Think of their outputs EXACTLY like a series stack of dry cells in your
flashlight.
+++[Positive Negative] ----[Positive Negative] ---
wall wart #1 wall wart #2
String up as many as you want, connecting positive to negative in between.
At the ends you will have a free positive and at the other end of the string
you will have a free negative.
-----Original Message-----
From: Robert Andrews
Sent: Tuesday, July 11, 2017 4:29 PM
To: [email protected]
Subject: Re: [AFMUG] Off sources for 48v 2.5 a power supplies
With wall warts, I having trouble wiring this in my brain, could someone
diagram the 48v out of 2x 24v for me? I get parallel but series seems
wrong... one neg as the neg term, connect that hot to the other neg?
and the other hot is 48V? I guess I should breadboard it, but I swamped...
On 07/11/2017 03:21 PM, Mathew Howard wrote:
Yeah, I've done that when I added some 48v gear to a tower and forgot to
bring the right power supply... all I had in the truck was 24v stuff, so
I hooked them up in series temporarily... it worked fine. And temporary
turned into like a year...
I've done them in parallel too... yeah, if they aren't both the same it
can be ungood. And certain power supplies don't like it at all even if
they are both exactly the same.
On Tue, Jul 11, 2017 at 11:11 AM, Chuck McCown <[email protected]
<mailto:[email protected]>> wrote:
Yes, you can combine in parallel too. Unless they are essentially
the same unit, you can have them not sharing the load equally in
parallel. Sometimes that can be ungood.
*From:* Steve Jones
*Sent:* Tuesday, July 11, 2017 9:57 AM
*To:* [email protected]
*Subject:* Re: [AFMUG] Off sources for 48v 2.5 a power supplies
That actually works? Does that apply in parallel as well if I have
the voltage I need but not the amperage? I just assumed multiple
power supplies connected together would be like crossing streams and
call up some demonic stay puff marsh mellow crickets or something
On Tue, Jul 11, 2017 at 10:02 AM, Chuck McCown <[email protected]>
wrote:
Two 24 volt wall warts in series. 4 - 12 volt wall warts in
series.
*From:* Colin Stanners
*Sent:* Monday, July 10, 2017 8:58 PM
*To:* [email protected]
*Subject:* Re: [AFMUG] Off sources for 48v 2.5 a power supplies
Most professional security cameras are either 24v AC or powered
off a .AF PoE switch with a built-in PSU so no external 48v.
Your local electronics supply would be the best chance.
On Jul 10, 2017 7:18 PM, "Steve Jones"
<[email protected]> wrote:
I meant off sources, local type joints that would have it in
a pinch, like plumbing shops carry our masts in stock, but
theyre called water pipe and come in 21 foot lengths. You
have to get them cut, and the cuts not galvanized,, but its
literally the same pipe (thanks sitepro for forgetting your
nail polish wipe)
I really figured the security joint would have it, with
multicam ip cams and all.
On Jul 10, 2017 7:07 PM, "Rory Conaway"
<[email protected]> wrote:
Amazon. Look for 48v 144w.____
____
Rory____
____
*From:*Af [mailto:[email protected]] *On Behalf Of
*Steve Jones
*Sent:* Monday, July 10, 2017 4:59 PM
*To:* [email protected]
*Subject:* [AFMUG] Off sources for 48v 2.5 a power
supplies____
____
I needed one of these in a pinch today called local
electricians and a security outfit, im betting the
security joint has them and doesnt realize it. ____
Any other ideas on where to look in a pinch?____
