Where are relays connected?
The COM (Common) connection of a relay is the part of the relay that moves. When a relay is off, the COMMON is connected to the NC (Normally Closed). The NO (Normally Open) connection of the relay is not connected until the relay turns on. When the relay turns on, the COMMON move from NC to NO.
How does a relay switch work?
A relay is an electrically operated switch. They commonly use an electromagnet (coil) to operate their internal mechanical switching mechanism (contacts). When a relay contact is open, this will switch power ON for a circuit when the coil is activated.
How do you hook up a 12V relay?
How to Wire a 12V Relay
- Connect wires to the coil of your relay.
- Connect the “common” (C) terminal of the relay to a battery supply.
- Connect the power input lead from the equipment you want to operate with the relay to the “normally open” (NO) terminal of the relay.
When to use a relay?
A Relay is generally used when it is required to control a circuit by a separate low-power signal, or when several circuits must be controlled by one signal. They are classified into many types, a standard and generally used relay is made up of electromagnets which in general used as a switch.
How are electromagnets used in a relay switch?
A relay is an electromagnetic switch used to switch High Voltage or Current using low power circuits . For example, we can use it for controlling home appliances with a normal low voltage electronic circuit. Electromagnetic relays uses an electromagnet to operate a switching mechanism mechanically. It also provides isolation between low power circuit and high power circuits.
How are switches and relays work?
Switches are generally used to close or open the circuit manually .Relay is also a switch that connects or disconnects two circuits. But instead of manual operation a relay is applied with electrical signal, which in turn connects or disconnects another circuit. Relays can be of different types like electromechanical, solid state.
What is a relay switching circuit?
So relay is a switch which controls (open and close) circuits electromechanically . The main operation of this device is to make or break contact with the help of a signal without any human involvement in order to switch it ON or OFF. It is mainly used to control a high powered circuit using a low power signal.