This is a power supply set to be fitted on a base plate.
It consists of a maximum of 4 x 25 Watt power supply units, PU-A0005-1 model, plus one PU-A0004-1 battery charger module able to supply a 2 or 4 ampere adjustable battery charge current.
Power supply units are connected in parallel, up to a maximum of four units amounting to a total of 16 amperes.
Under normal operating conditions, a simplified test is carried out every 30 seconds in order to check the proper presence of the batteries.
A full test is carried out every hour in order to check electrical connections and battery efficiency.
During battery trickle charge, battery voltage is compensated automatically according to the temperature.
In case of mains voltage failure, batteries are automatically switched to the load without any interruptions.
Should the full charge stage exceed 24 hours, the power supply unit will signal a battery fault.
In case of primary power supply failure, the system will shut batteries down when the on-load voltage is lower than 18VDC in order to avoid damaging the batteries.
The set features three open collector outputs for replicating the various types of faults to the alarm control panel, along with a RS232 port for the connection to a supervisory system.
Technical Features
Input voltage: 110-240V~ (-15% – 10%)
Free-air operating temperature: -5 °C – 50 °C
Relative humidity: 93% non-condensing
Protection class: IP20
Nominal output voltage: 25VDC
Max. output current: 4A / 8A / 16A
Protections: Line fuse T6.3A H 250V (5×20)
Battery voltage: 26.2 to 28.7 VDC, compensated automatically
VBAT Ripple: < 100mV pK – pK at maximum current
Resistance to mains voltage dips: >=20mS at maximum current (with PU-A0005)
Maximum battery current: 4A
Protections: Over-voltage, short circuit and battery reverse polarity
