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3.2 Technical output.
The PSU module is equipped with indication outputs allowing transmitting the information of the absence of AC
supply.
•
Cx-NCx-NOx: AC supply absence output
: -relay output indicates the absence of AC supply.
Under normal status, with the AC supply on, the C1-NO1 and C2-NO2 contacts are closed and in the case of AC
supply loss, the PSU module will switch over C1-NC1 and C2-NC2 contacts.
4. Handling and operation.
4.1 Overload or short-circuits to the PSU module output.
The AUX output of the PSU module is equipped with the PTC polymer fuse assisted protection. If the load
of the PSU module exceeds 2,5A (load 110% ÷ 150% @25ºC of the PSU module power), the output voltage is
automatically disconnected and this is indicated by the green diode going off. The voltage at the output may be
restored by disconnecting the output load for the period of about one minute.
In the case of the short-circuit to the AUX, BAT output, (load 200% ÷ 250% of the PSU module power) or
incorrect connection of the battery, the fuse F in the battery circuit becomes permanently damaged and the
restoration of the voltage at the BAT output requires the replacement of the fuse.
4.2 Battery assisted operation.
In the case of power failure, in the unit will instantly switch to the battery assisted operation. In order to
activate the operation of the PSU from the battery itself, connect the BAT connectors in accordance with the
indications: +BAT red to ‘plus’ and, -BAT black to 'minus’ of the battery and press START button during [5s].
Turning off the power supply module – pressing STOP button on the module panel
The PSU is equipped with the discharged battery disconnection system (UVP).
4.3 Maintenance.
Any and all maintenance operations may be performed following the disconnection of the PSU module from
the power supply network. The PSU module does not require performing any specific maintenance measures,
however, in the case of significant dust rate, its interior is recommended to be cleaned with compressed air. In the
case of fuse replacement, only the substitutes in conformity to the original ones are allowed.
