1
PSB1552455
PSB 27,6V/5,5A enclosed switch
mode buffer power supply
Edition: 1 z from 17.11.2011
Supercedes edition: ………………..
EN
Features of the power supply:
•
DC 27,6V/5,5A uninterruptible power supply
•
wide AC input voltage range 176÷264V
•
high efficiency 84%
•
controlling of battery charging and maintaining
•
protecting of battery against excessive
discharging (UVP)
•
battery charging current 0,5A/2A,
changed by jumper
•
battery output is full protected against short-
circuit and reverse connection
•
LED optical signalisation
•
protections:
•
SCP short-circuit protection
•
OVP overvoltage protection
•
overvoltage protection (output AC)
•
overload (OLP)
1. Technical description.
1.1. General description.
Buffer-type power supply units are intended for continuous power supply to devices that require stabilised voltage
of 24 V DC (+/-15%). The power supply provides a voltage of U=27,6 V DC with an output current of:
1. Output current of 5A + 0,5A battery charging.
2. Output current of 3,5A + 2A battery charging.
Total device c battery: 5,5A max.
In case of power voltage decay, prompt switching to battery supply occurs. The power supply has the following
protections: short-circuit (SCP), overload (OLP), and overvoltage (OVP).
1.2. Technical parameters.
Supply voltage
176÷264V AC 50÷60Hz
Current consumption
1,4A@230VAC max.
Supply power
155W max.
Efficiency
84%
Output voltage
27,6V DC – buffer operation
19V÷27,6V DC – battery operation
Output current
5,0A + 0,5A battery charging
3,5A + 2A battery charging
Output current t
AMB
<30°C
5A + 0,5A battery charging - refer to graph 1 .
3,5 A + 2A battery charging - refer to graph 1.
Output current t
AMB
=40°C
3,3 A + 0,5A battery charging - refer to grap h 1.
1,8 A + 2A battery charging - refer to graph 1.
Voltage adjustment range
24÷28V DC
Ripple voltage
150mV p-p max.
Battery charging current
0,5A max. or 2A max.
Short-circuit protection SCP
electronic
Overload protection (battery) OLP
polymer fuse (PTC)
Overvoltage protection OVP
U>115% ÷ 150% of the output voltage, isolation of the
output voltage, atomatic recovery
Excessive discharge protection UVP
U<19 V (± 5%) – disconnection of battery
Optical signalisation
green LED- presence of AC voltage
Output of optical signalization
LED AC- presence of AC voltage
LED DC- presence of DC voltage on power supply output
Operation conditions
2-nd enviromental class, temperature: -10
o
C÷40
o
C
relative humidity 20%...90%, without condensation
Dimensions (LxWxH)
199 x110 x 50 [mm]
