Looking for Connector Ideas

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I'm working on a flight computer system ( primarily for high powered rocketry ) and my current issue is finding the best connector for the communication system. The modules will be connected through a CAN bus ( running at full 1Mbps ) so at a minimum I need three signal lines ( twisted pair ) and shielded cable. The other requirements are small size and weight of the connector along with polarization and positive locking.

Since a rocket can accelerate at greater than 20 gees, positive locking is a necessity. I have considered both connector integral locking, and external locking ( something like rectangular IDC connectors with a custom lock, and for simplicity sake I prefer locking integral to the connector if possible. But here's the real problem. With any luck the system will be able to fit in a minimum diameter 38mm rocket. The board with the largest number of CAN connections ( up to 8 ) will need to fit into a cylinder of 38mm diameter. That knocks out standard DB-9 connectors and even RJ-45 which could be nice otherwise.

Any ideas would be greatly appreciated as I'm running out of ideas myself.

Martin Jay McKee

As with most things in engineering, the answer is an unabashed, "It depends."

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Harwin Datamate series connectors are 2mm pitch, 1 or 2 row connectors with optional latches. We use them in applications in the 100s of gs.

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Thank you. Indeed those look like they may be just what is needed... time for more study.

Martin Jay McKee

As with most things in engineering, the answer is an unabashed, "It depends."