The universal encoder system U-ONE from Johannes Huebner Giessen offers ten function modules in a single unit. The FOC decoder module is one of the possible modules available to acquire optical signals from the basic unit and supply power to the electronic function modules.

Other function modules belonging to the U-ONE system offer the following functions: Speed detection, position detection, electronic overspeed switch including programmable switching speeds from 0.63 rpm, various bus interfaces, diverse Ethernet connections, electronic cam controller, synchronization module and graphic display of sequential processes.