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Author Topic: DPS2000BB Breakouts. New updates!  (Read 6708 times)
Optimizer
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July 21, 2017, 01:03:49 AM
 #61

I'm trying not to throw KNC under the bus. ;-)

Ummm.  That's probably correct, though it would be interesting to see those transients on a scope plot.  I am guessing your output voltage at the 12V stage sags and causes a runaway effect as I increases a few fold.  Possibly the extra resistance in those boards is causing a high voltage drop.

-Optim

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sidehack
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July 21, 2017, 01:56:47 AM
 #62

I can send you one to play with if you like. But as mentioned, even miners pulling 1300W off a 1500W PSU have no trouble, no real temperature elevation even at the contact points. S7, S9 and T9 miners pulling enough power to trip current on the DPS1200 (which is why I shifted them up to 1500W), same. The L3+ could have been trying to pull an extra 500 watts through a single cable pair without killing the PSU and 700 watts through a single cable pair could definitely cause a fire even on a good board. The PSU would have been outputting at least 12.5 volts.

Say whatever you want about KNC. Those guys knew how to get away with selling overpriced fire hazards a year behind schedule.

In general I'd recommend, like Optimizer, to use an over-spec PSU for improved efficiency. But occasionally that over-spec can cause a fire hazard if something else goes wrong and the PSU's overhead keeps it from tripping out before catastrophe occurs.

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Optimizer
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July 21, 2017, 05:10:56 PM
 #63

I can send you one to play with if you like. But as mentioned, even miners pulling 1300W off a 1500W PSU have no trouble, no real temperature elevation even at the contact points. S7, S9 and T9 miners pulling enough power to trip current on the DPS1200 (which is why I shifted them up to 1500W), same. The L3+ could have been trying to pull an extra 500 watts through a single cable pair without killing the PSU and 700 watts through a single cable pair could definitely cause a fire even on a good board. The PSU would have been outputting at least 12.5 volts.

Say whatever you want about KNC. Those guys knew how to get away with selling overpriced fire hazards a year behind schedule.

In general I'd recommend, like Optimizer, to use an over-spec PSU for improved efficiency. But occasionally that over-spec can cause a fire hazard if something else goes wrong and the PSU's overhead keeps it from tripping out before catastrophe occurs.

If you want to send me one, I can run a power test to see what's going on.  Though I am short on time for probably a month!

If the miner is defective, I would avoid any use.

-Optim

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August 03, 2017, 07:53:27 PM
 #64

hi, ive bought at almost 2 years 1 dps2000bb from jabberwock from france...
now after all this time and a crappy technobit hex4m miner the breackout board almost burned all the connectors...now im using it to my gpu rig but cant connect all plugs 4 are burned...ive read you sold them for 50usd but got to ask were do you ship from!!??
if from europe im interest on buy 1 brea\ckout board with cables soon to replace mine.
best regards
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August 03, 2017, 08:09:44 PM
 #65

BTW, still looking for a breakout board for the HP DPS-1200FB
Optimizer
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August 03, 2017, 08:25:58 PM
 #66

hi, ive bought at almost 2 years 1 dps2000bb from jabberwock from france...
now after all this time and a crappy technobit hex4m miner the breackout board almost burned all the connectors...now im using it to my gpu rig but cant connect all plugs 4 are burned...ive read you sold them for 50usd but got to ask were do you ship from!!??
if from europe im interest on buy 1 brea\ckout board with cables soon to replace mine.
best regards

We are US based (California)!

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Optimizer
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August 03, 2017, 08:26:35 PM
 #67

BTW, still looking for a breakout board for the HP DPS-1200FB


There is a proto for this in manufacturing.  Would you like to be a tester of sorts??  It is still about a month out in testing though!

If you would like to E-mail me off forums, go to the Contact Us section of my website. 

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usao
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August 03, 2017, 08:32:40 PM
 #68

BTW, still looking for a breakout board for the HP DPS-1200FB


There is a proto for this in manufacturing.  Would you like to be a tester of sorts??  It is still about a month out in testing though!
Sure that would be great.
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August 04, 2017, 04:31:42 PM
 #69

hi, ive bought at almost 2 years 1 dps2000bb from jabberwock from france...
now after all this time and a crappy technobit hex4m miner the breackout board almost burned all the connectors...now im using it to my gpu rig but cant connect all plugs 4 are burned...ive read you sold them for 50usd but got to ask were do you ship from!!??
if from europe im interest on buy 1 brea\ckout board with cables soon to replace mine.
best regards

My experience is similar, The boards Optimizer sells "feel" higher quality. They are heavier and thicker.
Optimizer
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August 04, 2017, 05:10:12 PM
 #70

The construction is radically different.  We designed the back plane card based on experience we have had in power systems.  The excess heating you see is inneficient, and that costs money in a miner. 

