Siemens SINAMICS DCM Operating Instructions Manual page 163

For encoders with a 5 V supply at X521/X531, the cable lengths (for 0.5 mm
sections) depend on the sensor current:
Figure 7-9 Max. cable length as a function of the encoder current drawn
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).
SINAMICS DCM Control Module
Operating Instructions, 06.2010, C98130-A7067-A1-02-7619
Additional system components
7.2 Sensor Module Cabinet-Mounted SMC30
cable cross-
2
163