Intelligent Auxiliary Power Supply (MIR2 Series)

The SIGA-APS is a switch-mode auxiliary power supply designed to provide additional power for audio components and external Notification Appliance Circuits (NACs). The power supply monitors the AC line, performs ground fault testing, and charges batteries (up to 10 Ah). The SIGA-APS also provides a smooth and uninterrupted transition to batteries in the event of an AC power loss. 

All trouble conditions detected by the SIGA-APS are transmitted to the fire alarm control panel through its connection to the Signature Data Circuit (SDC), eliminating the need for additional devices. All connections intended to leave the cabinet are fully protected against direct and induced transient voltage conditions.



  • AC Input voltage
  • SIGA-APS 120 Vac @ 300 W maximum, 50/60 Hz
  • Maximum wire size 12 AWG (2.5 mm2)
  • Output voltage:  Nominal rating 24 Vdc @ 6.75 A total
  • Output circuits: Two power-limited circuits rated at 24 Vdc @ 3.2 A each
  • Maximum wire size 12 AWG (2.5 mm2)
  • Charge current 1.0 A
  • Charge capacity 10 Ah
  • Personality Code 03 (Emulates SIGA-CT2)
  • Maximum wire size 14 AWG (1.5 mm2)
  • Environmental Conditions
  • Temperature range 32 to 120 °F (0 to 49 °C)


Note: Addressing requires two (2) module addresses.


Intelligent Auxiliary Power Supply (MIR2 Series)
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  • Item #: SIGA-APS
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Price $1,050.00

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