Linear 555LS, 557LS Owner's Manual

TRI-GARD 555LS/557LS SIGNATURE SERIES™

audio glassbreak detectors employ state-of-the-art Advanced
Signature Analysis

™

algorithms to sample four bands of audio
instead of one or two like most other detectors. Digital Signal
Processing (DSP) is used to continuously sample and analyze
the sound. Within milliseconds after an audio “event” begins,
the microprocessor starts crunching data. Approximately 1200
comparisons and decisions are made before an event is reject­ed or confirmed about 0.3 seconds later. Eight glassbreak sig­nature models and four false alarm models, stored in memory ,
are referenced during the confirmation process. The result of
this high-tech performance is more accurate glassbreak detec­tion and improved false alarm rejection in tough environments.

TRI-GARD 555LS/557LS FEA TURES

• Specified for plate,wired, tempered & laminated glass

• Microprocessor-based for better discrimination

• Advanced SignatureAnalysis™

• Signature Supervision

• Omnidirectional sensitivity

• Automatic sensitivity adjustments

TRI-GARD 555LS/557LS APPLICA TIONS

• Glassbreak protection in residential,commercial

and industrial areas

• Protects plate,wired, tempered & laminated glass

• Omni direction detection to protect multiple windows

•Areas with closed drapes or blinds will reduce range.

T est with 517 tester for specific range

•Wall orceiling mount installations

SPECIFICATIONS

SENSING:Audio/air,open space (enclosed area)
RANGE: 25’ for plate, wired, tempered & 20’ for laminated

glass. These ranges are for 1’ X 1’ minimum glass size. For
glass size down to 6” X 10” the range would be reduced by
1/2.

GLASS SIZE: Above stated range is for 1’ X 1’
THICKNESS:Plate- 3¼32" to1¼2"

Tempered–1¼8" to1¼2"

Wired–1¼4"to 1¼2"

Laminated–1¼4" to1¼2"

SENSING FIELD: Omni-directional
S

ENSOR: Electret condenser (F .E.T .pre-amp)

OPERATINGVOLTAGE: 10–16VDC filtered and regulated
P

OWER CONSUMPTION:30 ma @13.6VDC normal, 40 ma @

16 VDC.

O

PERATING TEMPERATURE:14° to120° F (-10° to 49° C)

STORAGE TEMPERATURE:-13° to185° F (-25° to 85° C)
RELA YACTIV ATION TIME: 3 seconds
A

LARM LED: Latch orauto reset

A

LARM RELAY:SPDT (Form-C)- contacts .1Amp @30VAC/24

VDC Relay is energized upon power up (C & NC are closed)

TAMPER CIRCUIT:Normally closed switch-contacts 50

milliamps @ 30VAC/24VDC.

V

OLTAGE

MONITOR

: Low or novoltage causes alarm relay to

open. Lowvoltage <10VDC causes red LED to flash slowly

I

NSTALLATION

: Hardwire 6wires including 2 for tamper

Testing: Follow instructions & test once a year
MOUNTING: Surface– screw andanchors included
C

OLOR

:White or Cabin Brown

SIZE:3" x 3" x 3¼4"

TRI-GARD555LS/557LSSignature Series

™

Audio Glassbreak Detectors

NOTE 1: The use of mini-blinds, shades, drapes* and sun film* can

reduce the range of the detector by 50%. Since room acoustics and win­dow coverings can vary considerably, all detector installations should be
checked with the 517 tester.
* Not for sound deadening drapes
* Tested w/ 3M sun film #SH2CLAR (3M is a trademark of 3M Company)

555LS

557LS

MOUNTING LOCATIONS

The Tri-Gard can be mounted on any type of ceiling or wall.
The detector should be no closer than 4 feet from the glass to

be protected.Since the sound waves of breaking glass travel
directionally out at a 90° degree angle from the broken win­dow, the best mounting location is on the opposite wall,
assuming the wall is within detection range.

For maximum performance install the detector in direct line of
sight to all glass that you are protecting and locate the detector
at least 1 foot from any corner or ceiling.

For best false alarm immunity the detector should be mounted
at least 4’ from the glass to be protected and from noise sources
such as kitchen sinks,stereos,televisions,etc.

WALL MOUNTING

Mount the detector on an opposite or adjacent wall from the
glass to be protected.

The unit should be mounted at least 6 feet from the floor. This
will ensure that no furniture or other objects will block the
direct line of sight, thereby providing maximum glassbreak
protection.

NOTE:The unit should not be mounted on the same wall as
the glass to be protected.

CEILING MOUNTING

Mount the 555LS/557LS in any location on the ceiling which
is in direct line of sight of the glass to be protected.

T o ensure maximum glassbreak detection do not mount the

detector within 1 foot of any side wall.

Mount the 555LS/557LS on any solid material.

555LS/557LS OPERATIONS AND WIRING

On power-up the microprocessor will momentarily turn on
each LED.

LEDs Operation:

• Green LED ON–solid indicates unit is properly powered.

• Green LED OFF–indicates that the relay has dropped out,due
to the detector being tripped or no/low power (<10VDC).

• Green LED BLINKS–slowly to indicate that the unit is in test mode
(see test mode).

•Green LED FLASHES–when there are background noises
present within the detection range.

•Amber LED ON– solid indicates that the “Signature Supervision”
has not been able to test all circuits within the last120 hours.

• Red LED ON–solid indicates that the detector has been tripped
and is in a latched alarm memory condition.

• Red LED FLASHES–to indicate that there is an alarm for low
power condition, input voltage is (<10VDC).