User Instructions
1
PSB-1554828
PSB 54V/2,8A enclosed switch
mode buffer power supply
PL
Edition: 2 z from 01.03.2018
Supercedes edition: 1 z from 01.08.2015
EN**
Features of the power supply:
DC 54V/2,8A uninterruptible power supply*
wide AC input voltage range 176÷264V
high efficiency 86%
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:
short-circuit protection SCP
over voltage protection OVP
surge protection (AC input)
overload protection OLP
warranty – 2 year from the production date
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 48V DC (+/-15%). The power supply provides a voltage of U=54V DC with an output current of:
1. Output current of 2,3A + 0,5A battery charging.*
2. Output current of 1,8A + 1A battery charging.*
Total device current + battery: 2,8A max.
*
In case of power voltage decay, prompt switching to battery supply occurs. The power supply unit is protected
against a short circuit, an overload, a surge or over voltage protection.
1.2. Technical parameters.
Supply voltage
176÷264V AC
Current consumption
1,4A@230VAC max.
Supply power
155W max.
Efficiency
86%
Output voltage
44V÷ 54V DC – buffer operation
38V÷ 54V DC – battery operation
Output current t
AMB
<30°C
2,3A + 0,5A battery charging - see chart 1
1,8A + 1A battery charging - see chart 1
Output current t
AMB
=40°C
1,5A + 0,5A battery charging - see chart 1
1A + 1A battery charging - see chart 1
Voltage adjustment range
48÷56V DC
Ripple voltage
150mV p-p max.
Battery charging current
0,5A or 1A max
Short-circuit protection SCP
electronic
Overload protection (battery) OLP
glass fuse
Surge protection
varistors
Overvoltage protection OVP
U>115% ÷ 150% output voltage - disconnecting supply
output automatic return
Excessive discharge protection UVP
U<38V (± 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
*
See chart 1