Siemens S120 Manual page 377

Encoders without remote sense
For encoders without Remote Sense, the permissible cable length is restricted to 100 m.
Reason: The voltage drop depends on the cable length and the encoder current.
Figure 8-18
Figure 8-19 Position of the zero pulse to the track signals
AC Drive
Manual, (GH6), 04/2014, 6SL3097-4AL00-0BP4
Supplementary system components and encoder system integration
Signal characteristic of track A and track B between two edges: Time between two edges
with pulse encoders
8.1 Sensor Modules
377