12v Relay Working Pdf

When power flows through the first circuit 1 it activates the electromagnet brown generating a magnetic field blue that attracts a contact red and activates the second circuit 2.

12v relay working pdf.

12 volt wiring diagram best 12v relay pin 5 and roc grp org in. A normally open relay will switch power on for a circuit when the coil is activated. Hvac fan relay wiring diagram download. In this article the basics of a relay like energized relay and de energized relay are explained in detail.

5 pin relay 5 pin relays provide 2 pins 85 86 to control the coil and 3 pins 30 87 87a which switch power between two circuits. Relays are often grouped together or with other components like fuses or placed by themselves. As soon as the control circuit is active the armature is pulled in opens the break contact 87a and switches over to the make contact 87. A normally closed relay will switch power off for a circuit when the coil is activated.

Relay position identification relay fuse block covers usually label the location and position of each fuse relay or fuse. In general the point of a relay is to use a small amount of power in the electromagnet coming say from a small dashboard switch or a low power electronic circuit to move an armature that is able to switch a much larger amount of power for example you might want the electromagnet to energize using 5 volts and 50 milliamps 250 milliwatts while the armature can support 120v ac at 2. 5 pack 12v waterproof relay harness set joyho 12 volt 5 pin 40 30 amp spdt bosch style automotive relays with heavy duty 16awg 14awg tinned copper wires 4 8 out of 5 stars 10 16 99 16. How change over relays work a change over relay operates on the same principle as a make relay.

The voltmeter will indicate source voltage 12v. The only difference is that the armature is connected to a second alternative output 87a when released. What is a relay. Here are two simple animations illustrating how relays use one circuit to switch on a second circuit.

Best bosch relay wiring diagram 5 pole electrical outlet symbol 2018. A relay is essentially a switch that is operated electrically rather than mechanically.