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EN54 24V 15A FLX M

Article Number: FM01P20024P150-EN54
E-number: 5213553

EN54-4 Certified / SBF110:8 Approved battery backup 24 V 15 (A) Ampere with space for two 20 Ah batteries. Available in battery boxes for up to 180Ah of battery capacity.

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. Battery backups in the EN54 series also perform battery tests to indicate when batteries need to be replaced. To maintain certificates, UPLUS 10+ Design Life AGM batteries shall be used. 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 26.7 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 alarm devices should be able to be controlled and monitored for possible interruptions on the loop. We therefore recommend the optional Fire module 4 outputs to complement the battery backup. Mounting: EN54 can be mounted on wall or in 19″ racks, reversible brackets included. Installation and Deployment: Fixed Installation. Battery types: UPLUS 10+ Design Life AGM batteries. Connectable battery boxes: One to four battery boxes with space for two 45Ah batteries in each battery box. Typical uses:

  • External alarm devices in fire alarms

Expected operating time in case of power failure:

Recommended environment

Security class (IP-klass)

Recommended mounting

19" rack, Wall

Dimensioner (Höjd x Bredd x Djup)

224 x 437 x 212 mm

Height units


Net weight

Number of cable ports

4, possible to have outlet holes on rear


Built in cooling fan


Voltage in (V)

230 – 240 VAC, 50-60 Hz

Current out

27.3 VDC (24 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)

2 A

Number of unsecured (load-) outputs

Type of fuse / ouput

2 15A flat pin fuses

Deep discharge of battery occurs at

21 VDC

Battery type

12 V maintenance free AGM battery

Recommended battery

2 UPLUS 12V 20Ah batteries

Batteries included


Protection against

, , , ,

Alarm via

Changeover relay

Alarm functions

Battery disconnected (10 sec), Charger error overvoltage, Charger error undervoltage, Delayed power grid failure alarm (10 sec), External alarm via pin list (optional card), Fuse failure, Low battery voltage, Low system voltage, Old battery

Number of alarm outputs


Support for communication via

RS-232, RS-485, RS-485/OSDP

Information via protocol

Alarm for high / low temperature, Alarm from temperature sensor, All standard alarm functions, Fan error, 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

Yes, two keys included.

Number of optional cards that can be placed

Three L-module option, Two 10 output modules or two Fire module 4 outputs

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

, , ,

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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