Hello,

Do you know if a CSS610-8P-2S+IN can power 24V passive PoE devices ?
Datasheet does not specify this.

Best regards

Product page specifies power input as AC or 48-57 V DC. So where is the 24V for PoE out supposed to come in?

Product page specifies power input as AC or 48-57 V DC. So where is the 24V for PoE out supposed to come in?

CRS328-24P also has an integrated power supply. With it, you can select 24V or 48V PoE out on each interface.
CRS328-24P datasheet is not explicit about this specific capability.

If Mikrotik datasheet did include a line like "PoE out voltage: 24V, 48V" or "PoE out voltage: same as DC power supply" or any neutral wording bringing the same information, that would certainly help.

May I also add, that with current electronic shortage, there are not many available devices able to power 24V passive devices.

What is a bit confusing with CSS610-8P-2S+IN is its dual AC and DC power sources.

If a CSS610-8P-2S+IN owner could just look if PoE voltage is selectable ...

The only options available are on, auto, off. Whenever I see the ability to turn PoE “on” I think passive but haven’t tested that theory with this device. Might be able to find time to test with a spare rb5011 later.

Have the very same PoE options with my CRS328-24P which I know for sure does passive. Very inclined to believe the CSS610-8P does as well.

Have the very same PoE options with my CRS328-24P which I know for sure does passive. Very inclined to believe the CSS610-8P does as well.

Thank you all for you valuable inputs.
I hope I'll test a CSS610-8P soon.

I hope I'll test a CSS610-8P soon.

I hope things turn out fine. However, reading [url=https://help.mikrotik.com/docs/pages/vi ... =141197377]user manual[/qurl] doesn't make me optimistic. It says:

Powering

The device accepts power from the power jack or from the AC source.

Direct-input power jack (5.5mm outside and 2mm inside, female, pin positive plug) accepts 48-57V DC.
AC input:
Nominal voltage 54 V.
Nominal current 2.8 A.
AC input range 100-240 V.
Max power consumption (without attachments) 12 W.
Max power consumption 162 W.
PoE-out 802.3af/at and passive PoE-out.
Smart PoE Controller.
PoE-out ports Ether1-Ether8, max out per port output (input < 30 V): 1000 mA.
max out per port output (input > 30 V): 625 mA.
Total output power 140 W.

The last highlited item does add some optimism though.

Passive Poe works fine for both 48 and 24V

AC will supply 54V to the board which converts to 24V as needed, or whatever 48V DC you can supply

PS. Wish it up converted from 24V to 48V would make it much more useful for our use case

AC will supply 54V to the board which converts to 24V as needed, or whatever 48V DC you can supply

Nice. This makes CSS610-8P one of rare MT devices (if not the only one) that actually do perform voltage (down)conversion internally. Which makes mentioning it in product page and user manuals even more important.

Nice. This makes CSS610-8P one of rare MT devices (if not the only one) that actually do perform voltage (down)conversion internally. Which makes mentioning it in product page and user manuals even more important.

CRS328-24P also provide "on demand 24 or 48V".
I second datasheet could be improved to inform on this specific feature.

Nice. This makes CSS610-8P one of rare MT devices (if not the only one) that actually do perform voltage (down)conversion internally. Which makes mentioning it in product page and user manuals even more important.

CRS328-24P also provide "on demand 24 or 48V".
I second datasheet could be improved to inform on this specific feature.

CRS328-24P is different as it only features internal power supply, no possibility to use DC power input. With internal AC supplies it is possible that PS actually provides both 24V and 48V and then PoE-out module simply selects one of input voltages. The same way as it's done by CRS112-8P which actually has two DC power inputs, low- and high-voltage and both have to be connected for PoE-out voltage selection to work.
CSS610 is different as it also has a 48V DC input and documentation implies that even with only 48V DC power supply device still provides either 24V or 48V PoE-out ... which clearly requires internal voltage down-conversion.

This discussion has now turned into the "bitching about" corner, not contributing in any usable way. So I'll stop posting now

i was shocked to find that my CSS610-8P powered up a old RB433! very cool. swOS web gui shows 27.5v while my other poe ports show 53.3v (are af/at devices on those).

in the sw os web gui you can select voltage level: auto / low / high (rb433 was set to auto and worked)

im only using the internal AC 120v power supply of the css610.

(i very much like this switch due to low noise, although it does have a fan, plus the 2x sfp+ 10g ports!). only downside in my use case:
1- no mstp support , rstp only (not a big deal on a 8port sw though)
2- no remote syslog support (quite disappointed in this one).

great switch, at a great price.