Siemens SINAMICS S120 Equipment Manual page 331

Encoders with 5 V supply connected to X521/X531
For encoders with 5 V supply at X521/X531 (no Remote Sense available), the maximum
cable length
a 0.5 mm
Figure 9-17
When encoders without Remote Sense are used, the permissible cable length is limited to
1)
100 m because the voltage drop depends on the cable length and the encoder current.
AC Drive
Manual, 06/2019, 6SL3097-5AL00-0BP1
Supplementary system components and encoder system integration
depends on the encoder current. The following diagram shows an example of
1)
conductor cross section.
2
Max. cable length as a function of the encoder current drawn
9.1 Sensor Modules
329