Espritmodel.com Telemetry Radio
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Old Sep 26, 2011, 08:39 AM
Steven
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United States, CT, East Hartford
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Henry Ford Junior!!
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Old Sep 26, 2011, 01:29 PM
Unshaven yokel
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Portland, Oregon
Joined Oct 2007
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Lol. I only do medium duty on the supplies. Less than 0.5% loss from wire is calculated at full load. Sustained i have not tested beyond a few minutes. With the fans blowing on them i dont think it should be an issue, but there should be .8 watt dissipated per wire. Wire heat calculations are tough.

The binding post amp ratings come from the rating of the wire that cam fit through the hole drilled in them (10 gauge). With fork terminals, i dont think that rating applies since you can use thicker wire. The average resistance in a binding post from online studies was quite low 0.002 ohms or so. I calculated it to less than a few watts (and id assume the heavy gauge wire can transfer that efficiently)
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Old Oct 01, 2011, 01:00 PM
Born again newbie
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Calgary, Canada
Joined Jul 2007
994 Posts
Common instructions show that we should connect pins 6, 9 and 10 on the outside back. We now know that 6 is pskill, 9 is voltage adjust and 10 is pson. Pin 9 should be connected to ground via a resistor.

What should we be connecting to turn the PS on? Do we need to connect both pskill and pson to +5 or gnd? Does it have to be both?

Is there a way, other than disconnecting AC, that we can turn the PS right off?

Thank you,
David

Quote:
Originally Posted by whitedg View Post
Yes, 12K-15K to Ground to slow down the fan speed.

Here is the rest of the pin mappings (Using Xandrios's image from post 586):
Outside Back Pin-- Wire Number
1----------------- +5VSB, not on ribbon wire
2----------------- +5VSB, not on ribbon wire
3----------------- +5VSB, not on ribbon wire
4----------------- 3 (Controls fan speed)
5----------------- -12V, not on ribbon wire
6----------------- 5 (PsKill)
7----------------- 6 (not sure what this one does)
8----------------- Ground, not on ribbon wire
9----------------- 8 (Voltage Adjust)
10---------------- 4 (PsOn)
11---------------- 9 (Current Share)
12---------------- 7 (not sure what this one does)

Mapping it for the ribbon wire:
1---------------- Gnd
2---------------- Gnd
3---------------- Pin 4 (Fan speed)
4---------------- Pin 10 (PsOn)
5---------------- Pin 6 (Ps Kill)
6---------------- Pin 7 (???)
7---------------- Pin 12 (???)
8---------------- Pin 9 (Voltage adjust)
9---------------- Pin 11 (Current share)
10--------------- Gnd (but so far I have not connected this and all seems to be OK).

Hope this helps
whitedg
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Old Oct 01, 2011, 03:30 PM
Steven
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United States, CT, East Hartford
Joined May 2010
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Pins 6, 8 and 10 should be the correct way to turn on this power supply.
Pin 9 should be used independently to control voltage.
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Old Oct 01, 2011, 05:18 PM
Registered User
Australia, NSW, Rydalmere
Joined Feb 2010
31 Posts
To turn the supply off, I connect a double pole switch with the Gnd to the commons on the switch and the other poles to 6 and 10. This allows me to shut the supply off, but keeps the AC power running. This also allows the fan to run in standby mode so you don't heat soak the supply.

These supplies had a bad reputation for dying if you racked and cabled a server but did not power it on as the power supplies would produce heat with no airflow. So they were modified them to allow some airflow at standby power.

Cheers
whitedg
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Old Oct 08, 2011, 09:30 PM
Unshaven yokel
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Portland, Oregon
Joined Oct 2007
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Discovered I can do 130A continuous on 120VAC on my JD200 @ 15V w/o it tripping overcurrent.

I bought a board on fleabay for $15 which is meant to plug into two of them. It's doublesided, one side for positive, the other for negative, with two big flat insulated copper 'cables' for positive and negative.

I know with other supplies I didn't have luck adjusting the voltage while doing current share. I'm hoping I can tie two together with current share and adjust the voltage and fan speeds for both with the board.
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Old Oct 09, 2011, 08:00 AM
Steven
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United States, CT, East Hartford
Joined May 2010
504 Posts
Hey sparkysko,

did you try the fan mod for the JD200 also.

