Siemens SINAMICS S120 Combi - Page 246

Encoder system connection
10.2 Sensor Module Cabinet-Mounted SMC30
SINAMICS S120 Combi
246 Manual, 11/2017, 6SL3097-4AV00-0BP7
Maximum encoder cable lengths
Note
The maximum cable lengths according to the following table must not be exceeded even
when longer cable lengths can
be calculated.
Table 10- 14 Maximum encoder cable length
Encoder type
Maximum encoder cable length in m
TTL
1)
100
HTL unipolar
2)
100
HTL bipolar
300
SSI
100
3)
1)
For TTL encoders at X520 → remote sense → 100 m
2)
Because the physical transmission media is more robust, the bipolar connection should always be
used. The unipolar connection should only be used if the encoder type does not output push-pull
signals.
3)
See the diagram "Maximum cable length depending on the SSI baud rate for SSI encoders"
SSI encoder
Figure 10-9 Maximum cable length depending on the SSI baud rate for SSI encoders