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Controllers
![UCC AI](/cmmsupport/knowledgebase/media/img/gen/d4d67486c45e42e5a391f5232c8ac9d2.jpg)
The UCC AI is required for large higher voltage CMM systems which may require motor voltages in excess of 80 V or motor currents in excess of 10 A.
![UCC PI 80](/cmmsupport/knowledgebase/media/img/gen/b349758e0bc6479a83049b6c21c0c58f.jpg)
The UCC PI 80 is required for CMM systems which are fitted with Renishaw's SP80 scanning probe and facilitates the use of the UCC S3 as the machine controller.
![PHC10-3 PLUS](/cmmsupport/knowledgebase/media/img/gen/4e976f66a9ef4a719f7316dfd3bed27d.jpg)
PHC10-3 PLUS head controller receives instructions from the CMM control. The PHC10-3 PLUS controls all head functions and reports system status to the CMM:
![ACC2-3](/cmmsupport/knowledgebase/media/img/gen/a10c1e5c038442e8a0208e5390aa3698.jpg)
The ACC2-3 handles the communications to and from the CMM controller, controls the ACR1 autochange rack and multiplexes and interfaces the head and datum probe signals.