NAPCO NP-P7ASUP Features
DESCRIPTION
The NP-P7ASUP is both a charger and a supervised power
limited supply that converts a low voltage AC input into a
12VDC or 24VDC power limited output, with 7A of continu-
ous supply current.
FEATURES
•
12VDC or 24VDC selectable output.
•
Maximum charge current .5 amps.
•
7 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
(zero voltage drop).
•
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 50mm(H)
Specified at 25° C ambient.
INSTALLATION INSTRUCTIONS
The NP-P7ASUP should be installed in accordance with The
National Electrical Code and all applicable Local Regulations.
1. Mount the NP-P7ASUP in desired location.
2. Set the NP-P7ASUP 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 con-
necting devices. This helps avoid potential damage.
5. When the use of stand-by batteries are desired, they must
be lead acid or gel type.
Connect battery to terminals marked [+ BAT -] on the board
(battery leads included).
Use two (2) 12VDC batteries connected in series 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.].
R
333 Bayview Avenue
Amityville, New York 11701
For Sales and Repairs, (800) 645-9445
For Technical Service, (800) 645-9440
NP-P7ASUP
7 AMP SUPERVISED
POWER SUPPLY / CHARGER
WI1341B 12/05
© NAPCO 2005
Red
(DC)
Green
(AC)
Power Supply Status
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.
LED DIAGNOSTICS
VOLTAGE OUTPUT/TRANSFORMER SELECTION TABLE
Output
VDC
Switch
Position
Transformer
Requirements
12VDC @ 7 Amps
continuous supply current
1. ON
2. OFF
NP-TRF28175
24VDC @ 7 Amps
continuous supply current
1. ON
2. ON
NP-TRF28300
Note: Transformers with higher VA ratings may be used for all output
voltages above as long as you do not exceed 28VAC.
TERMINAL IDENTIFICATION
Terminal
Legend
Function/Description
AC/AC
Low voltage AC input (see voltage output/transformer selection table).
For 12VDC output use 28VAC or higher with 175VA power rating or higher.
For 24VDC output use 28VAC with 300VA power rating or higher.
Caution: Do not apply voltages above 28VAC (28VAC is maximum input rating)
+ DC -
12VDC/24VDC @ 7 amps continuous power limited output.
AC FAIL
N.C., C, N.O.
Used to notify loss of AC power, e.g. connect to audible device or alarm
NC, C, NO panel. Relay normally energized when AC power is present.
Contact rating 1 amp @ 120VAC / 28VDC
Low Battery
N.C., C, N.O.
Used to indicate low battery condition, e.g. connect to alarm panel.
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.