TN2-L-H-5V

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Signal Relays, Up to 2 Amps

A signal relay, like the TN2-L-H-5V, is an electromechanical device that allows the activation, deactivation, and control of electrical signals. Its applications and working principles are best understood starting with the basic terms and components. It is a component of many different types of electronic, electrical, and industrial control systems.

Terminology

A relay is an electromagnetic device that can sense an electrical signal and operate a switch or trigger an output. A contact is a contact point on the relay that can open or close an electrical path. The contact point can be normally open (NO) or normally closed (NC). An armature is an electromagnet that is part of the relay and is activated by an electrical current. A coil is another name for the armature, actuating an electrical circuit in response to electrical control signals.

Components

The components of the TN2-L-H-5V signal relay include the armature or coil, a set of contacts, and a mounting bracket. There is also an external coil which is connected to the external supply and to the armature of the relay. The environment in which the relay is located also plays a role in the operation of the relay.

Application Fields

Signal relays are used in a variety of electronic and electrical applications in both commercial and residential settings. Commonly, they are used to route power or control signals to circuits, switching them on and off as required. Signal relays also find use in computers, touch screens, automation systems, appliances, industrial control systems, and various safety systems.

Working Principle

When the input voltage is applied to the external coil, it creates an electromagnetic field around the coil. The generated field, in turn, pulls the armature downward, which then opens or closes the points of contact. Depending on the design, the contact points can either open or close the electrical circuit. When the input voltage is removed, the armature returns to its original position due to its spring, and the contact points resume their original states. In this way, the signal relay can act as an electronically-controlled switch.

Conclusion

The TN2-L-H-5V signal relay is an essential device used in many modern applications. Through its simple design and electromagnetic working principle, it enables the control of electrical signals to automated and electronic systems. As one of the most commonly used types of relays, it finds applications in residential and commercial settings, in computers, touch screens, industrial control systems, and more.

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