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Introduction
The 7720V2 self-contained subscriber radio is the subscriber end of a Long Range
Radio alarm reporting system. As a communications link, the 7720V2 is comparable to a
digital communicator connected by telephone line to a central monitoring station.
System Features
Wireless
Reporting
Integrated
Electronics
Alarm
Inputs
Compatibility
Built-in
LED
Indicators
Built-in
Tamper
Protection
Antenna
Included
Programmable
Features
Self-Diagnosing
Transmitter
Power
Supply
Low
Battery
Monitoring
Alarm and status messages are transmitted to the master station network via radio
signals, which means faster and more secure reporting.
The entire radio link equipment, including intertace, transmitter, power supply, battery
and antenna, is housed in a single unit, requiring only battery charging power and alarm
inputs from a compatible alarm panel.
The 7720V2 can monitor alarm inputs, discrete 4 zone contact closures or their
electrical equivalent.
The 7720V2 is compatible with existing installations using ADEMCO equipment or
other control
panels.
The 7720V2
can be used in conjunction
with digital
communicators on the same system, each acting as backup to the another (use an
ADEMCO 659-EN Line Monitor connected to a zone input to report a line cut and
backup a digital dialer, while connecting the radio fault output to a zone on the dialer).
Three LEDs are used to indicate message transmissions, low battery conditions and
radio faults. A blinking yellow LED indicates normal operation. (See LED Table later in
this section).
For added protection, built-in cover tamper switches can trigger an alarm whenever the
chassis cover is removed, thus protecting against unauthorized access to the 7720V2.
The tamper zone number is an internal system zone number (zones 5-8 can be chosen)
and must be programmed to enable tamper reporting.
The 7720V2 can use either the supplied omni-directional wire antenna, or can use a
7825 outdoor antenna, 7625 omni-directional antenna, 7625-dB antenna (if additional
gain is required), a 7674, a 7674-13 YAGI antenna (if directional antenna is required), by
using the optional 7720ANT connector kit. For wall mounting, an optional 7825DP can
be used. The supplied antenna mounts directly to the 7720V2. The other antennas
can be mounted remotely (if desired) using pre-assembled coaxial cable available from
ADEMCO. Refer to the ANTENNA MOUNTING section for details.
The 7720V2 utilizes EEROM (Electrically Erasable ROM) technology, which allows the
7720V2 to be programmed with a 7720P Programming Tool. The programming options
include channel assignments for Telco fault input, inverted trigger inputs, delayed
reporting channels (1-1 27 seconds delay, if selected; no delay (delay = 00) is allowed
for UL installations), open/close/restore reporting channels, etc.
Malfunctions of the transmitter,
including antenna fault, low output power, loss of
external p'ower, low internal DC voltage and internal radio-frequency circuit problems
can be displayed on the 7720P Programming Tool, as well as being transmitted to the
master station network, if the fault does not prevent such transmission. Faults can also
trigger contact closures on a Form "C" relay to indicate radio faults.
The 7720V2 is powered by its own 12 volt battery, which can be charged by an alarm
panel's output voltage (9.5-1 4.8VDC as measured between pins 1 & 2 on the radio).
The charging input draws approximately 10OmA continuous and 275mA peak current
during transmission. If other peripherals are connected to the control panel, make sure
the auxiliary charging voltage is calculated and verified with all peripheral at full peak
current draw.
NOTE:
The 7720V2TR
Power-Pack
can
be used
if there
is insufficient
charging
voltage
from
the
panel.
The 7720V2 notifies the central station of a low battery condition whenever the battery
voltage drops below 10.2VDC (+ 5?4.). Low battery restore messages are reported if
battery has been in "good" condition for at least 4 hours. Refer to the LOW BAITERY
DETECTION AND RESTORAL section for details on battery monitoring.
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