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Help with a component in my CNC enclosure

DavidR8

DavidR8

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I have a Schaffner FN2030-10-06 EMI filter. I can see where it goes in the attached PDF. Note that it is the exact part number as in the diagram.
Tech specs are here:
www.schaffner.com

FN2030-10-06 | Schaffner Holding AG

10 A EMC filter with fast-ons
www.schaffner.com www.schaffner.com
IMG_2030.jpeg
The wiring diagram shows the EMI filter in line before the DC power supply. But the label on the filter clearly says N (DC-) and P (DC+) Load side and the same for the Line side.
Before I install this thing I want to make sure that I'm not going to let the magic smoke out by connecting it the the 240V AC line and load.
 

Attachments

If you have a VOM I would test dc continuity between the input and output terminals of the same polarity. I'm guessing that it contains (at least in part) two series inductors. Kinda like the choke filters back in the vacuum tube era.
 
Don Sipes said:
If you have a VOM I would test dc continuity between the input and output terminals of the same polarity. I'm guessing that it contains (at least in part) two series inductors. Kinda like the choke filters back in the vacuum tube era.
Click to expand...
There's continuity between the line and load on each side.
 
I wrote to Schaffner support before I asked here and they wrote back to me:

Hi David,

These filters are rated for both AC and DC.

The label gets kind of crowded with all the details but I have circled the terminal markings that refer to AC:

P and N (Phase and Neutral) on the left are the inputs. P’ and N’ on the right are the outputs.

Below is the schematic and you can see how the P(DC+) etc. correspond to the schematic.

Please feel free to reach out to me directly with any further questions.

Thanks,

Mike

image007.png
 
DavidR8 said:
I wrote to Schaffner support before I asked here and they wrote back to me:

Hi David,

These filters are rated for both AC and DC.

The label gets kind of crowded with all the details but I have circled the terminal markings that refer to AC:

P and N (Phase and Neutral) on the left are the inputs. P’ and N’ on the right are the outputs.

Below is the schematic and you can see how the P(DC+) etc. correspond to the schematic.

Please feel free to reach out to me directly with any further questions.

Thanks,

Mike

View attachment 57400
Click to expand...
That's what I was going to say but they beat me to it. I use these types of filters all the time. Notice the DC+ is in brackets as optional. Not required.
 
jcdammeyer said:
That's what I was going to say but they beat me to it. I use these types of filters all the time. Notice the DC+ is in brackets as optional. Not required.
Click to expand...
Thanks John. I also have a question about the capacitors between the DC positive and negative legs in the diagram.
What’s your thinking on their need?
1736274794995.png

I don’t have any so I would need to source them.
 
Last edited:
DavidR8 said:
Thanks John. I also have a question about the capacitors between the DC positive and negative legs in the diagram.
What’s your thinking on their need?
View attachment 57406
I don’t have any so I would need to source them.
Click to expand...
It depends a lot on what type of power supply you have. These are, 1000uF 100V electrolytic capacitors. I doubt you need them but it wouldn't hurt.

If you do want them I'll likely be doing another Mouser order Thursday or Friday.

 
jcdammeyer said:
It depends a lot on what type of power supply you have. These are, 1000uF 100V electrolytic capacitors. I doubt you need them but it wouldn't hurt.

If you do want them I'll likely be doing another Mouser order Thursday or Friday.

Click to expand...
I have a 48V, 20A power supply.
If you could add them to your order I'd be mighty grateful.
 
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