BALLUFF-Leuze has released the 2400/2420 miniature encoder series by Kuebler. The encoders meet EN 50121-3-2 and EN 61326-1 standards, commonly referred to as railway standards.
These incremental devices are available in either solid shaft or hollow-shaft versions and have a 24mm outside diameter. The range also meets the EMC guidelines 89/336/EWG.
Compared to the standards that apply in normal industrial applications, rail applications have particular electromagnetic compatibility requirements. The use of overhead power lines and modern power electronics causes interference emissions across a wide band that can particularly affect control electronics. As many functions have to do with safety, it is imperative that the sensors function correctly even in difficult EMC environments. The IP64-protected encoders offer high EMC resistance with their maximum speed of up to 12,000 rpm. This allows high resolutions and high continuous rotation with a maximum pulse frequency of 160kHz.
The connections are protected against reversed polarity and a short-circuit. The built-in ageing compensation ensures that even after many years the device puts out signals that have a clear phase shift of 90º. The normal operating temperature is from -20°C to 85°C. The housing is resistant to oil and acids.
In addition to railway applications the encoders can be used in pick and place machines (SMT robots), handling machines for electronic components, quality testing machines, laser and inkjet printers, medical technology, mail stuffing machines, labelling machines or for controlling the camera in pipe-inspection machines.