Carmel sensors offer microprocessor based fire alarm panel. The features of this alarm panel are: Modular construction; battery back-up with built-in-charging; error free fire/fault status in unambiguous coloured led indication; relay output for actuators; lamp test facility; compatible to all types of conventional detectors; optional loop service; optional rs 232 commuication facility and optional rs 485 communication facility for remote annunciation panel. The panel requires 24 volt dc for operation with an operating current around 80 ma plus 4.2 ma per zone. Its operating conditions are -10 degree to 45 degree celsius.