H-S81-HS Installation & Operation Manual — P/N LS10114-000HI-E:A 2/24/2015 27
Section 2: Parts of the H-S81-HS System
This chapter provides a detailed description of all the parts making up the H-S81-HS system.
2.1 Power Supply Set
The H-S81-HS control panel can be equipped with the following power supply sets:
• S81-PU001 power supply set for base plate installation.
• S81-PU002 power supply set for rack installation.
2.1.1 S81-PU001 Power Supply Set
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 sup-
ply 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 condi-
tions, a simplified test is carried out every 30 seconds in order to check the proper presence of the
batteries. A full test, instead, 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 sup-
ply unit will signal a battery fault. In case of primary power supply failure, the system will shut bat-
teries 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
NOTE: The power supply set S81-PU002, for rack installation, can only be used in the version
with ground-floor steelwork.
Figure 2.1 S81-PU001 Power Supply Set
• 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 (5x20)
• 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)
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