How To Wire And Test A 5 Pin Relay?

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A 5 pin relay is an electrical component that is used to control a circuit by opening and closing it with the help of an electromagnet.

It has five pins, usually numbered from 85 to 87 and 30. Pin 85 and 86 are the coil pins that are used to energize the coil and pin 30 is the common pin to which the load is connected.

Pin 87 and 87a are the switch pins that open and close the circuit when the coil is energized.

After buying a 5 pin relay, the next steps involve wiring and testing it.

Now sure of how to do it? Well, here is a perfect guide for you. We are going to discuss how to wire and test this pin relay.

How to Wire a 5 pin relay

Wiring of a relay is a process of connecting the pinouts to the corresponding wires.

The pins of the relay are marked with numbers and letters. We are going to look at all you should know when wiring this relay.

Tools you need

Here are the main tools that you will need for wiring the relay.

– Wire stripper

– Soldering iron

– Heat shrink tubing

– Electrical tape

– Test light

Steps

1. Determine the pinouts of the relay. The pinouts are typically labeled on the relay and it is important to make sure that you have the correct pinouts for the relay that you are wiring.
2. Strip the wire and solder the connections. Make sure to use the correct gauge wire for the connections.
3. Apply heat shrink tubing over the connections. This will help to protect the connections from corrosion and damage.
4. Test the connections with a test light. This will ensure that the connections are good and that the relay is working properly.
5. Secure the relay in place. Use electrical tape or other means to secure the relay in place.
6. Test the relay once again. Make sure that the relay is working properly before putting it into use.

5-pin Relay Wiring Diagram

Image source Electronics Hub

A relay wiring diagram is a diagram that shows the wiring of a relay switch. It shows the wiring between the relay switch and the components that it controls. It is a very useful tool for understanding how the relay switch works and for troubleshooting electrical problems.

The main wiring mechanism for a 5 pin relay is the changeover connection. This connection allows the relay switch to be connected to two different circuits at the same time.

The two circuits being connected by the changeover connection are called the Normally Open (NO) and Normally Closed (NC) contacts.

How to test a 5 Pin Relay? Complete Guide

Testing a 5-pin relay is an elaborate process that involves numerous steps. In most cases, you will use a digital multimeter to do the tests.

Usually, you will have to test each component of the relay separately before you come up with a conclusion.

We are going to look at each of these steps and what should be done at each stage. Step 1: Identify the 5 pins on the relay.

This can be done by using a multimeter to measure the resistance between the pins. The pins should be labeled as:

1- normally open,

2- common,

3- normally closed,

4- normally open and

5- ground.

Just identifying them is not enough. It will be prudent to know the functions of each pin. For example,

Pin 1 – Normally Open (NO) – This pin will be open when the relay is not energized.

Pin 2 – Common (COM) – This pin will be connected to either pin 1 or 3 when the relay is energized.

Pin 3 – Normally Closed (NC) – This pin will be connected to pin 2 when the relay is not energized.

Pin 4 – Normally Open (NO) – This pin will be connected to pin 2 when the relay is energized.

Pin 5 – Ground (GND) – This pin will be connected to the ground.

Step 2: Check the coil resistance of the relay. This is typically done by placing the leads of the multimeter on pins 1 and 5. The reading you get should be close to the resistance value specified in the relay’s datasheet. If the reading is significantly different, it could be an indication of a faulty relay.

Step 3: Test the continuity of the relay’s contacts. To do this, you need to use the multimeter in the continuity mode. Place the leads on each of the pins and press the button. You should hear a beep if the contacts are connected.

Step 4: Test the switching of the relay. This can be done by connecting the leads of the multimeter to pins 1 and 3. When the relay is energized, the switch should open and the multimeter should show a high resistance. When it is de-energized, the switch should close and the multimeter should show a low resistance.

Step 5: Test the current rating of the relay. This is typically done by connecting the relay to a power source and measuring the current draw. Make sure the current rating of the relay is within the range specified on the datasheet.

Step 6: Check the insulation resistance of the relay. This is typically done by placing the leads of the multimeter on pins 1 and 5. The reading should be higher than 1000 ohms. If it is lower, it indicates that the insulation of the relay is faulty.

These are the steps you need to follow to properly test a 5-pin relay. Make sure you take your time and double-check your readings to ensure accuracy.

How to test Pin Relay Coil’s using a digital multimeter

There are two ways to test the resistance of the relay coil:

1. Using a digital multimeter:

• Set the multimeter to measure resistance (or ohms).
• Connect the probes to the two pins of the relay coil.
• Read the resistance value on the display.

2. Using a continuity tester: • Connect the probes to the two pins of the relay coil. • If the coil is working, the continuity tester will beep.

Testing 5 pin relay’s various terminals

You have to test all the terminals of the relay to make sure that it is working correctly. The terminals that you have to test are:

-Normally open terminal

-Normally closed terminal

-Common terminal

Test the common terminal

To test the Normally open terminal, set your digital multimeter to the ohmmeter setting. Connect the negative lead of the multimeter to the common terminal, and the positive lead to the normally open terminal. Take note of the multimeter readings. The resistance should read in terms of the milliohms.

This is a sign that the terminal is working correctly. If the multimeter reads an open circuit, then the terminal is not working correctly.

Otherwise, if the multimeter records ‘zero’ then it means that the Normally open terminal is faulty.

How to test a Normally closed terminal

If there is no voltage passing through a normally closed terminal of a 5 pin relay, then it means that resistance between the COM and the terminal should be zero.

So, when testing, the value should be zero.

To carry out the test, set your digital multimeter to the ohmmeter setting. Connect the negative lead of the multimeter to the common terminal and the positive lead to the normally closed terminal.

Take note of the multimeter readings. If the multimeter reads ‘zero’ then it means that the Normally closed terminal is working correctly.

How to test a Common terminal

You can identify the common terminals on a 5 pin relay by the numbers 85 and 86. To test these terminals, start by setting your multimeter to resistance mode.

Next is to Connect the negative lead of the multimeter to one of the common terminals, and the positive lead to the other.

Take note of the multimeter readings. If the multimeter reads a resistance, then the Common terminal is working correctly.

If the multimeter reads an open circuit, then the Common terminal is not working correctly.

Are all 5 pin relays the same?

No, not all 5 pin relays are the same. There are different types of 5 pin relays, such as latching relays, automotive relays, and solid-state relays, that have different functions and characteristics.

The only common feature they all have is that they have five pins. In fact, you can manually check the number of pins a relay has by looking at its side or base.

How do I choose the best 5 pin relay?

When it comes to buying 5 pin relays in China, consider the following tips.

– Determine your current and voltage requirements.For example, if you need a 5 pin relay that can handle 24V at 10A, you will need to find a relay that is rated for at least this current and voltage.

-Consider the type of relay you need. The common types include electromechanical, solid-state, and reed relays.

-Consider the operating temperature of the relay. If you need the relay to operate in extreme temperatures, you may need to find a relay that has a higher temperature rating.

-Consider the size of the relay. If space is an issue, you may need to find a smaller relay to fit your application.

-Research the manufacturer. Make sure the manufacturer is reputable and has a good track record.

At ICRFQ, we will ensure that you get the right 5-pin relay for your application. We are a reputable sourcing agent for the electrical components in China and have access to the best quality relays from reliable and certified manufacturers.

Contact us today for assistance.

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