Boxed Power Supply – EN54-Approved

A fire alarm system requires a robust power supply to ensure the safe continuity of fire detection. The Technoswitch EN54-4 certified range of power supplies have additional performance features built in that most others fail to provide. These features not only ensure that the PSUs provide reliable power when needed, but also continuously monitor total performance.


  • 5A, 3A and 5A units, all EN54-4 & CPR Certified
  • Microprocessor controlled operation and protection
  • On-demand battery charging and load output current sharing
  • Automatic output reconnection after short circuit fault
  • No user-serviceable fuses, outputs protected by electronic E-fuses
  • Two independent switched outputs with programmable (jumper selectable) control inputs
  • Onboard or remote temperature sensing (jumper selectable) with optional remote sensor
  • Separate AC healthy, battery fault and power supply fault outputs
  • Three fault outputs, AC Power Fail, Battery Fault, PSU Fault
  • Form A, normally closed floating relay fault outputs
  • Four LED status display
  • Over-voltage output protection
  • Battery-free option selected by a jumper
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Download the Data Sheet for Technical Specifications and Ordering Information.

DP-PSUEN1.5 EN54 24(27.6)VDC 1.5 Amp PSU, Space for 2x 7Ah batteries
DP-PSUEN3-S EN54 24(27.6)VDC 3.0 Amp PSU, Space for 2x 7Ah batteries
DP-PSUEN3-L EN54 24(27.6)VDC 3.0 Amp PSU, Space for 2x 17Ah batteries
DP-PSUEN5 EN54 24(27.6)VDC 5.0 Amp PSU, Space for 2x 17Ah batteries
DP-TEMP-SK Temperature Sensor Kit
DP-TEMP-EC Temperature Sensor Extension Cable 250mm



EN54-Approved PSU Range Datasheet



DP-PSUEN Series Installation & Operation Manual

Battery Calculators

PSU Battery Calculator

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