A 4 pin relay switch is an electronic device that allows you to remotely control electrical circuits by using a low-power signal. It’s a common component in many electrical systems and can be used in a variety of applications, including automotive, marine, and residential systems.
Understanding the Basic Components of a 4 Pin Relay Switch
Before we dive into the wiring diagram for a 4 pin relay switch, it’s important to understand the basic components of the device. These components include:
- Coil: This is the part of the relay that creates a magnetic field when it receives an electrical current. The magnetic field is used to close or open the relay’s contacts.
- Contacts: These are the parts of the relay that connect or disconnect the electrical circuits. They can be Normally Open (NO), Normally Closed (NC), or changeover contacts (CO).
- Terminals: These are the points on the relay where you connect the wires.
Now that you understand the basic components of a 4 pin relay switch, let’s move on to the wiring diagram.
Wiring Diagram for a 4 Pin Relay Switch
The wiring diagram for a 4 pin relay switch is relatively simple. Here’s what it looks like:
| Pin | Description | Wire Color |
|---|---|---|
| 30 | Battery Power | Red (or Orange) |
| 85 | Ground | Black (or Brown) |
| 86 | Trigger | Green (or Blue) |
| 87 | Output | Yellow (or White) |
Pin 30 is connected to the positive terminal of the battery, while Pin 85 is connected to ground. Pin 86 is connected to the trigger signal, which could come from a switch, sensor, or other electronic device. Finally, Pin 87 is the output that connects to the electrical circuit you want to control.
Here’s an example of how you might use a 4 pin relay switch in a car:
In this example, the 4 pin relay switch is used to control the headlights. When you turn on the headlights, the switch sends a signal to the relay, which closes the contacts and allows power to flow to the headlights. When you turn off the headlights, the switch sends a signal to the relay, which opens the contacts and cuts off power to the headlights.
FAQ: Common Questions about 4 Pin Relay Switch Wiring Diagrams
What is a relay switch used for?
A relay switch is an electronic device that allows you to remotely control electrical circuits by using a low-power signal. It’s commonly used in various automotive, marine, and residential systems.
How does a 4 pin relay switch work?
When a 4 pin relay switch receives an electrical current on Pin 86, the coil creates a magnetic field that closes the contacts on Pin 87. When the current on Pin 86 is turned off, the coil de-energizes and the contacts on Pin 87 return to their default state.
What is Pin 30 on a relay switch?
Pin 30 is the contact that is connected to the positive terminal of the battery. It’s used to provide power to the relay switch and the electrical circuit that the switch controls.
What is Pin 85 on a relay switch?
Pin 85 is the contact that is connected to ground. It’s used to complete the circuit and provide a return path for the electrical current.
What is Pin 86 on a relay switch?
Pin 86 is the contact that is connected to the trigger signal. When this contact receives an electrical current, the coil creates a magnetic field that closes the contacts on Pin 87.
What is Pin 87 on a relay switch?
Pin 87 is the contact that is connected to the electrical circuit you want to control. When the coil creates a magnetic field, the contacts on Pin 87 close, allowing power to flow to the circuit. When the coil de-energizes, the contacts on Pin 87 return to their default state.
Conclusion
In summary, a 4 pin relay switch is a simple yet effective electronic device that allows you to remotely control electrical circuits. By understanding the basic components and wiring diagram, you can easily incorporate a 4 pin relay switch into your electrical system. If you have any questions or concerns, feel free to consult the FAQ section or seek assistance from a qualified professional.
