> Canon datasheets say, the Canon LiDE 210 has 2.5 W max power in work,
> 1.4 W in standby and 11 mW in suspend.
> Is there any way to determine (via sane) if it is in standby or
> suspend? Can it be switched between standy and suspend?
SANE doesn't provide an interface for such information. You should
look into libusb for this.