There are four basic types of panels: coded panels, conventional panels, addressable panels, and multiplex systems." The panel may also supply electrical energy to operate any associated sensor, control, transmitter, or relay. The panel receives information from environmental sensors designed to detect changes associated with fire, monitors their operational integrity and provides for automatic control of equipment, and transmission of information necessary to prepare the facility for fire based on a predetermined sequence. "A Fire Alarm Control Panel (FACP), or Fire Alarm Control Unit (FACU), is the controlling component of a Fire Alarm System. The vector stencils library Initiation and annunciation contains 9 symbols of Fire Alarm Control Panel (FACP) or Fire Alarm Control Unit (FACU) elements, triggering devices, audible alarm systems, timers, security control equipment, and recording devices.
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