XPS 8940, PSU auto-switching from 110v to 240v ?

@Chino de Oro​

No, the power supply does not switch from one voltage to another.  The XPS 8940 power supply supports a wide range of input voltages 90 VAC - 264 VAC, therefore, it will support any voltage within the support input range.  It is safe to use with 240 VAC in Belgium.  You may need an appropriate power cable for the AC outlet.

The wide input range means it would work. I think you misunderstood 'auto-switching' here? The definition of an 'auto-switching PSU' is "An auto switching power supply can support multiple voltages without flipping a physical “switch.”

Small point, but can confuse the OP I'd think, but as @JamieLinux mentioned, to be sure what PSU one has and its capability, check the label on the unit.

@Chino de Oro​ The sheet in the Dell spec page is wrong, if you look at the PSU sticker itself it supports 90-240v not 264v. The AC input part of the sticker tells you the supported ranges. 

"By reading only one sentence, leaving the other half out, it would have a different meaning.  Didn't know how to say it clearly without jumping into more technical.  Therefore, only said a power supply is not switching from one voltage (110v) to another voltage (240v) because it's also capable of other voltages within the design input range. "

For the majority of PCs that is exactly what they call auto-switching. 

Power supplies can be auto-switched or have a fixed input. An auto-switching power supply monitors the incoming voltage from the wall outlet and automatically switches itself accordingly. Auto-switching power supplies accept voltages from 100 to 240VAC at 50 to 60Hz.

That PSU is NOT auto switching, Just showing as a reference.,

The XPS 8940 PSU is auto-switching with a rating of 90V-240V at 7jA
That is taken from the manufacturer sticker of the PSU, don't ever just take the DELL manual, always check the included sticker on the PSU. Because it 100% does not support 264V

@Chino de Oro​ 

First, I think and appear to have seen some errors carried over from model to model, a lot of that is cut and paste I assume, so errors replicate.

That said, it is possible different PSU's can have different spec's. These are the ones installed into 8940's for instance (from the FAQ which could contain errors as well):

PSU
2VD0G 360w Liteon
5K7J8 500w Delta
99TPH 500w Liteon
Y7R0X 500w Chicony

All though are Auto Ranging, adapts to the input voltage.

Some may NOT be in non-US sold PC's. Just like Dell has a motherboard for Brazil Only.

Motherboards =
KV3RP Foxconn 02012PQ00-600-G, Released July 9, 2020
2W4W1 Foxconn 02012TA00-600-G, Released December 1, 2020, Brazil only
F1H92 Foxconn 02012YJ00-600-G, Released March 15, 2021, Brazil only
427JK Foxconn 02012VY00-600-G, Released March 15, 2021
K3CM7 Foxconn ??, Released July 14, 2021

@Chino de Oro​ "Discussion is good, but it became a distraction when steering off topic by others.  I think you al going to confuse OP more than I do.  Although the voltage was mentioned, I think the main question was OP wanted to know if the XPS 8940 can be used with an electrical outlet in Belgium.  The meaning of my response to OP is still the same.  The XPS 8940 power supply can support a wide range of input voltage, not just from one specific voltage to another.  Therefore, it's safe to use when getting to Belgium.  Just remember to get a proper power cable."

Correct the power supply from the United States where the OP is coming from will work as the PSU is auto-switching and will swap from 110v 60hz  US to 240V 50 HZ EU.


From you "Yet, this thread topic somehow becoming how switching power supply works.  Maybe someone else will start commenting on linear power supply or output switching voltages with pulse width modulation." 

Your Original statement.

@ispalten​ 

from the FAQ which could contain errors as well
* The FAQ XPS 8940 was posted 4 years ago. I can correct any errors in it. I just need you to tell me the errors and how you would edit it.

@DELL-Chris M​ 

I didn't post that it was, I just commented it was not correct, and in the past I've discovered problems on websites and maybe he @Chino de Oro had discovered on in the timestamped reply above on May 19th, 2024 17:57 in the table.

His post has a max. Voltage of 264V which is clearly wrong.

No need to check with him, I found it on Dell page, https://www.dell.com/support/manuals/en-us/xps-8940-desktop/xps-8940-setup-and-specifications/power-ratings?guid=guid-62a71595-e1bb-408f-86e0-f3e450812e4b&lang=en-us, been there for a long time I bet 😊

@ispalten​ We cannot edit the online manuals. We can only edit the Post we make on our Forum. For a newer still selling model we could submit a trouble ticket for the online manuals.