How to control Fan from different locations with PLC (Zelio Smart Relay)

Many times we need to control a single electrical machine from different location, means we can make the Fan (for example) from three different locations.

We can do this with the help of PLC, Smart Relay. I am using Zelio Smart Relay, SR3B261B.

Open the ZelioSoft2 and select for Ladder programming.

Select the Input from the option and click on input and drag it to the input place as shown in the below picture.

Double click on Input-1 and give a name to it “Start-1”, and continue for other inputs, Input-2, Input-3, as well as shown in the below pictures.

Now, you have three Inputs, as Start-1, Start-2, and Start-3.

Now take three more inputs, Input-4, Input-5, and Input-6 and connect them in series mode.

Right click on the Input-4 and select “Normally closed” to make it NC. And do the same for other two inputs and give names to Inputs 4, 5, 6 as Close-1, 2, 3 respectively.

Select an Output from the Menu and put it to Coil. That is our output.

Select ‘Contact’ of output Q1 and drag it to the 004 in parallel to 003, for interlocking.

Now your program is ready. Now we will simulate this. For simulation click on the “S” button.

Now Run the Program by clicking on ‘Run’ icon.

Click on ‘Start-1’, however you can click on any Start button, Output will become ON (Red). It means programming is working fine.

To make the output OFF click on ‘Stop-1’, however, you can click on any Stop button, output should be OFF.

Since, our requirement is that Fan should be ON from any Start button and OFF by any Stop button.

You can check various combinations also.

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