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FS108 DC Power Supply

jkonz
Aspirant

FS108 DC Power Supply

Hello,

 

I am looking for more information about what is the acceptable DC input power range for the FS108. The datasheet only says 7.5V at 1amp. But there must be an allowable range, can someone please specify?

 

Thanks!

 

Model: FS108v3|ProSAFE 8 Port 10/100 Switch
Message 1 of 6

Accepted Solutions
antinode
Guru

Re: FS108 DC Power Supply

> Would like to know if either 5V or 9V would work instead of 7.5V.

 

   I'd need to look at the design of the regulator of the FS108 to
decide that question.  My guess would be that higher would be more
likely to work than lower, but whether the design would tolerate that in
the long term is another question (to which I lack the answer).

 

   A quick+dirty(+cheap) scheme might be to put a couple of Si diodes in
series with the 9V supply to drop/waste about 1.4V.  Not classy, but
probably good enough.  And a little better than a direct connection to
9V.

View solution in original post

Message 4 of 6

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antinode
Guru

Re: FS108 DC Power Supply

> I am looking for more information about what is the acceptable DC
> input power range for the FS108. [...]

 

   Why?

 

> [...] there must be an allowable range, [...]

 

   No doubt, but there'd be no reason for Netgear to publish it.  I'd
guess that +/-10% (on the voltage) would be fine.

Message 2 of 6
jkonz
Aspirant

Re: FS108 DC Power Supply

I need to install this unit as part of a larger assembly and will not be using the standard AC to DC wall adapter. Would like to know if either 5V or 9V would work instead of 7.5V. 

 

Thanks

Model: FS108v3|ProSAFE 8 Port 10/100 Switch
Message 3 of 6
antinode
Guru

Re: FS108 DC Power Supply

> Would like to know if either 5V or 9V would work instead of 7.5V.

 

   I'd need to look at the design of the regulator of the FS108 to
decide that question.  My guess would be that higher would be more
likely to work than lower, but whether the design would tolerate that in
the long term is another question (to which I lack the answer).

 

   A quick+dirty(+cheap) scheme might be to put a couple of Si diodes in
series with the 9V supply to drop/waste about 1.4V.  Not classy, but
probably good enough.  And a little better than a direct connection to
9V.

Message 4 of 6
jkonz
Aspirant

Re: FS108 DC Power Supply

That is a good suggestion, thank you!

Message 5 of 6

Re: FS108 DC Power Supply

The ProSAFE range is pretty esoteric kit compared with the General WiFi Routers (Non-Nighthawk) devices covered in this bit of the forum. I doubt if ProSAFE experts hang out here.

 

You might get better and quicker replies, and find other answers, over in the appropriate section. That's probably here:

Switches - NETGEAR Communities

 

or here

Smart / Plus / Click Switches - NETGEAR Communities

There might even be a Netgear specialist following that area.

Message 6 of 6
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