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DESCRIPTION |
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The LP-2/LPS-2
becomes an uninterruptible 2 Amp 12 or 24 volt DC power supply when
used with a transformer and lead acid battery. The output is
clean, continuous, linear DC that can be used to power the most
sensitive electronic devices. These units can be paralleled to
double or triple output current.
Selecting
12v or 24v with the 12/24 programming jumper sets the DC output,
battery charge voltage, trip points for the supervisory relays and
foldback current limiting. The battery charger will charge a
Sealed, Gel, or wet lead acid Battery.
The
current the battery draws from the LP-2/LPS-2 is determined by the
battery's condition, capacity, temperature and state of charge.
The LP-2/LPS-2 is protected against shorts and overloading with its
electronic circuitry and battery fuse or PTC. This same circuitry
also protects the minimum 50VA transformer. When the DC load
requires more than maximum output provided by the LP-2/LPS-2, the
battery can add up to 4 more amps. This may be necessary to sound
a siren for the duration of an alarm. The LP-2/LPS-2 has a
replaceable 4 amp battery fuse while the LP-2C/LPS-2C has an auto
resetting 4A PTC circuit breaker.
To test
the LP-2, battery and fuse: It is recommended that on a regular
basis, the output should be checked for proper voltage and current
while the AC power is disconnected.
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SPECIFICATIONS |
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Input AC
Transformer
Terminals 1 & 2
identified by .............. AC
12vdc at 2A DC Output
....... 16 – 18vac at 50VA
24vdc at 1.5A DC Output
.......... 24vac at 50VA
24vdc at 2A DC
Output........ 25 – 28vac at 70VA
12vdc at 1A DC
Output....... 24 – 28vac at 50VA
Note: To Avoid damage to
the transformer, do not use less than a 50VA (Volt Amp) rating.
When selected for 12vdc output and using a 24vac transformer, limit the
output current to less than 1 Amp.
AC LED Indicator (Next to
AC Input Terminal Strip)
Indicates Input
Power................... Red LED
DC Output Voltage Selector
12/24 Jumper on top right
of board. Place toward desired voltage setting.
CAUTION Select voltage with
load and battery(s) disconnected.
DC OUTPUT
Terminal 3 & 4
identified by................... DC
DC Output
voltage............. Nominal 12vdc/24vdc
Output voltage.. Typical
“AC ON” 13.75vdc/27.50vdc
DC Current maximum
continuous rating......... 1.8A
Intermittent Current with
Battery............. 6A
Note: Reserve at least
200ma for battery charging.
Load regulation, no load to
1.8A.......... .25%Typ
Ripple & noise @ 80%
load............. 40mv pp Typ
Short circuit with foldback
current limiting.. Yes
Maximum Current Output (No
Battery)....... 2.6Amps
Short Circuit Current (No
Battery).......... 700ma
Voltage Change after 1 year
of Continuous Operation
(Long Term Stability)..................... .03VDC
Ambient operating
temperature range.. -30oF to +130oF
Storage
Temperature............... -60oF to 190oF
Paralleling Units for more
power
Daisy chain each pin
together. Pin 1 to 1, 2 to 2, 3 to 3 and pin 4 to 4. It is
very important to keep the polarity of the pins the same.
When using one battery, use just one battery port connection and
trouble relay if applicable. Transformer specifications listed
above must be at least double.
Battery Charging: (Header
plug marked [–Bat+])
The battery charger is
precision set to float charge 12V or 24V Sealed, Gel or wet lead acid
batteries. Two 12V batteries are connected in series for
24V. A 12” battery cable assembly is provided to connect the
module to a battery. Red (+) 12vdc, Black (–) Neg.
Optional 12” cable assembly
for connecting two
12v batteries in series for
24volts...... 24SW
Optional 36” battery cable
(1) P/N:... WA-36IBAT
Battery(s), any type of
lead acid.. 12v 4AH-100AH
Battery
Fuse............................. 4A 3AGC
Battery PTC Auto
Resetting.................... 4A
Reverse battery hookup
protection........... Yes
To estimate the recharge
time in hours for depleted battery(s), multiply the AH rating times 2.2
(AH x 2.2). As an example, a 24v system with two depleted 12v 7AH
batteries would take about 15.4 hours to re-charge to 90%
capacity. To select battery(s), see standy selection table www.securitypower.com/an3batby.pdf .
LPS-2 Supervised added
features:
Trouble Output: 3P Terminal
block - annunciates low battery & AC Fail “C” contacts
rating................................ 2A/120vac
Three position trouble
terminal block is marked “NO, C, NC” are shown in the Normal,
energized, no trouble condition.
Trouble Low battery/AC Fail
voltage..... 12.1vdc/24.2vdc
Battery Cutoff
Battery Cutoff
Voltage............ 9.9vdc/19.8vdc
Battery Cutoff internal
relay contacts....... 15A
Battery Cutoff Relay is
normally energized for fail-safe operation.
Physical
Center-to-Center Terminal
Block Spacing with Self Clamping Screws .375”
Module Size................
3 ¾”H x 3 11/16”W x 1 5/8”D
Mounting Holes
Center-to-Center..... 3 5/16” W 3 7/16”H
Components Weight
LPS-2
module..................................... 3.2oz
9x9
Enclosure................................... 3.8lbs
100va
Transformer............................... 2.8lbs
50va Plug in
Transformer....................... 1.7lbs
Safety
LP-2/LPS-2 meets safety
UL1950 & EN60950
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 LP-2/LPS-2 Technical Sales
Sheet/Instructions
 Electronic
Security Devices Incorporated 10/14/03 jb
Specifications are subject to change without notice
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