Synology DS918+ Power Supply

• 

  Bredo on 02/04/2023 - 02:21

  Sounds like you will be better playing it safe and just buy the original: https://www.pclan.com.au/synology-100w-power-supply-adapter-…

• 

  garetz on 02/04/2023 - 04:19

  Definitely get the original, an oem could take out your nas and the drives inside it, not worth the risk.

• 

  rumblytangara on 02/04/2023 - 09:46

  -3

  Sheesh. All this paranoia about a simple DC adaptor. These things are really not complicated. As long as the plug fits, voltages and max amps are good, then I would not worry about it.

  Pretty much all my networking electronics are running on third party adaptors, because they're from overseas. Some are Meanwells (widely accepted as good) and some are fairly random because I needed slightly unusual voltages. Really not something to obsess about.

  Can't help on the connector though… it looks like a small DIN but I don't have anything that uses them beyond my 1980s keyboards.

  Looks like the Synology maxes out around 40W. For a 12V power supply you're looking at ~3.5A which means you need a power brick and not a wall wart. If I was getting a generic, I'd add a buffer and look for 5A.

  https://www.techpowerup.com/review/synology-ds918plus/13.htm…

• 

  nicktork on 02/04/2023 - 12:22

  This one: https://www.amazon.com.au/KFD-Adapter-Charger-Synology-DiskS…

• 

  outlander on 02/04/2023 - 13:25

  This thread here says its a 12v 8a with a 4 pin din connector
  https://community.synology.com/enu/forum/1/post/148997

  If it was just a barrel jack I'd say go with generic, but din connectors are a little harder. You'd want to be 100% you got the polarity right

  To answer your Q's

  Why are there different pins?

  Many reasons. Might be to spread the load (8 amps is a lot), to prevent mixup, or for cost reasons. 80% of the time its the last one

  Why are there different wattages?

  Different models I'm guessing. The more hard drives or the faster the cpu, the more power it will draw. And again, cost. Lower wattage supplies are cheaper

  What happens if its not enough?

  The wattage rating is the maximum the power supply can safely deliver. Many times the device will run fine with a lower rated power supply because the device doesn't use that much power 24/7. But if there is a sudden spike in power draw, beyond what the power supply can safely deliver, voltage will drop. This will most commonly either trip the overload on the power supply (if it has one), break the power supply, or possibly break the device (although that's usually less likely).
  In general it's not recommend.

• 

  GordonD on 02/04/2023 - 13:59

  Why are there different pins?

  To force you to buy the "genuine" replacement part at an inflated price.

  Of course they would say it was to protect you from cheap poorer quality or wrong specification third party power supplies that might damage your device and the drives in it and the data on them.

• 

  ozbs25 on 02/04/2023 - 16:05

  The one you linked 100% works as I bought one to test on my DS918+. I wasn't sure what the problem was and didn't want to spend $100 on a genuine one just to find out something else had died. I'm with the others, I don't quite trust a cheaper non-genuine power supply (at least long term) so I went and ordered a genuine one straight after my DS918+ powered on. I used the KFD power supply for short periods while I waited for the other power supply to arrive.

  Edit: I guess there's no such thing as 100% but it worked for my DS918+

• 

  lint on 03/04/2023 - 10:43

  Mine died last month and the genuine part was out of stock for several weeks. Eventually got it delivered for $109 at JW Computers.

  I would advise against getting any 100W power supply because people have noted that Synology has a different pinout to the standard DIN connector. I also don't trust those third party parts available on Amazon and ebay enough to give them a go. Better to spend that extra $60 more for the genuine part, IMO.