Siemens SINAMICS S120 Equipment Manual page 330

Supplementary system components and encoder system integration
9.1 Sensor Modules
Table 9- 20
Encoder type
TTL
HTL unipolar
HTL bipolar
SSI
For TTL encoders at X520 → Remote Sense → 100 m
1)
Because the physical transmission media is more robust, the bipolar connection should always be
2)
used. The unipolar connection should only be used if the encoder type does not output push-pull
signals.
See the diagram "Maximum cable length depending on the SSI baud rate for SSI encoders"
3)
SSI encoder
Figure 9-16
328
Maximum encoder cable length
1)
2)
Maximum cable lengths depending on the SSI baud rate for SSI encoders
Maximum encoder cable length in m
100
100
300
100
3)
Manual, 06/2019, 6SL3097-5AL00-0BP1
AC Drive