Absolute encoder signal over longer distances

[Roiki]

@Valentine

The question is what is the protocol and hardware. You could run any signal over a fiber-optic cable for kilometers with near-zero latency, but that would cost you both arms and legs

Any differential signaling will do. For cheap ones it’s usually just quadrature while tamagawa, yaskawa et al. Who have absolute encoder use their own digital protocols(hiperfsce, endat, biss etc).