How many power supplies for fire alarm controller?
This should be the case, and the two main power supplies should not be the same transformer circuit.
2 power supplies1 alternating current: two way AC power supply, using a two way power converter, one way power failure, the other can be powered immediately.2 DC is the battery installed in the host, 24VDC, the main power failure, the battery DC power can be provided to the fire engine power supply for some time.In practice, not much, generally a AC power supply (two municipal power supply is not much), as well as a standby battery (battery).
Yes, the 2 power supply is powered by two alternating current, using a two way power converter, one way off the power line, the other can be powered immediately.Direct current is the storage battery in the main engine. After 24VDC, the DC power of the battery can be supplied to the fire engine for a period of time after the main power has been cut off.
