Pulsar PS-251220 User manual

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PS-251220
PS 12V/2A enclosed switch mode power supply
PL
Edition: 7 from 01.03.2018
Supersedes edition: 6 from 03.06.2016 EN
Features of the power supply unit:
power output 2A/12÷15V DC*
wide AC input voltage range 85-264V
high efficiency 74%
LED optical signalisation
protections:
SCP short-circuit protection
overvoltage OVP
overvoltage protection
overload (OLP)
warranty –2 year from the production date
1. Technical description.
1.1.General description.
The power supply unit is intended for the feeding of alarm system equipments, which require 12V DC supply
voltage and current load I=2A. The design enables simple changing of the output voltage, within the range of
12V÷15V DC, using a potentiometer. The power supply unit is protected against short-circuit, overload and overvoltage.
1.2. Technical parameters.
Supply voltage
85 ÷ 264V AC
Current consumption
0,18A@230V AC max.
Supply power
25W max.
Efficiency
74%
Output voltage
12V DC
Output current tAMB<30°C
2A - see graph 1.
Output current tAMB=40°C
1,4A -see graph 1.
Voltage adjustment range
12V ÷ 15V DC
Ripple voltage
100mV p-p max.
Short-circuit protection SCP
electronic, automatic recovery
Overload protection OLP
105 ÷ 150% of power supply, automatic recovery
Surge protection
varistors
Overvoltage protection OVP
>16V (automatic return)
Optical signalisation
green LED –presence of DC voltage
Operation conditions
2-nd enviromental class, temperature: -10oC ÷+40oC
relative humidity 20%...90%, without condensation
Dimensions
L=110, W=78, H=36 [+/- 2mm]
Net/gross weight
0,22kg / 0,24kg
Protection class PN-EN 60950-1:2007
I (first) –requires a protective conductor (PE)
Connectors
power-supply: Φ0,63-2,50 (AWG 22-10)
outputs: Φ0,63-2,50 (AWG 22-10)
Electrical strength of insulation:
- between input (network) circuit and output circuits of
power-supply (I/PO/P)
- between input circuit and PE protection circuit (I/P-
FG)
- between output circuit and PE protection circuit
(O/P-FG)
3000 V/AC min.
1500 V/AC min.
500 V/AC min.
Insulation resistance:
- between input circuit and output or protection circuit
100 MΩ, 500V/DC
Storage temperature
-20ºC...+60ºC
Vibrations and impulse waves during transport
according to PN-83/T-42106
* In order to extend the life of the power supply, the load current of 1,4A is recommended.
*See graph 1.

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1.3. Output current vs temperature.
Graph 1.
Allowable output current from the power supply
depending on ambient temperature
(instantaneous load).
2. Installation.
2.1. Requirements.
The power supply shall be mounted by the qualified installer having appropriate (required and necessary for a
given country) permissions and qualifications for connecting (operating) low-voltage installations. The unit shall be
mounted in closed rooms, according to the environment class II, of the normal air humidity (RH=90% max. without
condensation) and the temperature within the range from -10°C to +40°C.
The power supply shall be mounted in a close casing (a cubicle, a terminal device) and in order to fulfill LVD and
EMC requirements the rules for power-supply, encasing and shielding shall be observed according to application.
Due to the power supply design, the PE wire has to be connected to the corresponding connector of the
supply unit. Operation without proper grounding of the power supply is not allowed!
2.2. Installation procedure.
1. Prior to installation of the power supply unit, make sure that power leads have been disconnected from the
230VAC mains.
2. Install the unit in the previously selected place.
3. Connect the 230VAC power leads. Connect the PE cable (yellow-green) to an appropriate terminal on the
power supply unit (marked with ).
The circuit of the shock protection shall be performed with a particular care, i.e. the yellow and green
protection wire of the power cable shall be connected from one side to the terminal marked by the
symbol of in the casing of the power-supply. Operation of the power-supply without the properly
made and fully operational circuit of the shock protection is
UNACCEPTABLE!
It can result in failure of devices and electric shock.
4. Connect load/loads to proper output connectors of the power supply (positive end is marked as +V,
negative end as -V).
5. Upon the completion of tests and trial activation, close the housing, cabinet etc.
2.3. Description of terminal.
Elements/connectors [Fig.1]
Description
L, N,
L-N - input voltage connectors 230V AC,
–protective conductor connector
-V
Power supply output (0V)
+V
Power supply output (+12V)
LED1
LED signals the presence of voltage at the unit’s
output
Fig.1. Description of terminal.
ADJ
Potentiometer - output voltage adjust

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2.4. Dimensions and fitting of the PS-251220 power supply.
Fig. 2. Dimensions of power supply.
3. Maintenance.
All maintenance procedures can be performed after the disconnection of the power supply from the electrical grid.
The power supply does not require any special maintenance procedures, but in the case of significant dust accumulation,
dusting using compressed air is recommended.

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WEEE designation
The waste electric and electronic equipment worn out may not be disposed of together
with standard household waste. According to the WEEE directive, applicable in the EU, the
separate neutralization methods should be used for electric and electronic equipment.
Pulsar sp. j.
Siedlec 150, 32-744 Łapczyca, Poland
Tel. [phone], Fax. [phone]
e-mail: [e-mail], [e-mail]
http:// www.pulsar.pl, www.zasilacze.pl