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Brand New. Stored in anti-static wrapper. Date Code: 2305 The Simplex 637-162 is a Power Supply Board or PC Board for a Power Supply specifically designed for use in Simplex fire alarm systems. It is a critical component of the power supply that provides the electrical power to the entire fire alarm control panel, which in turn houses the logic and circuits (including NACs) that control the "signal system." Function: It is a power supply board. In fire alarm systems, power supplies are crucial for providing the necessary operating voltage to the various components of the system, including the main control panel, annunciators, notification appliances, and initiating devices.
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