Please Note:  A relay adapter box is needed between the newer autoguiders with a digital interface (e.g. ST-7, ST-8, ST-9, ST-10, PixCel 255 and PixCel 237) and any CCD Autoguider jack on JMI equipment.  The adapter provides complete electrical isolation between the autoguider and the CCD Interface.  A relay box can be purchased from SBIG or Meade.  Failure to use a relay adapter box between an autoguider with digital interface and JMI equipment will void the JMI warranty.   No relay box is needed for the ST-4, ST-5 and ST-6.