Modular crate electronics: Difference between revisions

Revision as of 18:49, 28 July 2016

Revision as of 18:39, 2 November 2016

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=== CAMAC ===

A later crate standard is [[Computer Automated Measurement and Control|Computer Automated Measurement and Control, or CAMAC]].<ref>{{cite web|title=AN INTRODUCTION TO CAMAC|url=http://www-esd.fnal.gov/esd/catalog/intro/introcam.htm|publisher=FNAL|accessdate=21 September 2013}}</ref> CAMAC modules are much thinner than NIM modules. The backplane connector of a CAMAC module is a card-edge connector; because of the possibilities of mis-aligning the connectors upon plugin, CAMAC modules are NOT [[hot swap]]pable. The CAMAC backplane contains a signallysignaling protocol for the crate controller to set the values of registers in modules (for configuration) and to read values of registers (for data acquisition). Due to the slowness of the data communication along the backplane, once FASTBUS was invented, CAMAC modules were mostly used for modules that needed to be computer-configured but not for data acquisition.

=== FASTBUS ===

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[[VMEbus|VME]] (VMEbus) was a bus originally designed to provide an expansion bus for the Motorolla 68000 series processor, but it also became a module electronics crate standard. The first editions of VME were three pins wide with pin sockets on the modules and pins on the backplane. In later editions of the physical standard expanded the connectors with two more rows of pins/sockets on the edges for grounding.

VME was mostly designed as a computer bus, so its modules were largely data acquisitioniacquisition modules, not modular electronics.

==See also==