Conveyor Tracking - Encoder

Greetings UR community,

I was looking forward to try out the conveyor tracking mode on an UR5. Thus, I came across with some problems, namely the type of encoder I should use. I thought about an incremental encoder but I don’t know if the robot is able to perceive data coming from an PNP encoder (the incremental encoders I found were all open collector, hence, NPN). If you could give me a hand I would be thankful