Sur-Gard SG-DV4420, Руководство пользователя

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SYSTEM OVERVIEW
The SG-DV4420 is intended for use as a fire transmitter
only, for connection to a sprinkler riser or to output relay
contacts of an existing fire alarm control panel. This unit
does not include U.L.C. requirements for a complete
building fire alarm system such as multi-zone with alarm
and trouble indicators.
INPUTS
•
2 Class A zones
• 1 ELR supervisory zon
• 3 Normally closed Supervisory zones
OUTPUTS
•
Power supply Vaux 12V at 250mA w/15 Ah
battery 24V at 50mA output to power modem
• Operation controlled through program options
• 1 Programmable output PGM 1: Switched to
ground with current limiting resistor
ELECTRICAL SPECIFICATIONS
MAXIMUM LOOP RESISTANCE PER CONDUCTOR
Class-A loops
A1, A2 – 100 ohms
Supervisory loops
S1 – 2700 ohms ELR +/- up to 250 ohms
S2,S3,S4 – 500 ohms.
Eprom part number: Type 27C256.
Nominal current draw: 260mA with fully charged
battery and F1/F2 subset
powered.
Battery Required: 6.5 Amp hr minimum to 15
Amp hr rechargeable gel-cell
or sealed lead-acid battery
mounted in panel.
TRANSFORMER
Built-in, 16,5 Vac, 37VA Class 2 Transformer.
Dimensions: 29cm(W) x 35.5cm(H) x 12.5cm(D)
Weight: 3.7Kg
FEATURES
POWER SUPPLY
The SG-DV4420 has a built-in 12VDC to 24VDC
regulated converter power supply, to operate the F1F2
subset modem, a one Amp 12VDC power supply and
battery charger. The auxiliary power supply can be used
to power smoke detectors and other devices requiring
12VDC. 800mA 12VDC is available from the AUX
(positive) and GND (negative) terminals. It also includes
AC failure and low battery detector.
EEPROM NON-VOLATILE MEMORY
The EEPROM non-volatile memory is used to store the
programmable data needed for each installation such
as the ID code, the all call response, etc...
SERIAL OUTPUT
The serial output to the F1F2 subset modem is on a 6
position modular jack. A 6 foot modular cable is supplied
with the unit.
LOW BATTERY DETECTION
When the battery voltage falls below about 11V, this
internal circuit will be activated and the programmed
low battery code will be transmitted to the central station.
WATCH DOG CIRCUIT
The Watch Dog reset circuit continously monitors the
operation of the microprocessor. If a malfunction occurs
(due to lightning or other unusual event) this circuit will
restart the microprocessor in less than 10 seconds.
LOW BATTERY DISCONNECT CIRCUIT (NOT
ON BOARD ONLY VERSION)
If the battery voltage fall below about 10.5V, the system
will electrically disconnect the battery to prevent it from
being deep discharged. The system remains disconnected
from the battery until the AC power comes back ON or
until the dead battery is replaced with a sufficiently
charged battery.
CLASS A FIRE ZONES: “A1” & “A2”
The Fire zones A1 and A2 are supervised (normally
open alarm initiating contacts) Class A circuits designed
to accept sprinkler switches, manual pull stations, building
fire alarm control panel, alarm output relay contacts or
latching four-wire smoke detectors.
Circuit A1 has an “retard” activation delay. On alarm,
(fire loop shorted) once the activation delay has expired,
the alarm is transmitted to the central station. The “retard”
activation delay is programmed at location 21. If the fire
input A1 returns to normal or swings before the activation
delay has expired, there will be no transmitted alarm.
This activation delay feature makes it possible to use
vane type waterflow switches without false alarms from
pressure surges. There is also a restore delay time
programmable at location 22, to avoid nuisance repeat
alarms.