Also, did you try a dual gang pot when adjusting voltage for both power supplies while in current share mode?
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Old Oct 12, 2011, 01:18 AM
Unshaven yokel
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Portland, Oregon
Joined Oct 2007
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Oh yeah. Did fan mod on 3.. 1 didn't turn out well, although my friend did the soldering on that :| , he's going to double check everything.

Fan mod completely eliminated RFI on my 2 I bought.

Never tried dual gang pot.

I might wait to buy another JD200 before I mess w/ the plug in board, or until I'm peer pressured.
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Old Oct 12, 2011, 07:51 AM
Steven
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United States, CT, East Hartford
Joined May 2010
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Cool. It's good to know that the mod works for different JD200 revisions.

Also, "Discovered I can do 130A continuous on 120VAC on my JD200 @ 15V w/o it tripping overcurrent."

Wish we had this back in the day.
Could of used it to power a Sweet Sixteen for home use..
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Last edited by xandrios; Oct 12, 2011 at 10:08 AM.
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Old Oct 19, 2011, 01:43 AM
Unshaven yokel
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Portland, Oregon
Joined Oct 2007
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Finally stopped being lazy and tried out the backplane board on my JD200's. I did the volt and fan mods. I put the two pots on the backplane board, and it controls both at the same time when a pot is turned.

Verified I can volt and do current share.

Wow, that was easy, lol.

Going to make a simple wood or plastic cutting board rack for the supplies to slide into and then tap power from the two huge copper straps for the + and -

For testing I'm using the binding posts on just one, hence the drop. 4,000 watts on 120VAC
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Old Oct 19, 2011, 05:48 AM
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Australia
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Quote:
Originally Posted by ciesin View Post
Hi all DPS800GB users. I have tried shortening pins 30, 31 and 34. +12V started but not at full capacity. The output voltage is quite stable up untill 16amps. When 16 amps is exceeded the voltage drops to 6V. Other outputs (+3.3V, +5V work at full capacity). I have two PSUes and they both work the same. They are not brand new so am not sure if they are 100% OK. Has anyone succeded to draw 80A using Borlax method?
I have the same issue. Is there a fix for this.
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Old Oct 19, 2011, 07:02 PM
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Near Kingston, Ontario, Canada
Joined Dec 2004
378 Posts
HP DPS-800GB Power Up Solution

Quote:
Originally Posted by lipoflyer View Post
I have the same issue. Is there a fix for this.
Finally after several attempts to get the supply to hold voltage with load I believe I have the answer. Instead of jumpering pins 30, 31 and 34 together just jumper 34 to 31 and tie pin 30 to +12V. So far I can now load up to 45 amps and the output drops just 100mv (12.9V to 12.8V). I do believe I will have a double gin and tonic to celebrate. I had almost given up and tossed the supply. Now I hope I can get more as I believe this is one nice compact supply capable of delivering 65 amps. I plan to series up a couple for 24V which be a piece of cake seeing as the negative is not tied to chassis ground.

Dave
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Old Oct 20, 2011, 06:55 AM
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Australia, NSW, Rydalmere
Joined Feb 2010
31 Posts
HP DPS-800GB Power Up Solution

Just checking, we connect as per the attached picture?

Thanks
whitedg
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Old Oct 20, 2011, 07:31 AM
Registered User
Near Kingston, Ontario, Canada
Joined Dec 2004
378 Posts
Quote:
Originally Posted by whitedg View Post
Just checking, we connect as per the attached picture?

Thanks
whitedg
Yes that is correct.

Good Luck. Let me know how you make out.

Dave

PS. If you plan on drilling through the positive and negative pins to solder on both sides be aware that on the positive pin there is a ground plane layer in the multilayer PCB that will short out the positive pin. Don't ask how long it took to find this out. I drilled a slightly larger hole and used a small piece on insulation on the wire to solve the problem. You really should go through with some solid #12 wire to be sure the foil won't lift off the pcb after continuous flexing over time.

Dave

Does anyone have some they want to sell?
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Last edited by 376782; Oct 20, 2011 at 11:44 AM. Reason: Adding info
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Old Oct 20, 2011, 12:37 PM
Registered User
Joined Oct 2011
2 Posts
Hi xandrios ,
How to disable the DPS-600PB OVP??


Best regards
vorshi
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