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This topic comprises 2 pages: 1 2
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Topic: JNIOR in a drawer
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Marcel Birgelen
Film God
Posts: 3357
From: Maastricht, Limburg, Netherlands
Registered: Feb 2012
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posted 03-17-2019 03:18 AM
Although a metal case will be quite a bit more expensive than a plastic one, I also would say that it should be a metal case.
Like Steve mentioned, my preference is also a properly grounded chassis. There isn't also a whole lot of other 19" rack mountable equipment I can think of, that comes in a plastic case.
If you want to make a rack-mount kit instead of a dedicated rack-mountable version, which I think, is fine, then you could go for a tray solution, rather than a totally enclosed box.
This tray wouldn't need a top cover, the side and back-walls don't need to be full height either. It also woudln't need to be a drawer, so no expensive rails either. Two-post mountable should be more than sufficient.
On this tray, you could make some slots for the JNIOR itself and maybe two to three modules. Personally, I like when it's properly fixed, not just crammed in there. So something with screws or a decent clip-in solution would be great, also maybe some perforations in the base plate to be able to strap some cables together. Also, put some cheap, compatible cable straps into the package and you'll be the hero. ![[Wink]](wink.gif)
You could also make the front panel switchable between a control panel or just a blank with a Integ / JNIOR label on it, so people at least know what's behind there.
Also, I would make the power supply a part of the solution. Something with a standard IEC C12 connector would be welcome. It would make it easier to directly connect it to an UPS and not having another PSU block dangling around on your already crowded PDUs is worth something. It would also make international options simpler, since the only thing you need to swap is the power cable.
quote: Bruce Cloutier
If the unit is that short then you have issues accessing the connections from the rear especially if there is hardware directly above and/or below. That's where I get into thinking about creative approaches. I understand the cabling issue with the drawer or in removing the unit to access connections on the back.
The solution will never be perfect for all scenarios, so a good trade-off should be made. I guess it would help if your solution is at least 2U high, even if it fits in 1U and if you make it at least about 12" deep. That should also provide ample space to allow more than just the JNIOR in there. (Hint: PSU, extra modules )
Nobody is able to cram their hands into a deep 1U space, but 2U is usually doable, at least if you don't need to reach all the end of the rack when it's crammed between two extra-deep units.
If you could combine the control panel with the tray (optionally or not), then there is even less of a discussion why you would require two rack units for something that could fit in one.
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Marcel Birgelen
Film God
Posts: 3357
From: Maastricht, Limburg, Netherlands
Registered: Feb 2012
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posted 03-17-2019 10:46 AM
quote: Bruce Cloutier
I get the service loop and moving cable management issue. I note that some keyboard drawers have a hinged conduit where cables can be strapped and made to fold behind the drawer in a controlled fashion.
I hate those frick'n things and I know I'm not the only one. Many server manufacturers, including Dell use those "cable management arms" and they're hell to work with.
In order to securely fit the cables, you have to strap them extremely tight, often too tight for comfort. (Cable straps that are too tight can damage the copper and fiber wire cores of cables, often not immediately, but over time, by over-stressing it. I've seen this happen with UTP Cat5e and Cat6 cabling myself) You're bending your cables uncontrollably while you pull out the tray, not all cables like being bent back-and-forth all the time, especially not around the often rather tight corners as often is the case in such arm-solutions.
Also, there never seems to be sufficient space inside the cable arm to fit all the cables. Additionally, you're combining signalling and power into one small space, increasing the chance of interference and which in some localities is even against the code.
The last Dell server I bought, had the cable arm at an ~$80 up-charge, so those things possibly aren't entirely cheap to engineer and produce either.
Also, those cable management arms tend to get stuck between other stuff in the rack, like that new cable that some guy ran by it, without realizing the potential of it getting stuck in there...
Don't overthink it.
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