QPS1 Equivalent (HCBB-75W) Questions

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Conjure
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QPS1 Equivalent (HCBB-75W) Questions

Post by Conjure » Mon Mar 04, 2019 10:50 am

Hey all,

I'm moving my personal system over to Dotcom, and I really, really don't want to spent $200 on Dotcom's QPS1. It's just a HCBB-75W with some wiring and MTA connectors added. I can get a HCBB-75W for $40-50.

Does anyone have a clear picture of how they wire them, though? I can get all the MTA connectors needed to connect to Q101 and Q102, I just want to make sure it's wired correctly.

And yes, I know. I don't need the "mains voltage" talk. :)

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Rex Coil 7
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Re: QPS1 Equivalent (HCBB-75W) Questions

Post by Rex Coil 7 » Mon Mar 04, 2019 1:36 pm

Conjure wrote:Hey all,

I'm moving my personal system over to Dotcom, and I really, really don't want to spent $200 on Dotcom's QPS1. It's just a HCBB-75W with some wiring and MTA connectors added. I can get a HCBB-75W for $40-50.

Does anyone have a clear picture of how they wire them, though? I can get all the MTA connectors needed to connect to Q101 and Q102, I just want to make sure it's wired correctly.

And yes, I know. I don't need the "mains voltage" talk. :)
These are pictures I have from previous postings and private messages to other members that go back to 2017. It's all I have. The descriptions and notes in the pictures were meant for other discussions, not anything I did focused for you in particular. So don't take anything said in the pictures personally.



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Conjure
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Post by Conjure » Mon Mar 04, 2019 1:44 pm

Holy shit, you're a legend. Thank you!

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hamildad
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Post by hamildad » Mon Mar 04, 2019 4:06 pm

Incredibly useful...

I was stumped on the pairing the 5V -out to common for weeks....



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JohnLRice

Post by JohnLRice » Mon Mar 04, 2019 11:32 pm

REX RULES! :yay: :tu:

From another recent thread on a similar subject here's some of my experiences:
viewtopic.php?t=2628
viewtopic.php?t=8935
viewtopic.php?t=19389

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Side note regarding sense line connections: While it seems most people say you should or must connect the sense poles, it is unnecessary. Yes, it says so in the power supply documentation, at least with Power One / Bel Power supplies, although it is a bit buried in the doc, and not on the data sheet you can find online but the folded up tiny print doc that comes with the supplies. It says something like there are resistors on the PCB that connect the sense poles to the voltage rail poles so that using jumpers between the poles isn't necessary and you only need to use the sense connections if you are powering a load that is a significant distance away from the supply.

Of course I don't think it will hurt anything to connect them so, either way is fine, I just think it's a bit of harmless disinformation that I occasionally try to rectify! :nod: :spin:

EDIT: If TLDR here is info from my last post of the last of the above threads, read the post below to better understand the pictures (I use AC inlets that can be switched between 120v and 220v input so transformer jumpers need to be removed if present):
viewtopic.php?p=265275#265275
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