In alarm systems, what role does a transformer serve?

In alarm systems, a transformer primarily serves the purpose of voltage regulation. Transformers are used to convert higher voltage from the mains supply down to a lower voltage level suitable for the operation of alarm systems and their components. This regulation ensures that the devices receive a stable and appropriate voltage, which is crucial for their proper functioning and longevity.

Using a transformer can prevent devices from being subjected to high voltage that could cause damage, as well as provide a level of filtration that can reduce electrical noise. However, the main function here is to adjust the voltage to what the alarm system requires, enabling reliable operation without the risk of over-voltage. This controlled output voltage is essential for the efficient and safe operation of sensors and sirens, along with other components in an alarm system.