Illuminated Push button switch wiring help

[jseif099]

Purchased these switches to control my pump outlets:

eBay - New & used electronics, cars, apparel, collectibles, sporting goods & more at low prices

They are 1NO/1NC illuminated switches. Their are 6 terminal connections, 2 for illumination, 2 for NO and 2 for NC sides. I realize the x1-x2 connections are for the illumination and needs to be jumped.

I have wiring hooked up to terminals 13, and 14 which are the normally open contacts. The issue I have is only when I have my finger held on the pushbutton is the circuit closed allowing electricity to flow to the pump outlets. As soon as I depress or release the button it opens the circuit again. So did I buy the wrong kind of switch here? I imagined that when you depress the button and release it would switch the contacts to keep them closed, then when pressing the button in again it would keep them open to stop the flow.

 

[OneHoppyGuy]

The ad does not state whether it's a momentary switch or not (bad ad). Based on your description, it sounds at though that is what you were sold. What you need is a 'maintained' pushbutton.
In order to make that type of switch perform what you're looking for would require a relay wired correctly to keep the coil hot. Much simpler to just buy the right switch.
Here is what your'e looking for.

 

[day_trippr]

It's a momentary switch. Check out their web site description here...

Cheers!

 

[jseif099]

Roger that, I'll just order the proper ones from Automation direct. It does say moment in the ebay description but I can't for the life of me figure out who would want a push button switch that works like that.

 

[day_trippr]

Roger that, I'll just order the proper ones from Automation direct. It does say moment in the ebay description but I can't for the life of me figure out who would want a push button switch that works like that.

Someone wanting a blingy Start function...

Cheers!

 

[OneHoppyGuy]

Momentary switches are used for horns, buzzers, jogging and like I said, with a relay, they can be used like a maintained switch.

 

[microbusbrewery]

...but I can't for the life of me figure out who would want a push button switch that works like that.

I have one on my BCS controlled HERMS that I use to advance to the next state in my process. It's wired to a 5V DC supply so when I push the button it sends a 5V signal to an input on the BCS and triggers an exit condition. for example, it have a system pause for swapping hoses then I can push the momentary switch to trigger the state that starts recirculating my mash. So there are some practical uses for them, but definitely not in the scenario you were planning. That would be major finger cramping potential

 

[jseif099]

I just checked out your build microbus, very cool! I like how you've incorporated the momentary switch and also the dual carbon water filters addition to the stand, I may have to steal that :rockin:

 

[microbusbrewery]

I just checked out your build microbus, very cool! I like how you've incorporated the momentary switch and also the dual carbon water filters addition to the stand, I may have to steal that :rockin:

Thanks, I'm just glad I have some useful info out there. The water filter mounts have worked great so far. They're right there when I need them but at the same time they're not in the way.

 

[P-J]

Auber Instruments carries the correct one.
Illuminated Maintained Contact, Pushbutton Switch. 120/240V
And it's cheaper than the e-bay vendors.

Edit: AutomationDirect
Pushbutton, 22mm plastic, push ON - push OFF, incandescent illuminated

 

[veedubbin]

Anyone have a wiring diagram for a control panel for two pumps?

 

[P-J]

Anyone have a wiring diagram for a control panel for two pumps?

veedubbin,

I have made a couple hundred diagrams that I've posted on this forum. Most of them have 2 pumps.

What else are you trying to accomplish. A description would help a lot.

Congrats on your first post. Welcome to the forum.

P-J

 

[veedubbin]

Thanks for welcoming me P-J!
I have a March pump and a chugger pump that I would like to hard wire to a box. I dont need a temp control or anything, I just want to be able to turn the power on and run each pump separtely.

 

[rollinred]

Roger that, I'll just order the proper ones from Automation direct. It does say moment in the ebay description but I can't for the life of me figure out who would want a push button switch that works like that.

Your question was already answered but no one gave you the real reason why a momentary switch is used. Some gave you side uses but not the real reason.

On equipment that can be dangerous you use a momentary switch to energize the coil on a relay and the contacts on the relay to hold the circuit in (aptly called a holding circuit). The reason this is done is so that if there is a power interruption and the equipment stops, it will not come back on when power is restored to the equipment... thereby no one is injured or killed when this happens. With a maintained switch the equipment will come back on in operating state.

For example, I work in the food equipment industry and our big mixers or meat grinders operate in this fashion so that if the lid or bowl guard is opened the power to the relay coil cuts off and can not be started unless the momentary switch is again pressed. Otherwise when someone could be in a pretty precarious position if the power is restored to the unit. This would be even more important in large factories with even more dangerous equipment.

Not on topic but I hope it helps.

 

[fc36]

Momentary switches are used for horns, buzzers, jogging and like I said, with a relay, they can be used like a maintained switch.

Resurrect: Is there a special kind of relay that accepts a momentary signal and remains hot or does any correctly rated relay remain hot until it receives another momentary signal from the same pushbutton to shut off? I'm very good with process and wiring because I do it for my day job, but signals and instrumentation confuse me. The benefit and curse of being a chemical engineer.

 

[jpalarchio]

Your question was already answered but no one gave you the real reason why a momentary switch is used. Some gave you side uses but not the real reason. On equipment that can be dangerous you use a momentary switch to energize the coil on a relay and the contacts on the relay to hold the circuit in (aptly called a holding circuit). The reason this is done is so that if there is a power interruption and the equipment stops, it will not come back on when power is restored to the equipment... thereby no one is injured or killed when this happens. With a maintained switch the equipment will come back on in operating state. For example, I work in the food equipment industry and our big mixers or meat grinders operate in this fashion so that if the lid or bowl guard is opened the power to the relay coil cuts off and can not be started unless the momentary switch is again pressed. Otherwise when someone could be in a pretty precarious position if the power is restored to the unit. This would be even more important in large factories with even more dangerous equipment. Not on topic but I hope it helps.

Interesting concept and it makes complete sense from a safety aspect. I don't know that I've seen a circuit diagram that does this.

Wouldn't this be a good way to ensure your element isn't live when firing up your control panel?