S81-PU001 (Power Supply Unit)

  • 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
  • Reference Standards: EN54-4
  • EC Reference standards: EN50081-2 & EN50082-2 (Industrial Environment)
  • Safety: EN60950 (CEI-74-2)