After reading the yaskawa Sigma-5 servo manual, and confirming with a yaskawa engineer, I learned that 11 VDC-24 VDC can be used for the amp enable circuit.  What this meant to me was a drastic simplification in wiring.  I am using 12V from the DMC board for amp enable, and now my connectors are a single cable, from the galil axis to the CN-1.  Drives are working great with this configuration.

Didn't know where else to put this.  This is great news for me, so I thought I would share it.

Rob