Cooling new installation

[suntravel]

I am using these ones, because I have them in stock:

https://www.automation24.biz/main-conta ... 2015-1bb41

Uwe

[vdiallonort]

Hi,
Thanks a lot for your time and input.
Sorry for the newbie question,I am trying to learn and understand better how to setup,Would you mind explaining your thought process ? What is the benefit of using an external contactor ?
I look at my acorn relay board :

My understanding is that this relay will hold 10A at 250V AC. Is this incorrect? Or is there another risk I don't understand?

[suntravel]

If one of Acorns relays quits working, it is difficult to replace, so I use them only for light DC currents.

Maybe it is also better to avoid noise problems, to keep high voltage AC as far away from the board as possible.

Uwe

[vdiallonort]

Thanks for the info and knowledge.

So, should I filter the noise from the high voltage using this: https://shopcentroidcnc.com/shop/cnc-ac ... -snubbers/? Also, the contactor you mentioned is for three phases, but I only use one. Is this okay?

Also how far do you need to separate high current an low one ? I bought an Optimill M4HS already retrofit, so the old cabinet takes a huge space in the back in the machine and the arcorn stuff is in a separate cabinet on the side of the machine. I was thinking of moving the servo controller into the acorn cabinet but from what I understand from you it would be a bad idea.

[suntravel]

Related reading:

https://www.centroidcnc.com/dealersuppo ... ds/206.pdf

For 24V DC coils a suppressor diode is required, but build in the Siemens contactor.

You can use a single cabinet, but try to have some space between AC and DC parts and wires.

Uwe