E.stop wiring

Hello I'm looking for guidance on wiring e.stops in to a new electrical, circuit. I have a inkling but just wanted reassurance or putting right.

I've got a kjd17 5 pin with a link on one of the terminals to the 5th pin. Supply in and supply out I get but where the separate link goes from the negative to A1, is this where I run E.Stops from taking the link of and running through every E.Stop and back to the terminal.?

I'm wondering why it's the negative wire I would of thought it would be the live, but I suppose the negative is just the return of live

Hi Grant

Assuming you have fed live through the NC connections of an emergency stop switch (if fitted)

A1 is the "hold on" supply for the No Volt Release

Feed live to pin 23 - when Green button is pressed, without live to A1 the live supply will drop out as soon as the Green button is released

Link pin 24 to A1 taking live to your motor, if mains drops out, the "hold on" drops out rendering the circuit safe

*deleted"

Edited By Bikepete on 09/05/2019 10:46:50

So which terminals are live and neutral, this basic wiring is suggesting 13 and 24 are live, and 23 and 24 with a1 coming from the neutral out to the motor is this correct?

With relation to link wire is it this that runs from 24 through each stop button and back to A1 so if the circuit is pressed it cuts at any of the stops ?

KJD17 E-stop wiring diagram

So I think I got this now,

power IN neutral to 13

Power IN live to 1st E.stop through and onto next E.stop through and back to 23

Power to motor live 24

Power to motor neut 14

And leave the link in place from A1 to 24

Not quite.

This would run power through all the e-stops. A combination of your scheme and Johns is the best compromise. If you have a E-stop right next to the KDJ 17 wire it in series with the input as you describe. Then wire any additional E-stops between A1 and 24 as John's diagram shows. It's a debatable point but I would swap the live and neutral on Johns diagram so you don't have 240V live with a high current fuse running to all the e-stops.

The problem with Johns circuit is that it relies on the KDJ 17 working properly. If the closest E-stop is wired in series with the supply then if you press the normal stop and it doesn't work you will naturally hit the nearest E-stop which will. The remote E-stops still rely on the KDJ 17 but you generally won't be using them because the normal stop was broken.

Robert G8RPI.

Robert is right

You want to protect the KDJ17 switch by putting the E Stop Switch first, this is shown in the middle of the three pictures, live feed to the left, live output to KDJ17 in bottom picture

Hitting E Stop Switch must prevent all live feed to downstream circuitry

So...

Live in to e.stop next to kjd17 then to 13

Neut in to 23

Neut out 24

Live out 14

Extra stop 4ft away neut 24 link through e.stop back to A1 link.

Assumes terminal post numbers are correct from the above information

The "hold on" relay is internally wired to Neutral, just needs a Live supply to A1

Edited By Andy Carruthers on 09/05/2019 13:34:36

Edited By Andy Carruthers on 09/05/2019 13:40:46

Doesnt that diagram put the live on the wrong side ?

The diagram reflects the wiring in the photos and correctly represents how the Emergency Stop Switch protects the KJD 17 and Load

Please PM if you think there is an issue, always willing to be educated

Following diagram which has been drawn. Any additional stops replace the small ink wire from 24 to A1

I have read your latest comment several times and am struggling to grasp what you mean

If you wire your switches as per photos and wiring schematic your wiring will be functionally correct and provide the best protection

The estops should switch the coil of the NVR not the full load current of the motor.

Mike

I've wired it up to the diagram provided. The only thing I was trying to say was the extra e.stop that's 4ft away simply replaces the link wire then when pressed it would break the current, or have I got that wrong.

In relation to Mike's comment that's gone straight over my head. Please elaborate

In john swift 1s schematic diagram the coil of the NVR is controlled through the estops button and the motor load is switched by the contacts of the NVR. The NVR contacts will be designed to reliably make and break the load current. An estop button is designed to switch the current of a control circuit and is unlikely to break the full current of the motor without being damaged. The coil of the NVR is a very small load and will not damage the contacts of an estop type button. Andys suggestion will put the full load of the motor through the estop contacts which could damage the contacts when operated.

Mike

Mike - You are right - on reflection, the E Stop Switch current rating is 12A @250V so unlikely to be damaged with the loads I have

Wired up with the e.stop in same box, reading the latest I'm running a .37kw motor so di I need to be concerned ?

I now need to know how to wire up an additional e.stop, going of Robert's advice would I replace the link wire with an e.stp?