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sinara-hw / Kasli

Kasli is a powerful FPGA carrier, capable of controlling 12 Eurocard extension modules.
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Extend Kasli to 220mm #11

Closed hartytp closed 4 years ago

hartytp commented 6 years ago

This is something I'd personally be very keen on for the next batch of Kasli. We will make heavy use of those extra EEM slots (SU-servo eats EEMs), and this gets rid of the annoying BP adapter + associated mechanical issues. Most racks I've looked at work fine with 220mm eurocards.

sbourdeauducq commented 6 years ago

Oh right, I misunderstood what was meant by "merge with its backplane". Then this sounds fine to me. Though we definitely need to improve the FPGA cooling situation, as it is easy to get it to overheat with just 8 EEMs...

marmeladapk commented 4 years ago

I extended Kasli, but not to 220mm. @gkasprow requested that I conserve some space for a CPCI backplane adapter. For EEM8-11 connectors I used the same layout as on backplane adapter for easier routing.

                       8  9
0  1  2  3  4  5  6  7 10 11
jordens commented 4 years ago

Fine. What about reducing the space between the IDC connectors?

  1. IME the IDC connectors can only be detached by pulling on the ribbon.
  2. The standard way of crimping ribbon cables is such that the ribbon is pointing to the front panel on one end, i.e. "the wrong way".
  3. An IDC strain relief clamp that folds the cable can only be used on 8HP cards.

Therefore adding a IDC ribbon strain relief on the Kasli end is convenient and addresses all three constraints.

gkasprow commented 4 years ago

True. The 3M strain relief IDC assemblies enable higher density packaging of IDC headers. They can be pulled by the ribbon.

marmeladapk commented 4 years ago

@jordens Reducing the space between IDC connectors is a minor change that requires a lot of work.

jordens commented 4 years ago

ACK. This was only meant to point out a possible way to save space if you need it.