Hi, I’m Hus. In this video we’ll connect a stop-start circuit using the Control Circuit Pracbox. Let’s get started.

Before we start connecting the circuit, let’s look at our circuit diagram. So in this circuit we have an emergency stop. We’ll use the normally closed contact. We have our stop push button, which will also be the normally closed contact. The start push button, which will be a normally open contact. The contactor coil. One of the contacts of the contactor we’ll use as our hold-in. Another contact we’ll use to turn on the pilot lamp.

So for this circuit, we will use this emergency stop, this stop-start button. So we’ll use this as our stop button. This is our start button. We’ll use this contact, and we’ll use this green pilot lamp to indicate that the contactor has turned on. Let’s now connect the circuit.

To connect the circuit, we’ll go from active to terminal 11 of our emergency stop. From terminal 12, we’ll go to terminal 11 of our stop push button. And from our stop push button terminal 12, we’ll go to terminal 13 of our start push button. We’ll use this power supply between L1 and neutral. From L1, we’ll go to terminal 11 of our emergency stop. From terminal 12 of the emergency stop, we’ll go to terminal 11 of our stop push button. From terminal 12 of our stop push button, we’ll go to terminal 13 of our start push button. From terminal 14 of our start push button we’ll go to A1 of our contactor coil. And then from A2, we’ll finish the circuit to the neutral of the power supply. From terminal 14 of our start push button, we’ll go to A1 of our contactor coil. And from A2, we’ll go back to neutral.

Just to see if we’ve connected this correctly, I’m going to do a quick test. Let’s now create the holding circuit.

To create the holding circuit, we’ll go from terminal 13 of our start push button to one of the normally open contacts. And then from the other side of the normally open contact, we’ll connect our terminal 14 of the start push button. So from terminal 13, we’ll go to one of the normally open contacts. The other side of the normally open contact will connect terminal 14 of our start push button. Now let’s see if our circuit works so far.

So now we can see that our contactor is holding in, so our holding circuit is working. Let’s now connect the pilot lamp to one of the normally open contacts of the contactor. Now we’ll connect our terminal 12 of emergency stop to one of the normally open contacts of the contactor. On the other side of the normally open contact, we’ll connect that to the pilot lamp. And then from the pilot lamp, we’ll go back to neutral. So the terminal 12 of our emergency stop will go to a normally open contact. From the other side of the normally open contact, now we can’t access it directly because we’ve put a thermal overload there, but we’re not considering this thermal overload for this circuit, so we’re going from the other side of that normally open contact to the pilot lamp. And then from the pilot lamp we’re finishing the circuit to the neutral. Now let’s see how our circuit works.

When we turn that on, our pilot lamp comes on. Stop button works as well. Let’s see if the fail-safe works. So if I turn our start button on, and if our power line is disconnected, the contactor de-energizes. Let’s start it again. If E-stop is pressed, it also de-energizes. If the stop wire is disconnected, our contactor de-energizes.

I hope you enjoyed this video of stop-start circuit using contactors in the Control Circuit Pracbox. In my next video, I will do the same circuit operations using the Zelio programmable relay. If you have any questions or feedback, please feel free to contact us. Thanks for watching.