Relay DC (Normally Close And Normally Open)

 

Electromechanical relay is a device that is operated based on variations of the input, to control other devices connected to the output relays. Relay serves to disconnect or drain electric current which is controlled by providing a supply voltage to the coil. There are two types of relays based on voltage to drive the coil, the relay DC and AC relay. In this circuit using a relay with a voltage of 6 volts DC. These contacts can be used to control a larger current in the circuit. The main function of the relay is to control a larger current in the circuit with a small stream that passes through the relay coil. At symbols above consists of a coil and two sets of contacts, one of which is open (Normally Open or NO), and the other closed (Normally Close or NC). When there is the supply voltage on the relay coil, then the NO contact will be connected and NC contacts will open. Conversely when there is no supply on coil relay NO contact then re-open and re-connect the NC contacts.