Other Gadgets: With regards to the process complexity, the FACP may well acquire signals from other devices like h2o move switches in sprinkler systems. The difference between an FACP and annunciator panel is always that FACP is the main control unit with the fire alarm system, although annunciator panel is https://www.firesense.co.uk/type/conventional-fire-system/conventional-fire-alarm-control-panels/