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