A 24VDC relay is a vital component in many electrical and automation systems. It is a type of electromagnetic switch that uses a 24V direct current (DC) to control a circuit by opening or closing contacts. Relays serve as an intermediary between low-voltage control circuits and higher voltage power circuits. This article will explore the basic principles, components, and applications of 24VDC relays, shedding light on their role in modern electrical systems.

Working Principle of a 24VDC Relay At its core, a 24VDC relay consists of a coil, contacts, and an armature. When a 24VDC voltage is applied across the coil, it creates a magnetic field. This magnetic field then attracts or repels an armature, which is mechanically linked to one or more electrical contacts. These contacts are typically either normally open (NO) or normally closed (NC), and they control the flow of electrical current through a circuit. Normally Open Contacts (NO)： In their default state, these contacts do not allow electrical current to flow. When the relay is activated, the magnetic field causes the contacts to close, enabling the current to pass through.