Understanding the 5 Pin Relay Wiring Diagram Fan is crucial for anyone looking to control a fan using a relay. This diagram provides the blueprint for safely and effectively integrating a relay into your fan's electrical circuit, allowing for remote operation or control by other devices.
What is a 5 Pin Relay Wiring Diagram Fan and How it Works
A 5 Pin Relay Wiring Diagram Fan illustrates how a five-terminal relay is connected to a fan and its power source. Relays act as electrically operated switches. In the context of a fan, a relay allows a low-voltage signal (like from a thermostat or a switch) to control a higher-voltage circuit that powers the fan motor. This is incredibly useful for isolating control circuits from power circuits, enhancing safety and simplifying complex wiring.
The typical components involved in a 5 Pin Relay Wiring Diagram Fan include:
- The 5-pin relay itself.
- The fan motor.
- A power source (e.g., battery or mains power).
- A control switch or device (e.g., thermostat, timer, button).
The relay has five terminals: two for the coil (which activates the switch) and three for the switch contacts. These switch contacts typically consist of a common terminal, a normally open (NO) terminal, and a normally closed (NC) terminal. For a fan application, we primarily use the common and normally open terminals to turn the fan ON. The importance of understanding this wiring lies in preventing electrical damage and ensuring personal safety.
Here's a breakdown of the terminals and their roles in a 5 Pin Relay Wiring Diagram Fan:
| Terminal Number | Function | Connection (Typical Fan Setup) |
|---|---|---|
| 85 | Coil - Negative/Ground | Connects to the negative side of the control circuit's power source (often ground). |
| 86 | Coil - Positive | Connects to the positive side of the control circuit's power source. This is where the control signal is applied to energize the coil. |
| 30 | Common (C) | Connects to the positive side of the fan's main power source. |
| 87 | Normally Open (NO) | Connects to the positive input of the fan motor. When the relay is activated, this terminal connects to terminal 30, powering the fan. |
| 87a | Normally Closed (NC) | Typically not used in a basic fan ON/OFF setup, but could be used for other control strategies. |
When the control switch is activated, it sends power to the relay's coil (terminals 85 and 86). This magnetic field causes the switch contacts to move. In a 5 Pin Relay Wiring Diagram Fan scenario, the common terminal (30) then connects to the normally open terminal (87), completing the circuit to the fan motor and turning it on. When the control signal is removed, the coil de-energizes, and the switch returns to its normal position, disconnecting power to the fan.
Here's a simplified sequence of operation:
- A control signal is sent to the relay coil.
- The relay coil energizes.
- The internal switch within the relay moves.
- The common contact (30) connects to the normally open contact (87).
- Power flows from the main power source, through the relay, to the fan motor.
- The fan turns ON.
You can find detailed examples and specific diagrams by referring to the resources provided in the next section.