A custom 6U extender card for military applications

The custom extender provides an interface between the standard DIN41612 connectors used in the VME64x-based test system and the high density 160-way female connectors used to connect to the board under test.

Each signal track in the ten-layer stripline extender board is protected from crosstalk from adjacent lines with ground track screening and fitted with jumper links to allow interrogation and an additional connector for a logic analyser.

The 2.54mm pitch high density female connector has round sockets that need a high insertion force to mate them fully home, a requirement driven by the application as the installed equipment is liable to be subject to high g forces and shock and vibration.

To ensure that a good connection is made when the card is plugged the extender connectors are mounted to a keyed framework that ensures correct alignment and prevents distortion and possible damage during insertion.

To interconnect between the 160-way female connector and the extender board required a custom right angle DIN41612 female connector in the extender that in turn interfaces with the high availability female connector that connects with the board under test.