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1. Technical description:
Buffer power supply unit is designed for the uninterrupted supply of equipment requiring the stabilized voltage of
12V(-/+ 15%). The linear stabilizing system incorporated in the power supply unit provides voltage with less noise
and shorter time of fault response, when compared to a pulse stabilizer. The supply unit provides the voltage
Uout= 12,8V÷13,8V DC and the output current of Imax=1A. In case of power voltage failure, the battery supply is
automatically switched on.
The battery is't protected from the excessive discharge.
The power supply unit is designed in accordance with the EMC and LVD Directives of European Union.
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 Imax=1A and the battery
charging current may not exceed Iacc.
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 [9].
4. Connect the supply conductors ~230V to the terminals of the transformer AC 230 V [8]. 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 bard 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
inside the housing of the power supply unit. Operation of 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 OUT '+' and '-' of the connection block on the power
supply unit board [6].
6. Switch on the power supply 230V AC and insert the network fuse protecting the primary circuit of the transformer
[9]. Check the optical signalling of the power supply unit operation
The output voltage of the unloaded power supply unit is ~13,8V DC.
During battery charging, the voltage may be anywhere between ~12,8V÷13,8V DC.
7 .Connect the battery in accordance with the indications [7] (colours).
8. Perform the power supply unit test: optical signalling [4] [5]
- disconnecting the 230V AC power supply: optical signalling
9. Following installing and checking the correctness of operation of the power supply, the enclosure may be closed.
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