Fire Alarm Control Panel 08
Fire Alarm Control Panel 08 : Addressable Fire Alarm Control Panels: (1) Signaling Line Circuits: Addressable Fire Alarm Control Panels employ one or more Signaling Line Circuits, slang - usually referred to as loops or SLC loops - ranging between one and thirty. Depending on the protocol used, a Signaling Line Circuit can monitor and control several hundred devices. Some protocols permit any mix of detectors and input/output modules, while other protocols have 50% of channel capacity restricted to detectors/sensors and 50% restricted to input/output modules. Each SLC polls the devices connected, which can number from a few devices to several hundred, depending on the manufacturer. Large systems may have multiple Signaling Line Circuits. Each device on a SLC has its own address, and so the panel knows the state of each individual device connected to it. Common addressable input (initiating) devices include: Smoke detectors; Heat Detectors (Rate of Rise and Fixed Temperature); Manual call points or manual pull stations; Notification appliances (Simplex systems with TrueAlert signals only); Responders; Fire sprinkler system inputs; Switches; Flow control; Pressure; Isolate; Standard switches; Addressable output devices are known as relays and include; (Warning System/Bell) Relays; Door Holder Relays; Auxiliary (Control Function) Relays. Relays are used to control a variety of functions such as: Switching fans on or off; Closing/opening doors; Activating fire suppression systems; Activating notification appliances; Shutting down industrial equipment; Recalling elevators to a safe exit floor; Activating another fire alarm panel or communicator
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