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An alarm is generated when the vibrations add up to more than the specified
number within any 30 second period. The 30 second period is a rolling time
window. For example, if Pulse Count is set to 6, when the sixth vibration occurs,
the timer rolls back 30 seconds and counts how many vibrations occurred during
this time. If all 6 vibrations occurred during the 30 second window, an alarm is
generated. Shock pulse counting prevents small repetitive attacks such as the
window frame being attacked with a glasscutter.
Gross Attack and Pulse Count events will be logged in the panel event log. The
Shock Gross Alarm will include the peak value which caused the alarm. This
allows to adjust the Gross Attack Count value in case it is set to sensitive.
Hardwired shock sensors are supported with xGenConnect panels firmware
version 11.xx and higher, and NXG-2xxN firmware version 0.11 or higher. Note
that only the first 8 inputs of the NXG-216N zone expander support wired shock
sensors. The last 8 inputs can be used as normal intrusion zones; however, no
shock analyzation is available on these inputs.
Power Requirements
The xGenConnect intrusion panel family is designed to be used with a 16 VAC
1.5 A (NXG-4, NXG-8, NXG-8E), 20 VAC 1.5 A (NXG-9), 35 or 40 VA
transformer which is included with xGenConnect panel kits. This transformer
includes a 500 mA 250 VAC fast blow replaceable fuse on the terminal block. If
more current is required, add NXG-320 Smart Bus Power Supplies.
Cable Requirements
The system RS-485 communication bus is used to connect keypads and in- and
output expanders to the xGenConnect intrusion panel.
•
For cable specifications, see "xGenConnect Specifications > xGenConnect
Bus" on page 5.
Cable must provide:
>= 13 twists per metre or >= 4 twists per foot,
<= 52 pF per metre or <= 16 pF per foot,
and characteristic impedance 100 to 120 Ω.
•
800 m total cable run on system.
•
Max. 800 m from remote device to xGenConnect control panel.
•
Max. 32 devices plus panel.
•
Max. 16 keypads, as part of the 32-device limit.
Grounding
All devices designed for the system have earth connections via metal studs to
the metal housing. Make sure that these metal studs make good connection to
the housing (beware of paint). The earth connections of every piece of equipment
in the system can be used for connecting the screen of shielded cables.
24
xGenConnect Installation and Programming Guide
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