Wiring Diagram check

[Clive S]

It seems to me like your diagram causes the BOB to take 12V in when you press the override switch. I'm not sure the BOB can take that much on the input pins

I don't think you are understanding the relay contacts the 12 Volts -ve is connected to ground and the +ve is to the buzzer then though to the relay contact. Now when the override button is pressed the relay changes state and then grounds the buzzer to make it buz. In no way is it connected to the input pin on the bob

[eurikain]

Oh wait I was confusing with the home switches ! I put the buzzer on the wrong circuit.. it should be on the limits circuit. So the CN1 is the relay right (in my case 24V) ? Let me update the diagram and post it again :)

[eurikain]

How about now ? I moved the buzzer to the limits circuit. When you press the override switch, it does have power, right ?

[Clive S]

How about now ? I moved the buzzer to the limits circuit. When you press the override switch, it does have power, right ?

Wrong first why don't you change the markings on the BOB so that they mean something correct ie you are showing that you are connecting the home switches to a Z limit etc.
You have now connected the buzzer in series with the relay coil!!

[eurikain]

Here is the updated BOB input names. Sorry for the confusion I just copied the part setup from the manual. But they were actually not relevant.

What's wrong with connecting the buzzer in series ? If you explain to me the role of the override switch and how it works then i'll probably be able to understand what is not right in my diagram :(
Here is the QElectrotech file, if that can be of any help :)
wiring-diagram.qet.zip

[cropwell]

What's wrong with connecting the buzzer in series ? If you explain to me the role of the override switch and how it works then i'll probably be able to understand what is not right in my diagram :(

wiring-diagram.qet.zip

1. It is not a good practice to derive power feed in this way.
2. The buzzer will not pass enough current to pull in the relay.

[Clive S]

Here is the updated BOB input names. Sorry for the confusion I just copied the part setup from the manual. But they were actually not relevant.

What's wrong with connecting the buzzer in series ? If you explain to me the role of the override switch and how it works then i'll probably be able to understand what is not right in my diagram :(
Here is the QElectrotech file, if that can be of any help :)
wiring-diagram.qet.zip

The BOB input names are relevant especially when you are asking basic questions.
.

I believe you are using two 12V fans in series so that you can power them from a 24V supply now have a look at the drawing re the buzzer and the relay coil and see if you can work that out. (I am not trying to be difficult but you have to fully understand the reason) clue is you are halving the voltage with the fans..
.
The purpose of the override switch is simply to provide a path to ground to energise the relay in the absence of a limit being tripped ie opened.

[eurikain]

Alright, I get it now :) Wiring the buzzer in series drops the voltage in half, therefore both the relay and buzzer get 12V, which obviously isn't enough for the relay. So, I need to wire relay and buzzer in parallel and the SPDT switch allows opening the override line that bypasses all switches PLUS a parallel line where the buzzer is. Back to physics 101... ! :D Is this correct ?


EDIT:
I still have to make the changes for the contractor and for the VFD stop.