SilentKnight SK-FFT - Manual (Page 14)

SK-FFT Installation and Operation Manual
2-4 54711
2.4 Electrical Specifications
2.4.1 Power Requirements
Voltage for the SK-FFT must be a power-limited, filtered, non resettable nominal 24
VDC source. The voltage source must be within the range of 17-29 VDC.
2.4.2 Current Ratings
Maximum current ratings for determining backup battery requirements for alarm
(active) and standby conditions over the input voltage range of 17-29 VDC are shown
in Table 2-2.
Table 2-1: Electrical Ratings
Circuits Voltage Current
SLC Circuits 32 V 150 mA
Audio Circuits 17 V 53 mA
Table 2-2: SK-FFT Current Draw
Active Standby
SK-FFT 230 mA 120 mA
FFT-24 25 mA 10 mA