5.8.1 Maximum permissible cable length
Maximum length for motor cables
The permissible length of the motor cable depends on the quality of the motor power cable and
the converter pulse frequency. The values specied below are applicable for high quality cables,
such as CY100 or similar, and for the pulse frequencies set in the factory.
If you set other pulse frequencies, then you must ensure that the EMC category is complied
with on the plant or system side.
Cable type Shield Max. length (for converter with integrated line
lter)
Second environment, C2
Motor cable Shielded, coverage≥85%,
rated voltage 1000V
Wall-mounted variant 15 m (49 ft.)
Maximum length for control cables
Cable type Shield Max. length
Digital input/output Unshielded/shielded 30 m (98 ft.)
Encoder Shielded, coverage≥85% 30 m (98 ft.)
Maximum length for communication cables
Communications protocol Transfer rate or cable type Max. length
PROFINET CAT5e network cable 100 m (328 ft.)
AS-i Maximum length per segment 100 m (328 ft.)
The maximum length of any one segment on the AS-i network is normally 100m; however,
there are a number of devices that allow the overall length of AS-i network to be extended.
For more information, see the FAQ at the following link:
AUTOHOTSPOT
See also
Current derating as a function of the pulse frequency (Page420)
Derating of motor cable length based on pulse frequency and surrounding temperature
(Page421)
AS-i FAQ (https://support.industry.siemens.com/cs/ww/en/view/21189154)
Wiring
5.8Cables and connectors
SINAMICS G115D Wall Mounted distributed drive
Operating Instructions, 07/2023, FW V4.7 SP14, A5E52808211A AA 65
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