TQ4-5V

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Signal relays are devices that provide electrical isolation between two circuits and can both open and close an electrical connection in response to signals from a control device such as a computer, a microcontroller, or a switch. The TQ4-5V is a signal relay with a maximum current rating of 2 Amps that is commonly used in industrial and commercial processes that require an electrically isolated interface.

The TQ4-5V is designed to operate in either normally open (NO) or normally closed (NC) modes. In the NO mode the relay will open the electrical circuit when it is activated. In the NC mode the relay will close the circuit when it is activated. In both cases the relay is triggered by a 5V signal from the control device.

The TQ4-5V is designed with a built-in opto-coupler that isolates the control device from the relay, allowing it to control the circuit without the risk of electrical shock or interference from other electrical components. The opto-coupler is a light-emitting diode (LED) encased in a transparent plastic housing that produces an electrical signal when it is exposed to light. The LED is connected to a phototransistor that is sensitive to light. When the LED is illuminated, the phototransistor produces a voltage that triggers the relay.

The TQ4-5V also has a built-in protection circuit that prevents overvoltage and short-circuiting of the relay. The protection circuit monitors the voltage being applied to the relay and will shut off if the voltage rises above the maximum voltage rating of the relay. This protects the relay from damage and also prevents any electrical fire from occurring.

The TQ4-5V is used in a variety of industrial and commercial applications including, but not limited to, elevator controls, access control systems, motor control systems, lighting systems, security systems, and HVAC systems. The relay is designed to be easy to install and is typically mounted on a standard DIN rail.

The TQ4-5V is an invaluable resource for any electrical system that requires an electrically isolated interface and has a maximum current rating of 2 Amps. Its built-in protection circuit, opto-coupler, and versatile mounting make it an ideal choice for any application that requires reliable operation.

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