1
PSB1002435
PSB 27,6V/3,5A enclosed switch
mode buffer power supply
Edition: 1 z from 10.11.2011
Supercedes edition: ………………..
EN
Features of the power supply:
•
DC 27,6V/3,5A uninterruptible power supply
•
wide AC input voltage range 176÷264V
•
high efficiency 83%
•
controlling of battery charging and maintaining
•
protecting of battery against excessive
discharging (UVP)
•
battery charging current 0,5A/1A,
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 3A + 0,5A battery charging.
2. Output current of 2,5A + 1A battery charging.
Total device c battery: 3,5A 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
0,90A@230VAC max.
Supply power
100W max.
Efficiency
83%
Output voltage
27,6V DC – buffer operation
19V÷27,6V DC – battery operation
Output current
3A + 0,5A battery charging
2,5A + 1A battery charging
Output current t
AMB
<30°C
3A + 0,5A battery charging - refer to graph 1 .
2,5 A + 1A battery charging - refer to graph 1.
Output current t
AMB
=40°C
2A + 0,5A battery charging - refer to graph 1 .
1,5 A + 1A battery charging - refer to graph 1.
Voltage adjustment range
24÷28V DC
Ripple voltage
150mV p-p max.
Battery charging current
0,5A or 1A 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
