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PSBEN3024C
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2. Technical description.
2.1. General description.
The buffer power supply has been designed in accordance with the requirements of the PN-EN 50131-6
standard, grade 1÷3 and II environmental class. It is intended for an uninterrupted supply to alarm system devices
requiring stabilized voltage of 24V/DC (+/-15%).
Depending on a required protection level of the alarm system in the installation place, the PSU efficiency
and the battery charging current ought to be measured as follows:
* Grade 1, 2 - standby time 12h
Output voltage 1,4A + 1,5A battery charge
** Grade 3 - standby time 30h if the faults of the main power source are reported to the Alarm Receiving
Centre - ARC (in accordance with 9.2 – PN-EN 50131-1).
Output voltage 0,56A + 1,5A battery charge
- standby time 60h if the faults of the main power source are reported to the Alarm Receiving
Centre - ARC (in accordance with 9.2 – PN-EN 50131-1).
Output voltage 0,28A + 1,5A battery charge
*** General use – if the PSU is not mounted within an installation which is PN-EN-50131 compliant, the
acceptable current efficiency amounts to:
1. Output voltage 3A + 0,2A battery charge
2. Output voltage 2,6A + 0,6A battery charge
3. Output voltage 2,2A + 1A battery charge
4. Output voltage 1,7A + 1,5A battery charge
Total current of the rec battery: 3,2A max.
.
In case of power decay, a battery back-up is activated immediately. The PSU is housed in a metal
enclosure (colour: RAL 9005 - black) which can accommodate a 2x17Ah/12V battery. It features micro switches
that indicate unwanted door opening (faceplate) and detaching from the mounting surface.
2.2. Block diagram.
The PSU has been manufactured based on a high-duty system of DC/DC converter. It features a
microprocessor-based operation control, responsible for full diagnostics of the PSU and battery parameters.
Fig. 1. Block diagram of the PSU.
