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1. Technical description:
The stabilized power supply unit is designed to supply equipment demanding stabilized voltage of 12V
DC (~11,0V÷15,0V DC).
•
the 3 line stabilizing systems (voltage regulators ) incorporated in the unit provides voltage
with less noise and shorter time of fault response, when compared to a pulse regulator.
•
the unit has 9 outputs separately fused with F 500mA cut-outs. Failure (short
circuit/overloading) in the circuit of any outputs will result in blowing the fuse element and
disconnecting the faulty circuit from the other ones.
•
the outputs has arranged into 3 groups (sections). The A, B, C sections has independent
voltage regulator (adjust the voltage)
Voltage presence across the outputs of the power supply unit is indicated by LEDs lighting at the unit
front panel Ax, Bx, Cx ; x:{1,2,3}. The output voltage is preset at the production stage, to 12V. For
installation with considerable voltage drops on resistance of the wires incoming to the consumers, it is
possible to adjust the voltage level with assembly potentiometer (~11,0V÷15,0V DC).
The power supply unit has been designed according to the EU EMC and LVD requirements
2. Installation:
The buffer power supply unit is to be assembled by a qualified installer, holding the relevant
certificates, required and necessary in the particular country for connecting (interfering with) the 230 V
AC systems and low-voltage installations.
Prior to beginning the installation, the power supply load balance needs to be prepared. In the normal
course of operation, the sum of currents used up by the consumers may not exceed ∑ I
Because the power supply unit is designed for the continuous operation and is not equipped with
ON/OFF switch, the power supply line should have the appropriate overload protection. The user
should be informed hot to disconnect the power supply unit from the mains (usually be means of the
separate fuse in the fuse-box).
The power supply installation should conform to the applicable standards and law.
1. Before installation make sure that the mains 230 V is disconnected.
2. Install the power supply at the selected place and evacuate connection wires.
3. Remove the main fuse protecting the transformer primary circuit [8].
4. Connect the supply conductors ~230V to the terminals of the transformer (AC 230 V). The earthing
conductor should be connected to the terminal marked with the grounding symbol. Three-wire cable
should be used for the connection (the protective conductor in green-and-yellow).
The power conductors should be connected to the appropriate terminals on board and properly
insulated.
Particular care must be taken when making the electric shock protection circuit:
yellow-green protection conductor of the power cable must be connected from one
side to the clamp marked
the power supply unit without correctly installed and technically functional electric
shock protection circuit is NOT ALLOWED!
This can lead to damage to the equipment and poses risk of electric shock.
5. Connect the conductors of the consumers to terminals Ax, Bx, Cx and GND (x:{1,2,3} ) of the
connection block on the power supply unit board [11].
inside the housing of the power supply unit. Operation of
= 3,0A
MAX
.
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