Master 3Pin Socket Wire Cable With Interlocking Relay Socket/Wiring Harnesses- 2 set 30 A Three Pin Socket

12V 3 PIN RELAY WITH HARNESS SOCKET Relay is an electrical control device that usually used in automatic control circuit.it functions as automatic adjustment, security protection and conversion circuit. APPLICATIONS This relay can be used in automotive setups, car sound systems, security systems, and various other applications. INSTRUCTIONS -85: Connected to the ground chassis. Serves as the common ground connection to activate and magnetize the internal coil. -86: Connected to a positive input 12V DC input. This is where a switch connected to a 12V DC input will be connected to on the relay. When power is sent to the relay through pin 86, the circuit is completed with pin 85 connected to a common ground, which activates and magnetizes the internal coil. -87a: Normally closed contact, also known as NC. In the case which the internal coil is not activated or not magnetized, pin 87a is closed and connected to pin 30, which pin 30 can be connected to either a 12V DC positive input or to the ground chassis. -87: Normally open contact, also known as NO. The connection between pin 87 and pin 30 is only made when the internal coil is activated or magnetized, which pin 30 can be connected to either a 12V DC positive input or to the ground chassis. -30: Common contact which can be connected to a 12V DC power input or to the ground chassis depending on the desired application. Pin 30 is always connected with pin 87a until the coil is magnetized, which pin 30 then becomes connected with pin 87. PACKAGE 1 relay + 1 relay socket with wires