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AWZ333
7
Fig. 4. Uwy=f(Io) diagram.
2. Installation
2.1 Requirements
The buffer PSU is to be mounted by a qualified installer, holding relevant permits and licenses (applicable
and required for a given country) for 230V/AC interference and low-voltage installations. The unit should be
mounted in confined spaces, in accordance with the 1st environmental class, with normal relative humidity
(RH=90% maximum, without condensing) and temperature from +5°C to +40°C. The PSU shall work in a vertical
position that guarantees sufficient convectional air-flow through ventilating holes of the enclosure.
1. Output current 3A (without a battery)
2. Output current 2,6A + 0,4A battery charge
3. Output current 2,1A + 0,9A battery charge
Total current of the rec battery: 3 max.
As the PSU is designed for a continuous operation and is not equipped with a power-switch, therefore an
appropriate overload protection shall be guaranteed in the power supply circuit. Moreover, the user shall be
informed about the method of unplugging (usually through assigning an appropriate fuse in the fuse-box). The
electrical system shall follow valid standards and regulations..
2.2 Installation procedure
Before installation, make sure that the voltage in the 230V power-supply circuit is cut off.
1. Mount the PSU in a selected location and connect the wires.
2. Remove the line fuse that protects the primal circuit of the transformer.
3. Connect the power cables (~230V) to AC 230V clips of the transformer. Connect the ground wire to the clip
marked by the earth symbol PE. Use a three-core cable (with a yellow and green PE protection wire) to make the
connection. Lead the cables to the appropriate clips of the subplate through the insulating bushing.
The shock protection circuit shall be performed with a particular care, i.e. the yellow and
green wire coat of the power cable shall stick to one side of the ‘PE’ terminal - in the PSU
enclosure. Operation of the PSU without a properly made and fully operational shock
protection circuit is UNACCEPTABLE! It can cause a device failure or an electric shock.
4. Connect the receivers’ cables to the +AUX, -AUX connectors of the terminal block on the PSU board.
5. If necessary, connect the device (alarm panel, controller, indicator, etc.) conductors to the technical outputs:
-
BS
output - indicates 230V power failure
