Visonic GB501PG2 User Manual
GB-501 PG2
WirelessPowerGTwo‐wayGlass‐breakDetector
Installation Instructions
1. INTRODUCTION
The GB-501 PG2 is a wireless PowerG Two-way Glass-break detector designed to detect the breaking of framed glass mounted in an outside
wall.
The GB-501 PG2 combines two modules:
The Sentrol Inc. ShatterPro™ acoustic sensor with Pattern Recognition Technology™ (Protected under U.S. Patent 5,192,931)
The Visonic Ltd. MC-302 PG2 transmitter
A
A
A. Microphone
B. Detection indicator
Figure 1. General View
1.1 Acoustic Sensor
The acoustic sensor module of the GB-501 PG2 is omni-directional, providing 360° coverage. Coverage is measured from the sensor to the point
on the glass farthest from the sensor (see Fig. 3). The sensor can be mounted as close as 1 m (3.3 ft) from the glass.
B
A. PowerG transmitter module
B. Acoustic sensor module
Figure 2. Module Identification
B
When mounted on opposite wall or adjoining walls, the range is 6 m (20 ft) for plate, tempered, laminated and wired glass.
Figure 3. Typical Range Measurement
When mounted on the ceiling, the maximum range is 6 m (20 ft) for plate, tempered, laminated and wired glass
For armor-coated glass, mount the sensor no more than 3.65 m (12 ft) from the glass.
1.2 PowerG Transmitter
The acoustic sensor shares its housing with a miniature transmitter using PowerG 2-way communications protocol.
Upon alarm (glass break detection), a digital message is transmitted, composed of the PowerG ID followed by various status and message-type
markers. Alarm and other data are thus forwarded to the wireless alarm control panel.
The GB-501 PG2 is protected by a front tamper switch and back tamper switch that is activated when the cover is removed or when the base is
forcibly detached from the wall. In a tamper situation, a message is transmitted with the “tamper alert” marker ON.
A periodic supervision message, distinguished by a specific marker, is transmitted automatically. The wireless control panel is thus informed, at
regular intervals, of the sensor’s active participation in the system.
A red LED mounted on the transmitter PCB (visible only when the cover is off) lights whenever alarm or tamper events are reported. The LED
does not light while a supervision message is being transmitted.
2. INSTALLATION
2.1 Optimizing Detection and Avoiding False Alarms
For best detection, avoid installing in:
Rooms with lined, insulating, or sound deadening drapes.
Rooms with closed wooden window shutters inside.
For best false alarm immunity:
Avoid 24-hour loop applications (perimeter loop OK).
Don't use where white noise, such as air compressor noise, is present (a blast of compressed air may cause a false alarm).
Avoid rooms smaller than 3 x 3 m (10 x 10 ft) and rooms with multiple noise sources such as small kitchens, glass booths noisy areas,
garages, small bathrooms, etc.
D-303371 GB-501 PG2 Installation Instructions 1
Areas to avoid:
Glass airlocks and glass vestibule areas
Noisy kitchens
Residential car garages
Small utility rooms
Stairwells
Small bathrooms
Other small acoustically live rooms. For glass break protection in such applications, use shock sensors on the windows or window frames.
Do Not Install In Humid Rooms The Wireless GB-501 PG2 is not hermetically sealed. Excess moisture on the circuit board can eventually cause
a short and a false alarm.
Avoid 24-Hour Loop Applications The GB-501 PG2 is recommended for perimeter loops and is designed to function in occupied area. In 24hour loop applications, where the sensor is armed all day and all night, the false alarm prevention technology will be pushed to its limit. Some
sounds can duplicate the glass break pattern the acoustic sensor detects.
Install the GB-501 PG2 on a perimeter loop which is armed whenever the door and window contacts are armed.
Protecting Occupied Areas
The false alarm immunity is best in rooms with only moderate noise. For 24-hour occupied area protection, use shock sensors.
Proper Testing
The GB-501 PG2 is designed to detect the breaking of framed glass mounted in an outside wall. Testing the sensor with unframed glass, broken
bottles, etc., may not trip the sensor. The sensor typically does not trip to glass breaking in the middle of the room. No burglar breaks glass in the
middle of a room, so such “breaks” are false alarms.
NOTE: GB-501 PG2 may not consistently detect cracks in glass, or bullets which break through the glass. Glass-break sensors should always be
backed up by interior protection.
For best false alarm immunity the sensor should be located at least 1.2 m (4 ft) away from noise sources (televisions, speakers, sinks, doors,
etc.). The sensor must always be in direct line of sight of all protected windows. It cannot consistently detect glass breaking around corners, in
other rooms, etc. Front or back, up or down orientation is not necessary.
2.2 Sound Travel Considerations
Since the sound of breaking glass travels directionally out from the broken window, the best location for mounting the sensor is on the opposite
wall - assuming the glass to be protected is within the sensor's range and line of sight. The ceiling and adjoining (side) walls are also good sensor
locations. A ceiling mounted sensor will have better detection if positioned 2 - 3 m (6 - 10 ft) away from the protected glass into the room.
As with all glass-break sensors, detection is reduced with same-wall mounting, since such detection is partially dependent on glass break sound
reflecting off the opposite wall. Test the range with a Sentrol 5709C unit held flat against the glass. There may be a reduction in range, depending
on room acoustics.
2.3 Preparing the Unit
1. Use a screwdriver to separate the cover from the base, as shown in
Figure 4.
You will find inside a nylon bag with the battery, two masonry
anchors (wall plugs) and two mounting screws.
Figure 4. Opening the Unit
3. Insert the battery into
the battery clips, as
shown in Figures 6
and 7.
Observe Polarity!
A
Caution!
Risk of explosion if
battery is replaced by an
incorrect type. Dispose of
used battery according to
manufacturer's
instructions.
A. Negative terminal
B. Positive terminal
Figure 6. Battery Insertion
B
2. Get to know the items indicated in Fig. 5 - they are all relevant to the
steps you will have to take in the course of installation.
A B
C D
E
F
A. Battery C. Transmit Indicator E. Mounting holes
B. Tamper switch D. Enroll button F. Detection indicator
Figure 5. Inside View
Use only Lithium CR-123 type battery, Panasonic, Sanyo or GP
.
A
A. Properly seated battery
Figure 7. Battery in Place
2 D-303371 GB-501 PG2 Installation Instructions
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