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R
333 Bayview Avenue
Amityville, New York 11701
For Sales and Repairs, (800) 645-9445
For Technical Service, (800) 645-9440
© NAPCO 2005
DESCRIPTION
The NP-P5ASUP is both a charger and supervised power
limited supply that converts a low voltage AC input into a
12VDC or 24VDC power limited output, with 5A of continuous
supply current.
FEATURES
•
12VDC or 24VDC selectable output.
•
Maximum charge current .5 amps.
•
5 amps continuous supply current at 12VDC-24VDC.
•
Filtered and electronically regulated outputs.
•
Built-in charger for sealed lead acid or gel type batteries.
•
Automatic switch over to stand-by battery when AC fails
•
AC input and DC output LED indicators.
•
AC fail supervision (form "C" contacts).
•
Low battery supervision (form "C" contacts).
•
Short circuit and thermal overload protection.
•
Includes battery leads.
Board Dimensions: 179.3mm(L) x 108.7mm(W) x 45mm(H)
Specified at 25° C ambient.
VOLTAGE OUTPUT/TRANSFORMER SELECTION TABLE
Output
VDC
12VDC @ 5 amps
continuous supply current
24VDC @ 5 amps
continuous supply current
Note: Transformers with higher VA ratings may be used for all output
voltages above as long as you do not exceed 28VAC.
POWER SUPPLY / CHARGER
Switch
Transformer
Position
Requirements
1. ON
NP-TRF28100
2. OFF
1. ON
NP-TRF28175
2. ON
NP-P5ASUP
5 AMP SUPERVISED
INSTALLATION INSTRUCTIONS
The NP-P5ASUP should be installed in accordance with The
National Electrical Code and all applicable Local Regula-
tions.
1. Mount the NP-P5ASUP in desired location.
2. Set the NP-P5ASUP to desired DC output voltage via
SW1 (see Voltage Output/Transformer Selection Table).
3. Connect proper transformer to terminals marked [AC]
(see Voltage Output/Transformer Selection Table).
Use 18 AWG or larger for all power connections (Battery,
DC output). Use 22 AWG to 18 AWG for power limited
circuits (AC Fail/Low Battery reporting).
4. Connect devices to be powered to terminals marked [+
DC -]. Note: It is important to measure output voltage
before connecting devices.
damage.
5. When the use of stand-by batteries are desired, they
must be lead acid or gel type. Connect battery to termi-
nals marked [+ BAT -] on the board (battery leads in-
cluded). Use two (2) 12VDC batteries connected in se-
ries for 24VDC operation. Note: When batteries are not
used, a loss of AC will result in the loss of output voltage.
6. Connect appropriate signaling notification devices to AC
Fail & Low battery supervisory relay outputs marked [N.
C., C, N.O.].
Red
Green
(DC)
(AC)
ON
ON
Normal operating condition.
ON
OFF
Loss of AC, Stand-by battery supplying power.
OFF
ON
No DC output.
OFF
OFF
No DC output. Loss of AC. Discharged or no battery.
TERMINAL IDENTIFICATION
Terminal
Legend
AC/AC
Low voltage AC input (see voltage output/transformer selection table).
For 12VDC output use 28VAC or higher with 100 VA power rating or higher.
For 24VDC output use 28VAC with 175VA power rating or higher.
Caution: Do not apply voltages above 28VAC (28 VAC is maximum input rating)
+ DC -
12VDC/24VDC @ 5 amps continuous power limited output.
AC FAIL
Used to notify loss of AC power, e.g. connect to audible device or alarm
N.C., C, N.O.
NC, C, NO panel. Relay normally energized when AC power is present.
Contact rating 1 amp @ 120VAC / 28VDC
Low Battery
Used to indicate low battery condition, e.g. connect to alarm panel.
N.C., C, N.O.
NC, NO, C Relay normally energized when DC power is present.
Contact rating 1 amp @ 120VAC / 28VDC.
Low battery threshold:
12VDC output threshold set @ approximately 10.5VDC,
24VDC output threshold set @ approximately 21VDC.
+ BAT -
Stand-by battery connections. Maximum charge rate .5 amp.
WI1340B 12/05
This helps avoid potential
LED DIAGNOSTICS
Power Supply Status
Function/Description
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