That is the main reason we went with a custom solution for ourselves.

-Optim

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www.price-technology.com
philipma1957
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August 04, 2017, 08:04:59 PM
 #71

optimizer boards are beefy and no issues with them.

I was using both his and his competitor's 2000 4000 and 2800 watt boards.

I was a little careless with  the competitors ibm 2880 breakout board and gave myself a 240 volt/30 amp circuit shock

Even with a one hand no grounding touch it still fucking hurt.

If I remember all of optimizers boards are resin coated to reduce shock risk correct?

I mine alt coins with https://simplemining.net...
I see BTC as the super highway and alt coins as taxis and trucks needed to move transactions.
Optimizer
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August 04, 2017, 09:04:22 PM
 #72

optimizer boards are beefy and no issues with them.

I was using both his and his competitor's 2000 4000 and 2800 watt boards.

I was a little careless with  the competitors ibm 2880 breakout board and gave myself a 240 volt/30 amp circuit shock

Even with a one hand no grounding touch it still fucking hurt.

If I remember all of optimizers boards are resin coated to reduce shock risk correct?


Phil, we coat all solder joint with a conformal coat.  On the high voltage leads, we use a potting compound with a dielectric strength greater than 800V/mil.  I have received some negative feedback on the potting compound as 'ugly' and have noted said concerns (though on a personal level, looks are not a thing for me in industrial situations).

We are partnering with an extruder shop to make a plastic enclosure for the power input boards for mechanical strength and to prevent shock hazards.

Though I do need to give you some flak for this Phil!  Never should anyone ever handle 240VAC systems while they are live and energized!  That should be assumed, but I am stating this for everyone to know, so that such things are not repeated.  YOU COULD DIE!

By the way, I am sitting on 1k of 6P to 6P and 6P to 6P+2Ps if y'all need.

-Optim

If you would like to E-mail me off forums, go to the Contact Us section of my website. 

www.price-technology.com
philipma1957
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August 04, 2017, 09:15:27 PM
 #73

optimizer boards are beefy and no issues with them.

I was using both his and his competitor's 2000 4000 and 2800 watt boards.

I was a little careless with  the competitors ibm 2880 breakout board and gave myself a 240 volt/30 amp circuit shock

Even with a one hand no grounding touch it still fucking hurt.

If I remember all of optimizers boards are resin coated to reduce shock risk correct?


Phil, we coat all solder joint with a conformal coat.  On the high voltage leads, we use a potting compound with a dielectric strength greater than 800V/mil.  I have received some negative feedback on the potting compound as 'ugly' and have noted said concerns (though on a personal level, looks are not a thing for me in industrial situations).

We are partnering with an extruder shop to make a plastic enclosure for the power input boards for mechanical strength and to prevent shock hazards.

Though I do need to give you some flak for this Phil!  Never should anyone ever handle 240VAC systems while they are live and energized!  That should be assumed, but I am stating this for everyone to know, so that such things are not repeated.  YOU COULD DIE!

By the way, I am sitting on 1k of 6P to 6P and 6P to 6P+2Ps if y'all need.

-Optim

I know I got lucky it was 1 hand and I was not grounded.  It is the 1 and only one time i ever did a 240 volt shock  It was a lot different then a 120 volt.

Was not your gear.  After this happened I altered it and covered  it with a safety piece of  non conductive pvc.

 Something  to keep in mind is that while a psu may be turned off  the power plug attaching to the psu can be live so be careful .

Some breakout boards not optimizers have exposed 240 volt lines so even though the psu switch is off the power plug from your pdu would be live. thus you could be shocked.

At the moment I am fairly stock with power gear.  But buysolar my solar array partner is look for spot to expand.  maybe we will add 50kwatt 24 hour array  to our 15kwatt 24 hour array  allowing us to run  65 kwatt of mining gear 24/7/365

I mine alt coins with https://simplemining.net...
I see BTC as the super highway and alt coins as taxis and trucks needed to move transactions.
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