8 PoE+ Port SD-Switch: No Fans, Always Reliable!

Peplink’s new 8-Port SD Switch is available now! With its fanless design and industrial temperature range, the 8-port switch is ideal for the toughest environments. It can also accept AC and DC power and has multiple power inputs for ultimate reliability!

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What PoE+ output [W] can be reached if I only use the terminal block to power the device with 12V ?

Hello @Alan,
We have already deployed some of these to customers and they are a great product. I’m sharing here a few photos taken during July of these being used.

Here is the new Switch on operational display at the 2018 Comms Connect Conference in Sydney

Here is the new Switch in operation at a customers site installed with customised rack mountings

Here is the new Switch operating in the back of a motor vehicle to power our latest developments

We are looking forward to doing a lot more with these amazing switches.
Happy to Help,
Marcus :slight_smile:


Hello @ue-it,
The PoE+ output will be dependant on your supply source if you use the terminal block, if you only supply 12VDC then the PoE will not work, if you supply 48VDC or 56VDC with sufficient power available (amps), then you can expect to be able to operate any standard PoE+ device.

You can see in our photos shared the Pepxim SD-PMU, this works brilliantly for powering the Peplink PSW-8-240W-RUG units. In both of these installations, the Pepxim SD-PMU shown is running from a 12VDC source.

Happy to Help,
Marcus :slight_smile:

Hi Marcus,
i am an early adopter as well.

No admin’s desk without a PSW-8-240.

10" Rack. (Peplink, please add brackets for 10")
So if i just connect the switch to a 12V car battery PoE will not work ? The voltage will be not transformed ?



Curious if anybody has mounted this unit using the optional DIN rail mount, I’m just wondering if it mounts with the Ethernet port facing up.

If anyone from PepLink is reading this - the fact that POE doesn’t work when powered with < 48VDC really needs to be made more explicit in the spec sheets.


I am attempting to deploy multiple Peplink 16-port switches and sourcing a router (considering Peplink options vs Cisco) and we are now at a hard stop.

Peplink staff: Why is the PoE limitation NEVER mentioned in any documentation for the product?

If you feed 12-15 VDC, the switch operates as expected BUT no PoE. You MUST power with 48-54 VDC to get any form of usable PoE. We went with Peplink specifically due to the way the products were marketed and described in documentation. This is not a proper solution over Cisco or other offerings when supplying < 48-54 VDC ie from vehicle power systems. It appears you must use an additional Peplink product, PMU PDU DC-to-DC converter to convert 12-15 VDC to a usable level for PoE functionality. But that is never mentioned in any documentation without trial and error or this lone series of posts.

This put us in a very costly and challenging situation due to time constraints and the current lengthy delivery time for the Peplink products. This project may now be scrapped due to poor documentation and not just sticking with known products ie Cisco SG350 series, regardless of their shortcomings in this space.

Hello @Sound_Speed,
What country are you in? Did you ask your Local Peplink Partner (who you are buying the solution from) to help you with this? Our team is based in Australia, and we always do our best to inform our clients on matters like this as we take considerable the to understand about their planned deployments. Although the SD-PMU is recommended, you can use other stable 48VDC sources. For example, we have some solar-powered installs where the existing solar MPV solutions deliveries a stable & clean 12/24VDC, so we use a professional DC to DC up-converter instead to get the required 48/56VDC. Spending the extra on premium industrial DC-DC upconverters and using the higher grade quality models is well worth the extra expense when you value your time.

In defence of Peplink (& I’m not an employee), we do not know of any proven claims (and that includes from many other manufactures of SD-Switches we also work with), that will give you PoE at the standard compatible with 802.3AT/AF if the switch only receives 12/24VDC, they all need at a minimum 48/56VDC. We’ve been supplying PoE switches for longer than Peplink have been making them and even the other brands we have supplied all stated the same as Pepink, and when using a 12/24VDC source, we always need to use a separate DC to DC upconverter. There are a tiny number of switches out there that will do a non-compatible PoE at the lower voltages; vendors build these for powering their own same branded equipment.

Happy to Help,
Marcus :slight_smile:

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Thank you for taking the time to reply.

There is nothing in the marketing material or manual to suggest that the SD-PMU or other source is required for full PoE support. In fact, when a system is advertised to work in virtually any environment and is a “go-to” for 12VDC operation (ie in vehicles), it would be less misleading if that was mentioned in plain language or better yet, mentioning it at all would be more genuine by Partner or Manufacturer.

We are in the USA and this was discussed with the Partner at length and the DC system in play (12-15VDC) was sourced through them. They were also unaware that Peplink had this issue based on how it was pitched to them (ie built to run on busses, cars, boats, trains, etc. where many systems only provide 12 or 24 VDC).

There are a few commercial and industrial products, admittedly with less network capability, that do provide PoE when 12-15VDC sources are in play. Yes the power budget is lower, but it is stated IN THE MANUAL. That is the missing piece here plus the idea that no PoE budget is available under 48-56VDC, that seems to be unique here.

Live and learn, but unless truly extreme conditions are a major consideration, I cannot see the value of this vs other offerings at a better or comparable price, especially when you have to come up with a custom DC-to-DC converter or buy additional hardware from Peplink.

Here is the only hint of anything in their materials “The bundled PSU provides 90W of PoE power budget. If you require 240W of power budget, please add 180W PSU (ACW-623) to your device”

Soooo how much is supplied when not using the supplied PSU? The unit says it takes 12-56VDC, so what is a customer to assume? That if you need 90W, you might need their AC adapter, but is that the PoE cutoff? That if it does not receive 54VDC and 2.22A that it does or does not supply PoE? If so how much does it supply? Since it takes as low as 12VDC it supplies something right? Would it not have a DC-to-DC converter built in to supply something? ie take 12VDC and brings it to 24, or 48VDC? There are too many assumptions required here based on missing data, either intentional or accidental.

Apart from that, seems like a solid device, GUI is simple and easy, but at the price it could be a hard sell for some customers. Device + Custom Power or Manufacturer solution = Just under doubling the price as advertised. It is not unreasonable to ask for things like this to be noted in manuals or marketing materials.

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Sorry you have been caught out on this. Peplink documentation can be frustrating at times.

Just wanted to say that I have used 48V step up transformers from amazon for in vehicle deployments of Peplink POE devices very effectively and they are only $25. Something to consider to get you out of this situation quickly and cost effectively.

Like this one:


Thank you Martin! Looking to see if we can get one of the industrial type converters in time. This looks like a good thing to have on hand in a pinch. Much appreciated!


We ended up ordering these: https://www.powerstream.com/dc12-48.htm and I picked up one of those Amazon units as an emergency spare.

Certainly the Peplink unit is a cleaner setup and with more space/time to plan we would likely go with that. But it looks like the Powerstream converter will work for this specific setup.


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