I figured it out, for anyone else with this question, yes you do need some sort of external brake control in addition to DCS, at least that's what I'm gathering from my conversations with Fanuc. I did find one made by Fanuc already integrated into the controller with part number A05B-2605-C400.
Do you happen to know the part number for the cable that connects the the brake unit to the 6-axis servo amplifier via the CRM97 connector?
