I am using a compact logix processor with a 1769 HSC card and am unsure which encoders to buy. The application is for a shelf loading carousel system.
Consider a ferris wheel with 50 cars for the first encoder, I will want to re zero the value when each car hits a datum point. The second encoder is on a drive which pushes product into the path of each car prior to the car arriving at the loading area. This is mechanically cammed and a motor drives continually in the same direction while an arm pushes product in and retracts to home in a continuous move.
One further consideration is either drive could be inched slowly in reverse from time to time to escape a jam
I would like to keep it simple and hopefully deal with just a numeric value each time

Thanks

You will need an encoder with an A, B, and Z marker.

Of the most popular encoders, one with a Push-Pull or Differential Line Driver will work. I personally prefer the DLD as I have been told they are more noise immune at longer distances.

The 1769-HSC can handle 5-24 VDC.

Do you have a particular encoder brand in mind?

No, anything reasonably priced,what would you recommend. resolution is not an issue and the operation is multi turn, my thought was to use an Incremental, do you agree,