KC868-AP — Power injection, multi-PSU, and amplifier support

[stansvec]

Hello,
Could you please confirm these points for KC868-AP (PWM dimmer for LED strips):

1. Power injection: Is it supported to inject extra DC power along the LED strip? Any rules or limits?
   
2. Multiple PSUs: Is it allowed to use more than one DC power supply for different channels/zones? If yes, how should they be connected? If no, must we use only one PSU?
   
3. Amplifier / power repeater: Can the KC868-AP PWM outputs drive an external analog LED amplifier (RGB/RGBW) so the strip is powered by a local PSU? Any specs/models to follow?
   

Thank you.