The document introduces the absolute rotary encoder GBMMW of Baumer. The product adopts optical scanning principle, the total resolution can be up to 31 bits, and single turn or multi turn function can be selected. It has high shock and vibration resistance and can be connected to CANopen, DeviceNet, EtherCAT, EtherNet-IP, SAEJ1939, LWL, PROFINET, Power over EtherCAT, POWERLINK, Profibus and SSI buses.