The S408 is an EN54-4 Approved, universal input switching power supply capable of delivering a full 240W of continuous power for fire alarm systems.

Suitable for charging a range of sealed lead acid batteries from 7Ah to 38Ah, the S408 power supply features complete monitoring of primary and secondary power sources with fully temperature compensated battery charging and battery high impedance monitoring.

The S408 power supplies are available as chassis only units or mounted in a range of enclosures suitable for various sizes of battery.

Main features

  • Continuous 8A load output while charging fully depleted batteries
  • Charges up to 45Ah batteries
  • Approved to EN54-4
  • 94V to 253V AC input
  • Mains fail monitoring with LED indication and output
  • Battery disconnection monitoring with LED indication and output
  • Low battery monitoring with LED indication and output
  • Earth fault monitoring with LED indication and output
  • Low battery cut out
  • Temperature compensated battery charging


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