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Apr 27, 2021, 10:39 AM
Registered User
I just made this for about $100...

2400w, 24v... Ultra quiet and does not overheat outside during summer in Southern Spain...


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Apr 27, 2021, 12:06 PM
Retired Electronics Specialist
vollrathd's Avatar

Don't disconnect fans!


Quote:
Originally Posted by mt_100
The PSU is designed with the proper fan speed by the manufacturer to facilitate adequate cooling to the unit. As more power is consumed from it the fan will run faster to keep it from overheating. Changing the fan speed will result in a very increased risk premature failure.
Some 10 years ago, the company I worked at had a 48 Volt 50 Amp power supply in one of our 38,000 volt circuit breakers.

The breaker was designed for out door use. The power supply fan pulled air through it. On humid days, we had PS failures.

So, one of our brilliant engineers decided that since there was no load on that power supply for 99.999% of the time, just disconnect the fan.

Yup, we had power supply failures with the fan disconnected. About 20% of them failed. We had to replace hundreds of them with a P.S. design with no fan. The replacement PS ran about $1200 each.

These PS units are installed in HV breakers, typically located 30 feet in the air. Repair required a boom bucket truck. That factory recall cost many $100K's.

I checked the temperature rise of an internal transformer in that PS. It hit 350 F after two days.
Last edited by vollrathd; Apr 27, 2021 at 12:15 PM.
May 06, 2021, 02:50 AM
Registered User

Delta/IBM DPS-120BB


Hello,

I hope to be in the right place...

I have just got a DPS-1200BB PSU which I would like to output 14+ V and I thought I had instructions on that, but I just can't find them anymore.
After searching, I have found information on DPS-2500BB, -2000BB and -1600BB and the question is: it is applicable to my model?

For instance:
- https://www.rcgroups.com/forums/show...1#post18117345

Thanks in advance!
Jun 18, 2021, 08:18 AM
Registered User
has anyone found out how to disable OVP on DPS-800GB-1A , it different from regular DPS-800GB A, same goes for 800GB-3A. I can max 13.2V, but want at east 13.6V
Jun 18, 2021, 11:24 AM
Registered User
I have a few A870P power supplies, thanks to this forum I have been able to make them work to give me 12 and 24(series setup)volts.
I have 2 questions on these please

#1 is there a way to force the fan to high speed (just to make sure they will run faster? Currently they run slow, I haven't yet been able to get them to run faster.

#2 is there a way to adjust the 12v to a higher voltage on these? I am not sure how to get this done (or of it's even possible)..

Thank you in advance for any assistance ��
Jun 18, 2021, 07:55 PM
Registered User
Hello! Please help to turn on Delta DPST-2530AB A 12.5V 12V 200A

I try to connect yellow pins to GND with 500 Ohm resistor, but no effect
Jun 19, 2021, 10:19 AM
Registered User

Milan


Hi, I am looking for any info or wiring of the SUN Sunfire, model TYCO A187 - 48V/30A power supply.
PinOut, or any info ? Thanks
Jun 25, 2021, 09:45 PM
Registered User
Well... It worked one time... 😒
I have a few A870p PSU's, had one setup and running my battery charger (hitec x4 plus). Charged 4 6 cell batteries at 5 amps each, the psu seemed to have no issues. Went back today to setup again and now when I connect the charger to the PSU, the green light on the back immediately goes yellow. I need to unplug the PSU to get it to come back on.
Not sure why this is happening and I could sure use a bit of direction please.
Why would it work yesterday, and now does not (nothing in the setup has changed).

Thank you for any advice..
Jun 27, 2021, 12:52 AM
Registered User
Quote:
Originally Posted by xandrios
No. Just good old fashioned 220v and a wrench to bolt the heavy 12v cables to it.
Astec DS2600-3-001 2600w 215A 12v
Same pinout as DELL M1000E 2360W PSU(12v 196A) or 2700w PSU(12v 225A) E2700P-00 or C2700A-SO.

A mean beast if someone can find the pinout for it.

My mouth is still watering!!


sr... good nite.. i know its been some time since u post this one.. but did u get the pinout for this power supply??? i got the C2700A-S0, but i havent found it.... will u give me some support on it???? want to turn it on but did got any luck.....
Jun 27, 2021, 01:29 AM
ancora imparo
jj604's Avatar
Thread OP
xandrios has not been on RCGroups for over 8 years unfortunately.

John
Quote:
Originally Posted by charlyiy
sr... good nite.. i know its been some time since u post this one.. but did u get the pinout for this power supply??? i got the C2700A-S0, but i havent found it.... will u give me some support on it???? want to turn it on but did got any luck.....
Jul 05, 2021, 03:05 AM
Registered User

power supply


Hi there JJ. ive seen your posts on how to convert a server power supply to use as a DC power supply. ive have purchased a IBM FRU 1300w power supply and was wondering if you could show me how to trick it into running the DC power 12v and which terminals to use.
Thanks in advanced , your help would be muchly appreciated
Jul 05, 2021, 03:19 AM
ancora imparo
jj604's Avatar
Thread OP
Sorry, I have no personal experience with that supply. Hopefully someone on here has.
Looks like powerful unit for a low price.
It would be good if someone figures out how to turn it on.

John
Jul 05, 2021, 04:50 AM
ancora imparo
jj604's Avatar
Thread OP
I found a reference to it on a Russian bit miner site.

May be of some help - may not.

You might want to have look at

https://miningclub.info/threads/psu-...57.5375/page-1


I don't understand Russian but my friend Mr Google had a go at one of the posts and came up with:

"I'm waiting for normal pins 6 + 2 and terminals, I will take another block like this, since the noise is not critical to me. The only thing it is not very convenient to unpack, as it turned out, so if there is a possibility, then it is better to buy a soldered one. This is probably with all the server power supplies so, well, or hands from the right place, and not like mine))"

My interpretation?
1) It might be worth shorting pins 6 and 2. If that doesn't work try grounding them using the usual 1k resistor for safety.
2) This supply is noisy (what a surprise - it's a 1300 Watt supply)
3) It is difficult to solder the power wires.

Good luck and let us know if you succeed.

John
Jul 06, 2021, 06:59 AM
Registered User

Cisco DPST-1200CB 1200W turn ON


113 / 5000
Wyniki tłumaczenia
I have a Cisco DPST-1200CB 1200W power supply. Unfortunately, I cannot find the pinout of this power supply. How to turn it on?
Jul 06, 2021, 03:34 PM
Bombs away! Err...landing
Ira NZ's Avatar
Quote:
Originally Posted by Holtek
113 / 5000
Wyniki tłumaczenia
I have a Cisco DPST-1200CB 1200W power supply. Unfortunately, I cannot find the pinout of this power supply. How to turn it on?
If you can't find a pinout you might have to just trial and error it.

Probably room for a lot of argument on the best way to do it, but I'd start by plugging it in and shorting each pin to the case(Should be grounded) one by one and see if one turns it on.

If that doesn't work, short the first pin to the second, first pin to the third, first pin to the fourth and work through all of them. Then second pin to the third, fourth, fifth and so on.

Hopefully at some point there you'll hit the right ones.

Or you'll fry something, but a dead power supply isn't much worse than what you've got now.


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