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Insufficient Time
There may be circumstances when the system will operate as intended, yet the occupants will not
be protected from an emergency due to their inability to respond to the warnings in a timely man-
ner. If the system is remotely monitored, the response may not occur in time to protect the occu-
pants or their belongings.
Motion Detectors
Motion detectors can only detect motion within the designated areas as shown in their respective
installation instructions. They cannot discriminate between intruders and intended occupants.
Motion detectors do not provide volumetric area protection. They have multiple beams of detec-
tion and motion can only be detected in unobstructed areas covered by these beams. They cannot
detect motion which occurs behind walls, ceilings, floor, closed doors, glass partitions, glass
doors or windows. Any type of tampering whether intentional or unintentional such as masking,
painting, or spraying of any material on the lenses, mirrors, windows or any other part of the detec-
tion system will impair its proper operation.
Passive infrared motion detectors operate by sensing changes in temperature. However their
effectiveness can be reduced when the ambient temperature rises near or above body tem-
perature or if there are intentional or unintentional sources of heat in or near the detection area.
Some of these heat sources could be heaters, radiators, stoves, barbecues, fireplaces, sunlight,
steam vents, lighting and so on.
Power Failure
Control units, intrusion detectors, smoke detectors and many other security devices require an
adequate power supply for proper operation. If a device operates from batteries, it is possible for
the batteries to fail. Even if the batteries have not failed, they must be charged, in good condition
and installed correctly. If a device operates only by AC power, any interruption, however brief, will
render that device inoperative while it does not have power. Power interruptions of any length are
often accompanied by voltage fluctuations which may damage electronic equipment such as a
security system. After a power interruption has occurred, immediately conduct a complete sys-
tem test to ensure that the system operates as intended.
Security and Insurance
Regardless of its capabilities, an alarm system is not a substitute for property or life insurance.
An alarm system also is not a substitute for property owners, renters, or other occupants to act
prudently to prevent or minimize the harmful effects of an emergency situation.
Smoke Detectors
Smoke detectors that are a part of this system may not properly alert occupants of a fire for a num-
ber of reasons, some of which follow. The smoke detectors may have been improperly installed
or positioned. Smoke may not be able to reach the smoke detectors, such as when the fire is in a
chimney, walls or roofs, or on the other side of closed doors. Smoke detectors may not detect
smoke from fires on another level of the residence or building.
Every fire is different in the amount of smoke produced and the rate of burning. Smoke detectors
cannot sense all types of fires equally well. Smoke detectors may not provide timely warning of
fires caused by carelessness or safety hazards such as smoking in bed, violent explosions, escap-
ing gas, improper storage of flammable materials, overloaded electrical circuits, children playing
with matches, or arson.
Even if the smoke detector operates as intended, there may be circumstances when there is insuf-
ficient warning to allow all occupants to escape in time to avoid injury or death.
Warning Devices
Warning devices such as sirens, bells, horns, or strobes may not warn people or waken someone
sleeping if there is an intervening wall or door. If warning devices are located on a different level of
the residence or premise, then it is less likely that the occupants will be alerted or awakened. Aud-
ible warning devices may be interfered with by other noise sources such as stereos, radios, tele-
visions, air conditioners, other appliances, or passing traffic. Audible warning devices, however
loud, may not be heard by a hearing-impaired person.
SIMPLIFIED EU DECLARATION OF CONFORMITY
Hereby, Tyco Safety Products Canada Ltd declares that the
radio equipment type Wireless Alarm System with Integral
Cellular Alarm Communicator is in compliance with Dir-
ective 2014/53/EU.
The following models are covered by this guide: WS900-19,
WS900-29, 3G7090, LT7090 (used in North America only),
WS901-14, WS901-24EU, WS901-18, WS901-28, WS911-
18, WS911-28, and 3G7090-EU.
The full text of the EU declarations of conformity for the mod-
els mentioned below are available at the following internet
addresses:
Model WS901-14: http://dsc.com/pdf/1707001
Model WS901-24EU: http://dsc.com/pdf/1707002
Appendix 4: Limited Warranty
Model WS901-18: http://dsc.com/pdf/1707003
Model: WS901-28: http://dsc.com/pdf/1707004
Model: WS912-18: http://dsc.com/pdf/1803001
Model: WS912-28: http://dsc.com/pdf/1803002
Product specifications:
Frequency Bands
g1 433.04MHz – 434.79MHz
h1.4 868.0MHz – 868.6MHz
h1.5 868.7MHz – 869.2MHz
2400MHz-2483.5MHz
EGSM/EDGE: 880MHz – 915MHz
DCS/EDGE: 1710MHz – 1785MHz
FDD Band VIII: 880MHz – 915MHz
FDD Band I: 1920MHz – 1980MHz
European single point of contact
Tyco Safety Products, Voltaweg 20, 6101 XK Echt, Neth-
erlands
The WS912-28 Control Panel with 3G7090E-EU cellular
communicator has been certified by Telefication according
to EN50131-1:2006+A1:2009+ A2:2017, EN50131-3:2009,
EN50131-4: 2008, EN50131-10: 2014, EN50131-6:2017
(Type A) and EN50136-1:2012 (SP2,DP2) for Grade 2,
Class II. For EN50131 compliant installations, with alarm
control panels WS912-28 only the intrusion portion of the
alarm system may be activated.
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Maximum Power
10mW
10mW
100mW
Class 4 (2W) @ 900 MHz, E-GSM
Class E2 (0.5W) @ 900 MHz, EDGE
Class 1 (1W) @ 1800 MHz, DCS
Class E2 (0.4W) @ 1800 MHz, EDGE
Class 3 (0.25W) @ 900/1800 MHz, FDD I/VIII
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