24V 3A Encased Switch Mode PSU to EN54-4/A2



  • A powerful switch mode/digital hybrid PSU that can be customised to suit your exact requirements - see More Information tab for details.
  • Plastic cover on PSU PCB guards against touching live parts (to VDE 0100-410).
  • Includes the same electronics as our BF562-3 LPCB/VDS certified EN54-4/A2 boxed 24V 3A PSU.
  • Metal base plate facilitates straightforward mounting inside third-party OEM enclosures.
  • Includes a single-pole volt-free changeover relay that switches for any fault condition.
  • Includes a fault type & hazardous voltages present LED. 
  • Two selectable battery charge currents.
  • Battery fault impedance limits can be optimised to suit load current (helps extend battery life)*.
  • Mains fail simulation mode.
  • Improved on-board temperature sensor with optional remote sensor.
  • Electronic functions comply with EN50131-6 grades 1-4 for security applications.


More details

By buying this product you can collect up to 21 loyalty points. Your cart will total 21 points that can be converted into a voucher of $4.20.

By buying this product you can collect up to 21 loyalty points. Your cart will total 21 points that can be converted into a voucher of $4.20.

More Information


The BF562-3/E can be optionally customised to suit your exact requirements using a BF423 configurator and PC. Configurable parameters include Float voltage temperature compensation; Battery charge rate (mA); Battery impedance; Input/Output settings. 

PSU STATUS LED (located on the PSU PCB)

1 flash = Mains Failure.

2 flashes = Battery Voltage Low.

3 flashes = Battery Voltage Critical.

4 flashes = Charger Failure.

5 flashes = Charger OK (Battery is either actively charging, or in float charge).

6 flashes = No Batteries Fitted (indicating DIP Switch 4 position).

7 flashes = Battery Resistance Fault (Level set by DIP Switch 2 position).

8 flashes = Output Over Voltage.


The BF562-3/E monitors battery resistance to the requirements of EN54-4/A2. The fault threshold is directly related to the ability of the battery to deliver the rated current to the load. For example, batteries stored uncharged for long periods, during shipment and/or distribution, degrade leading to increased internal resistance. If a degraded battery is fitted, a fault will be shown by the PSU as mandated by EN54-4/A2.


Data on the BF563-3/E's status can be extracted from the PSU's bi-directional data port. The data available includes thermistor measurements; battery terminal voltage; system voltage at load terminals; battery charge current; load current; battery impedance and ASCII text string status messages. Extracting this data requires additional equipment and permissions - contact C-TEC for details.

Technical Specifications

Approvals/certifications Includes the same electronics as our EN54-4/A2 certified BF562-3 PSU
Compatibility *** Full compliance with all relevant standards must be checked by the responsible person with the caged PSU installed in a suitable enclosure ***
Application/operation An encased Mains to regulated DC switch-mode/digital hybrid power supply providing 3A @ 24V DC. It includes a single pole volt-free changeover relay that switches for any fault condition. User customisable via a BF423 Configurator.
Mains supply 230V 50/60Hz.
Mains rated current 800mA r.m.s.
Total output current limited to 3A (Max. output current).
Output I max.a: 2.6A or 2A selectable. A load greater than I max.a will temporarily reduce batt. charging. I.max.b: 3A, charging turned off via CONN6. Output is also customisable via a BF423 Configurator*.
Battery charge capacity 2.5Ah up to 17Ah (battery charged to 80% capacity in 24hrs). Output is customisable via a BF423 Configurator to suit different manufacturers' batteries*.
Max battery size and type Up to 17Ah VRLA dependent on the size of the enclosure the BF562-3/E is mounted in.
Indicators Supply Present (Green); General Fault (Amber); Auxiliary Fault (Amber); Hazardous Voltages Present (Red).
Connections Mains Input (CONN1); Supply Output (CONN3); Battery Input (CONN3); Fault Relay (CONN4); Charge Off Input (CONN5). Battery Charge Current Link (PLK1); Battery Monitoring On/Off Link (PLK2); High Temp. Output (PL2).
Expansion connections A remote thermistor can be connected via PL3 terminals.
Product dimensions (mm) 143mm H x 173mm W x 66mm D.
Construction & finish Zintec base, polycarbonate cover.
IP Rating Dependent on mounting enclosure.
Weight 665g (without batteries).
Operating conditions/temperature -5ºC to +40ºC. Max relative humidity: 95%.
Notes *Parameters configurable via a BF423 configurator are: Float voltage temp. compensation; Batt. charge rate (mA); Batt. impedance; Configurable Input/Output settings.


5 Series PSUs DoC

Declaration of Conformity (EMC/LVD) DOC0000076 Rev2

Download (1.29M)

15 other products in the same category: