DC UPS SR500C – 500W

Standalone & Rack Mount Battery Charger with Communications

Helios Power Solutions No-Break ™ DC UPS technology represents a truly unique, comprehensive approach to providing uninterruptible and secure DC power when you need it.

No-Break ™ DC UPS systems maximise the integrity of standby battery installations, whilst optimising the life and availability of back up batteries.  They are now available with Serial and Ethernet Communications options.

The No-Break ™ system is the ideal solution for:

  • Critical systems of 100W to 750W (and above using parallel operation)
  • Applications requiring continuous on-line monitoring of battery and charger status
  • Providing cost-effective management of your battery system investment

Other features include:

  • Ability to view power supply data remotely
  • Automatic or manually initiated battery condition testing to ensure availability of standby power
  • The battery condition test feature of the No-Break ™ DC system determines the condition of the back-up batteries and will provide an early warning of potential failure. This gives plant operators enough warning to replace the faulty batteries before they are required, like in the event of a mains power failure. Battery condition tests are mandatory on some fire alarm systems and are now commonly specified by consultants for critical industrial systems.


 Model Output (V)  PSU Rated (A) Power (W)
SR500C12 13.8 36 500
SR500C24 27.6 18 500
SR500C30 34.5 14.5 500
SR500C36 41.4 12 500
SR500C48 55.2 9 500


Input 180V – 264VAC
Frecuency 45-65Hz
Fusing 5A input fuse and varistor
Battery fuse plus ECB for battery circuit
Overcurrent protection Constant current limit under overload and short circuit conditions
Isolation 1KV DC input – output / earth
Efficiency > 85%
Voltage adj. range 85 – 105% of Vout
Temp. compensation Temperature sensor on 1.7m lead with adhesive pad:  -4mV / °C / cell ±10%
Hold-up time 20 ms without battery (nominal – max. Vin)
Alarms Mains fail (or PSU in standby mode)
Battery System OK –  alarms when battery voltage low (on mains fail) , battery missing, battery circuit wiring faulty, BCT fail (if enabled)
Alarm  relay contacts C – NO – NC full changeover rated 1A /50V DC, 32VAC
AC Input Connector IEC320 inlet socket
DC connections M8 brass stud or plug-in/ screw terminal block
Alarm connections Plug in screw terminal block
Dimensions 225W x 304D x 70H mm (excluding mounting feet and terminals)

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