Power Supply – EN54-Approved Range

A fire alarm system power supply must be robust to ensure the safe continuity of fire detection. The Technoswitch EN54-4 certified power supply range provides reliable power when needed and continuously monitors total performance.

All power supplies are fitted with two independently protected AUX1 and AUX2 outputs, which provide a voltage of 24 V DC (±15%) and total current output of either 3 A or 5 A model dependent.

The power supplies will automatically switch to battery power in case of power loss, providing an uninterrupted power source.

The power supplies are housed in a metal enclosure (colour red RAL 3001) with space for two 12 V maintenance-free lead acid batteries. Battery sizes accommodated are either 7 Ah or 17 Ah model dependent.

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Download the Data Sheet for Technical Specifications and Ordering Information.

DP-PSUEN3-S EN54 24(27.6)VDC 3.0 Amp PSU, Space for 2x 7Ah batteries – Small Red Enclosure
DP-PSUEN3-L EN54 24(27.6)VDC 3.0 Amp PSU, Space for 2x 17Ah batteries – Large Red Enclosure
DP-PSUEN5 EN54 24(27.6)VDC 5.0 Amp PSU, Space for 2x 17Ah batteries, Red Enclosure



DP-PSUEN Red PSU Range Datasheet


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DP-PSUEN Red Power Supply Range Manual

Battery Calculators

PSU Battery Calculator