The device has 2 DC power supply outputs, and each one is equipped with an individual fuse. The IP42 of the housing allows indoor installation. When the AC grid is normal, the AC grid provide power supply for the load directly through the inter-device mutual mapping equipment, and the charger. The SPS range of EN54-4 certified safety power supplies offer a compact, robust and versatile power solution to installers, allowing them to safely power fire detection and signalling systems in small to large installations. These increasingly intelligent systems rely upon a stable. Fire legislation in many countries now states any power supply performing a mandatory function of a fire alarm system must be approved to EN54-4. Products are widely used in engineering. An Automatic Transfer Switch (ATS) is the device that seamlessly switches critical loads from the normal supply to the emergency supply when a power failure occurs.
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