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Power Supply
ELK-P412
4 Amp, 12 Volt DC Power Supply &
Battery Charger with Enclosure
APPLICATION
The ELK-P412 is a general purpose high current power supply and battery charger. It is ideal for alarm, access control,
and CCTV applications requiring up to 4 Amps. It distributes 12 Volts D.C. power to three (3) sets of DC power terminals, each having a voltage present indicator LED and automatic resetting overload protection. Built-In Low Battery Cutoff circuit protects the battery from deep discharging if AC power is lost for an extended period of time.
FEATURES
Switching Power Supply, no transformer needed.
•
Regulated 12VDC Output, capable of delivering 4 Amps.
•
Automatic Resetting Overload Protection.
•
Three Individually PTC Fused (2.5A) DC Power Outputs.
•
Master AC and Battery ON / OFF Power Switch.
•
Visual AC and DC LED Power Indicators.
•
Built-In Battery Charging Circuit.
•
Includes (1) Six foot AC Power Cord and cable clamp.
•
Heavy Duty Enclosure.
•
Lifetime Limited Warranty, call for details.
•
Automatic Low Battery Cutoff Circuit Protects Battery
•
SPECIFICATIONS
•
•
•
•
•
•
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from Deep Discharge.
DC Output Voltage: 13.8 Volts D.C.
Current Rating: 4 Amps .
Auto Resetting "fuseless" circuit breakers (PTC).
AC Input Voltage Range: 85~264VAC @ 47~63Hz.
Low Battery Cutoff: ~=10 Volts.
Ripple & Noise: 100mVp-p.
Enclosure Dimensions: 12"H x 12"W x 3.25"D.
Features and Specifications subject to change without notice.
4 AMP POW ER SUPPLY
Before plugging
in the power
cord, replace the
snap-on cover
over the AC
terminals for
shock protection
AC
INPUT
LN -V+V
120VAC POWER
CORD (6')
FILE E127738
EARTH
GROUND
OUTPUT
GRDNEUTRLLINE
DC
WARNING
SHOCK
HAZARD
AC
POWER
ON LED
DO NOT ADJ UST
(FACTORY SET)
BLACK
RED
NEG
OUTPUT 1
LOAD 1
POWER ON LEDS
+12V
NEG +12V
OUTPUT 2
LOAD 2
NEG +12V
OUTPUT 3
LOAD 3
POWER
ON
SW1
POWER
OFF
+
-
+
-
14.5VDC IN
BATTERY
INSTALLATION / OPERATION
1. Set Master Power Switch (SW1) to Power Off.
2. Mount enclosure in secure location near an AC power
outlet that is not controlled by a switch.(supplied
power cord is 6 feet long)
3. Connect devices to be powered to the screw
terminals for DC output.The power distribution board
has three sets of outputs, each set is limited to 2.5
amps. If a device requires more that 2.5 Amps, parallel
two sets of terminals. (DO NOT EXCEED 4 AMPS)
4. Connect Battery to the battery wires, observe polarity.
5. Plug in the AC cord. Warning High Voltage is now
present at the power supply AC input terminals.
6. Set the Master Power Switch to Power On. The LEDs
at the power outputs should be on (if any are off,
check for overloaded condition). The connected
devices are now powered.
7. If AC power is lost, the Low Battery circuit will
disconnect the battery if it's voltage drops below 10
Vdc. This helps to prevent "deep discharging" of the
battery.
P.O. Box 100 • Hildebran, NC 28637 USA • 828-397-4200 • 828-397-4415 FAX
http://www.elkproducts.com • email: info@elkproducts.com
05/10
12 Volt Battery
(Purchase separately)
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ELK-P412 Installation & Hookup Examples
APPLICATION: DUAL 2 AMP HOOKUP
For two separate 2 Amp continuous loads. DO NOT
EXCEED 4 AMPS TOTAL. The third output can not
be used in this configuration.
4 AMP POWER SUPPLY
WARNING
SHOCK
HAZARD
EARTH
GROUND
AC
INPUT
LN -V+V
DC
OUTPUT
GRDNEUTRLLINE
DO NOT ADJUST
(FACTORY SET)
-
RED
BLACK
12 Volt
Battery
AC
POWER
ON LED
2 AMP LOAD
(Sirens,etc)
+
POWER ON LEDS
NEG
+12V
NEG +12V
OUTPUT 1
-
2 AMP LOAD
(Cameras, etc)
NEG +12V
OUTPUT 2
OUTPUT 3
OUTPUT 3
CAN NOT BE
USED IN THIS
CONFIGURATION
+
POWER
ON
SW1
POWER
OFF
+
-
+
-
APPLICATION: 4 AMP HOOKUP
Parallel any two outputs together for heavy loads up
to 4 AMPS continuous. The third output can not be
used in this configuration.
4 AMP POWER SUPPLY
WARNING
SHOCK
HAZARD
EARTH
14.5VDC IN
BATTERY
GROUND
AC
INPUT
LN -V+V
GRDNEUTRLLINE
RED
BLACK
12 Volt
Battery
DC
OUTPUT
AC
POWER
ON LED
DO NOT ADJUST
(FACTORY SET)
-
4 AMP LOAD
(CONTINUOUS)
POWER ON LEDS
NEG
+12V
NEG +12V
OUTPUT 1
+
NEG +12V
OUTPUT 2
OUTPUT 3
OUTPUT 3
CAN NOT BE
USED IN THIS
CONFIGURATION
POWER
ON
SW1
POWER
OFF
+
-
+
-
14.5VDC IN
BATTERY
BLOCK DIAGRAM of DC Output Terminals
Each output can provide up to 2.5 Amps each (fused at
2.5 amps). However, the combined load from all outputs
must not exceed 4 Amps continuously.
4 AMP POWER SUPPLY and BATTERY
(CURRENT DRAW OVER 4 AMPS WILL COME FROM THE BATTERY)
2.5 AMP
FUSE (PTC)
OUTPUT 1
UP TO
2.5 AMPS
-
+
2.5 AMP
FUSE (PTC)
OUTPUT 2
UP TO
2.5 AMPS
--
++
CONNECT LOADS TO EACH OUTPUT OR COMBINE
OUTPUTS TO SUPPLY MORE CURRENT
(DO NOT TO EXCEED 4 AMPS TOTAL)
2.5 AMP
FUSE (PTC)
OUTPUT 3
UP TO
2.5 AMPS
APPLICATION: AC Power Failure Indicator
This hookup will activate a 12 volt sounder if AC Power
is lost.The ELK-912 relay will be energized while AC
Power is ON. If AC Power is lost then the relay will turn
off closing the COM and N.C. contacts to activate the
sounder. The sounder is powered from the Battery.
4 AMP POWER SUPPLY
WARNING
SHOCK
HAZARD
EARTH
GROUND
AC
INPUT
LN -V+V
BLACK
12 Volt
Battery
DC
OUTPUT
GRDNEUTRLLINE
DO NOT ADJU ST
(FACTORY SET)
Voltage is lost here during AC Power
Failure which will cause the relay to
drop out and activate the sounder
RED
AC
POWER
ON LED
POWER ON LEDS
NEG
+12V
NEG + 12V
OUTPUT 1
ELK-912 RELAY
NO COM NC
+
-
-
+
12 VOLT
SOUNDER
OUTPUT 2
POWER
ON
SW1
POWER
OFF
NEG + 12V
OUTPUT 3
+
14.5VDC IN
-
+
BATTERY
-
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