communication. Model HI921 uses a state-of-the-art thermistor, microprocessor and
advanced signal analysis, providing high reliability and accuracy.
Additionally, Each Model HI921 unit is UL listed including advanced built-in
ISOtechnology™ - a “True Class-X” SLC operation (use is optional) greatly improving
system reliability and circuit integrity while providing advanced addressable fault
finding.
Each model HI921 is a cost-effective, intelligent, addressable thermal detector that
provides distinctive, advanced features: seven (7) field-selectable temperature settings
specially tailored for application-specific detection needs combined with Class-X SLC
operation built-in avoiding additional installation and material cost.
The temperature-range settings for each Model HI921 detector is between 135°F (57°C) ─
175°F (79°C) with fixed and rate-of-rise programmability. This variance provides the
customer with maximum flexibility to program the temperature settings to suit multiple
application needs and changing environmental conditions.
Model HI921 can be configured to provide a low-temperature warning signal at 40°F
(4.4°C). This feature − along with a compatible FACP (Cerberus PRO Modular | FireFinder
XLS/V or with Cerberus PRO FC/FV922 or FC/FV924 FACPs) − serves as prevention of
water freezing in pipes for sprinkler systems, meeting NFPA 72
Operation
Model HI921 also utilizes a modern, accurate and shock-resistant thermistor to sense
significant changes in temperature.
Each Model HI921 detector has seven (7) pre-programmed parameter sets that can be
selected by the Siemens FACP.
Cerberus® PRO
Detectors and Peripherals
Thermal (Heat) Detector
Model HI921
Model HI921
Thermal (Heat) Detector
 Compatible with Siemens Model `H’-
series devices on the same loop (with
Cerberus PRO Modular | FireFinder XLS/V
| FC9–series fire-alarm control panels)
 Contains seven (7) field-selectable
settings in a temperature range of
135F – 174F (57.2C – 78.9C)
 Provides a low-temperature warning
of 40F (4.4C)
 Field programmable as rate-of-rise
or fixed temperature
 Tri-color detector-status light-emitting
diode (LED) with 360 ° view
 Compatible with Model 8720 | DPU
(device programmer / loop tester)
 Utilizes advanced, microprocessor-
based signal processing
 Each detector is self-testing:
- complete diagnostics
performed every 10 seconds
 Polarity insensitive via
SureWire™ technology
 Functions with Model DB-
11–series mounting bases
 Superior electromagnetic interference
(EMI) and radio-frequency interference
(RFI) immunity
 Restriction of Hazardous
Substances (RoHS compliant)
 UL 521 Listed, ULC Listed; FM (#3230,
#3210), CSFM (#7272-0067:0258) Approved
Architect & Engineer Specifications
 Built-in ISOtechnology™
 Compatible with Siemens Model `H’-
series devices on the same loop (with
Cerberus PRO Modular | FireFinder
XLS/V | FC9–series fire-alarm control
panels)
 Contains seven (7) field-selectable
settings in a temperature range of
135F – 175F (57.2C – 78.9C)
 Provides a low-temperature warning
of 40F (4.4C)
 Field programmable as rate-of-rise
or fixed temperature
 Tri-color detector-status light-emitting
diode (LED) with 360 ° view
 Compatible with Model 8720 | DPU
(device programmer / loop tester)
 Utilizes advanced, microprocessor-
based signal processing
 Each detector is self-testing:
- complete diagnostics
performed every 10 seconds
 Polarity insensitive via
SureWire™ technology
 Functions with Model DB-
11–series mounting bases
 Superior electromagnetic interference
(EMI) and radio-frequency interference
(RFI) immunity
 Restriction of Hazardous
Substances (RoHS compliant)
 UL 521 Listed, ULC Listed; CSFM (#7272-
0067:0258) Approved