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Electronic Theatre Controls Inc

CEM+ hardware and software version compatibility

There are several hardware limitations to software versions you can load.  Look at the motherboard of your CEM+.  It will either be a green board or a blue board.  If it is a blue board, check the revision on the sticker shown below circled in red.


  • Green boards can take any software version.
  • Rev.E and earlier blue boards can take any version 2.0 and higher.
  • Rev.F and higher blue boards should NOT be loaded with Vsn3.1.0 or lower as there is a voltage measuring glitch that could come up intermittently.
  • Rev.H and higher blue boards can ONLY take versions 3.1.2 and 3.1.3.  These will have a sticker stating as such (shown above circled in yellow).
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