Why JIIA focuses on connectors with the CoaXPress standard

With interface standards, the supported connectors are included.  It might seem that this would not be complex and the possibilities would be limited.  But if it not controlled there can easily be over 100 different types of connectors making designing, purchasing, and upgrading confusing and risky.

With the CoaXPress standard, JIIA manages the connector options to support design requirements without letting the options get unnecessarily large.  Recently it has become needed to include more connectors to support speed requirements and rugged environments.  These have been added carefully under close monitoring with the CoaXPress working group.  Here we provide some details on the standard connectors.

When the CoaXPress version 1.1 was released in April of 2013 one of the biggest changes was the introduction of support of the DIN connector in addition to the existing BNC.  New products were increasingly using DIN connectors because of the multi-way options, and they support the needs in future CXP versions as speeds increase beyond the current 6.25 Gbps. For cameras with the CoaXPress interface mostly a DIN 1.0/2.3 connector (IEC 61169-29) is used. 

The locking option for the DIN connector that has typically been used is push pull. By pushing the sleeve on the (cable) plug towards the receptacle, connection can be made. By pulling the sleeve, the connection can be disengaged or by pushing the sleeve towards the receptacle.  This locking does not prevent rotation and because of play between sleeve and connector the connector can move a little.
 For many applications this is not an issue, but for systems that experience shock and vibration such as in global security, interruptions in the interconnection can occur resulting in in signal loss or even burned contacts with PoCXP (Power over CoaXPress).

With the next version of the standard, DIN1.0/2.3 connectors with a screw lock that makes the connector better suitable for rugged environments will be included.  The screw is a coupling mechanism that consists of a coupling nut (on the plug) and a thread (on the socket). The tightening torque is achieved by hand. The engagement and separation force depends on the mechanical dimensions of the inner and outer contacts of the plug and socket.


Here are some suppliers with the screw lock DIN connector available for CXP1.1 cameras and frame grabbers:

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