On Ativars ATV61, ATV71, can I use PTC connected to LI6 and external 24V for logic inputs at the same time?

Yes it is possible. Wiring in attachment
Do not forget to set SW2 switch = PTC
To enable PTC monitoring, in Drive menu - Fault management - LI6 as PTC = (anything different from "no")

Released for: Schneider Electric USA