4 Pin Relay Wiring Diagram vs 5 Pin Relay Wiring Diagram
The benefits of using a negative trigger wire on a 5 pin relay would be - one less power wire going to the relay, and not needing a power wire feeding your switch. This may be beneficial depending on what type of accessories you are wiring into your car or truck. You could use this method for a radiator fan, fuel pump, headlights fog lights, spot lights, LED lights and probably hundreds of other uses. How to wire a relay with a negative switch
Why use a relay instead of a switch? Pin 30 + Pin 86 - Connect them both together to a fused 12V power source. Pin 87 - Sends power out to your accessory. Pin 85 - Connect to the switch, with the other side of the switch going to ground. Pin 30 - Incoming 12v to the relay from the battery (fused) Pin 86 - incoming 12v to the relay from the battery (fused) - Tied in with Pin 30 Pin 87 - Outgoing power from the relay to the electric accessory (lights, pump, fans, etc) Pin 85 - Negative trigger wire to turn on the relay. Should be connected to a switch. The other side of the switch should connect to a ground. Pin 87a - Empty
The Main Difference between 4 or 5 Pin Relays
A 4 pin relay controls a single circuit, whereas a 5 pin relay switches power between two circuits.
4 Pin Relay
2 pins (85 & 86) control the coil and 2 pins (30 & 87) switch power on a single circuit in a 4 pin relay. Four-pin relays are available in two configurations: normally open and normally closed. When the coil is activated, a normally open relay turns on the power to a circuit. When the coil is activated, a normally closed relay turns off the power to the circuit.
5 Pin Relay
5 pin relays have two pins (85 & 86) for controlling the coil and three pins (30, 87 & 87A) for switching power between two circuits. They have connection pins that are both normally open and normally closed. Power is switched from the normally closed pin to the normally open pin when the coil is activated.
4 Pin Relay Wiring Diagram
The diagram of a four-pin relay is depicted in the image below. This circuit diagram will be used later to wire a relay for driving lights.
4 Pin Relay Wiring Diagram
You'll need to use a fuse to connect the relay's Pin 30 to the 12V battery for driving lights. We're not directly connecting pin 30 to the battery here; instead, we're using a fuse. This is because the fuse protects us from overcurrents.
If there is a fault in the driving light circuit, the fuse protects the burning of lights and other circuits from current overshoots.
Pin 85 of the relay is grounded, while Pins 87 and 86 are switching pins. You can turn on the main beams of the driving light using this 4 pin relay by switching the battery connections to either circuit connected with pin 86 or 87 of the relay.
Sample Wiring Diagrams for a 4 Pin Normally Open Relay
Sample Wiring Diagrams for a Normally Open Relay
Example 1. 4 pin (normally open) relay with the switch on the control circuit's positive side.
Example 2. 4 pin (normally open) relay with the switch on the control circuit's negative side.
Note: These circuits have been simplified to demonstrate the function of a relay and thus do not include the fuse protection that would be required. Relay coil terminals have no polarity unless the relay coil is protected by a diode (inside the relay), in which case the coil terminal wired to the diode's anode must be connected to negative.
5 Pin Relay Wiring Diagram
A pin relay is SPDT relay, which means that the contacts of relay single pole double throw. In single pole double throw relay, we have one pin is common, 2nd are normally close and 3rd are normally open. Two pins for the coil. This relay can be used for different types of controlling or switching. Such as for lights, fan, fuel pump, etc. Here I showed the 5 pin relay wiring diagram.
5 pin relay wiring diagram
In the diagram above, I've depicted a single pole double throw relay (5 pin relay). Not that his relay can be 5 volts DCV, 12 volts DCV, 24 volts DCV, and so on, depending on the coil's ratting voltage. In the above 5 pin relay diagram, pins 1 and 2 are for the coil, pin 3 is the common pin, pin 4 is normally closed, and pin 5 is normally open.
How to Use 5 Pin Relay
A relay can be used for a variety of switching purposes. If you want to control electrical devices automatically, a relay is the best option. When we talk about relays, as I previously stated, there are various types of relays for various applications. This post, however, is about the 5 pin relay. As illustrated by the 5 pin relay diagram. This has three main pins. As opposed to a single pole double throw.
So when we say single pole double throw, we mean that it has a common point as well as two other points (NC and NO).
To switch something from a single pole double throw relay, you must use the common and other points. For example, if you require that the light bulb be turned off when the relay operates. Then you must use a common, normally closed pin. If you want to turn on the light bulb, you must use the common and normally open pins. I've shown how to wire a 5 pin relay for lights in this article.
5 Pin Relay Wiring Diagram for lights
In the 5 pin relay wiring diagram below, I show how to turn on lights when the relay is activated and how to turn them off when the relay is deactivated.
Similarly, if you want to control or wire a fan with a relay, you can use the same method. It is important to note that the ratted voltage must be applied to the relay coil. If your relay is powered by 12 volts DCV. Then you must supply the 12-volt DCV.
Comments
Post a Comment