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EN54 48V 7A 1U

Article Number: 1U01R10048P070-EN54
E-number: 5213557

EN54-4 Certified / SBF110:8 Approved battery backup 48 V, 7 (A) Ampere.

The EN54 series is mainly used to operate external alarm devices in fire alarms where an SBF110:8 approved or EN54-4 certified battery backup is required. The EN54 family of battery backups has high flexibility, advanced alarm features, long spare operating times and high load handling. The EN54 has intelligent charging which means that when the batteries are fully charged, they will be put in electronic standby mode for up to 20 days or when the battery voltage has reached 53.4 V. By discharging the batteries in a controlled way and recharging them cyclically (instead of not using them), the service life is extended by up to 50%. The batteries automatically connect in less than 50 microseconds, if needed. The battery backup also performs battery tests to be able to notify when batteries need to be replaced. To maintain certificates, UPLUS 10+ Design Life AGM batteries shall be used. The display shows information about the system’s:

  • Voltage: Minimum, medium and maximum voltage.
  • Power: Minimum, medium, and maximum current.
  • Temperature: Minimum, medium and maximum temperatures.
  • Uptime in the event of a power failure.

For connection of batteries we recommend Battery Shelf floor which has room for four 150 Ah front terminal batteries and Battery Panel 48V for connection of batteries to battery backup. Mounting: 19″ rack. Installation and Deployment: Fixed Installation. Battery types: UPLUS 10+ Design Life AGM batteries. Battery shelves: One to four battery shelves with room for four 150 Ah batteries on each battery shelf, or floor battery shelf. Typical uses:

  • External alarm devices
  • Spoken evacuation alarm
Recommended environment

Security class (IP-klass)

Recommended mounting

19" rack, Adjustable19" consoles enable mounting in 250 mm stand

Dimensioner (Höjd x Bredd x Djup)

44 x 444 x 280 mm

Height units


Net weight


Built in cooling fan


Voltage in (V)

230 – 240 VAC, 50-60 Hz

Current out

54.6 VDC (48 V)

Max current

Available charging current (A)

Dependent upon power outlet

Rated power

336 W

Ripple i normal mode

150 mVp-p


heat generation at 50% / 80% of rated power

31 W / 49 W

Current in (A)

1.8 A

Number of unsecured (load-) outputs

Type of fuse / ouput

1 10 A (panel mounted fuses)

Deep discharge of battery occurs at

41 VDC

Battery type

12 V maintenance free AGM battery

Battery capacity

Protection against

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Alarm via

Changeover relay / RS-485

Alarm functions

Battery disconnected (10 sec), Charger error overvoltage, Charger error undervoltage, Delayed power grid failure alarm (10 sec), Fuse failure, Low battery voltage, Old battery

Number of alarm outputs

3 in the rear of the enclosure

Information via display

Highest / lowest battery voltage since start, Highest / lowest temperature since start, Min-/Max-/Average current since start, Min/Max/Average voltage since start, Possible operating time in event of power outage, Setting of alarm levels possible

Support for communication via

RS-485, RS-485/OSDP

Information via protocol

Alarm for high / low temperature, Alarm from temperature sensor, All standard alarm functions, Forced battery test, Highest and lowest battery voltage since start, Highest and lowest temperature since start, Minimum / Max / Average temperature the latest hour / 72 hours, Minimum / Max / Average voltage the latest / 1 hour / 24 hours / 72 hours, Minimum / Max / Average voltage the latest 1 hour / 72 hours, Operational time in event of power outage, Possibility to set alarm levels

Tamper switch


Lockable enclosure


Number of optional cards that can be placed

No optional card mounting possible

In-stock article


Normal dlivery time

Guarantee period

5 years (special warranty conditions apply)

Warranty conditions 5 year warranty

Average load shall not exceed 80 % of power supply's rated capacity-, Battery backup shall be used together with UPLUS 10+ Design Life batteries., Surrounding temperature shall not exceed 32°C., The fan shall be cleaned annually and replaced if needed.

Certified in accordance with

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Certificate number (SBSC)


Product meets requirements in accordance with

CE directive in accordance with:765/2008, EMC Directive 2014/30EU, Emission: EN61000-6-:2001, EN55022:1998:-A1:2000, A2:2003 Class B, EN61000-3-2:2001, Immunity: EN61000-6-2:2005, EN61000-4-2, -3, 4, -5, -6, -11, Low voltage directive: 2014/35/EU


Milleteknik AB

Country of origin


All specifications subject to change in event of product changes or incorrect data

Product Files



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