Siemens SINAMICS S120 Manual page 252

Control Units, Control Unit Adapters and operating components
7.4 Control Unit CU310-2 DP (PROFIBUS)
Encoder cables
Encoder type
TTL
HTL unipolar
HTL bipolar
SSI
100 m with remote sense
1)
Because the transmission technology 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.
For the cable length, see the diagram "Maximum cable lengths depending on the SSI baud rate for
3)
SSI encoders"
Note
Prefabricated cable for 5 V TTL encoder
When using a 5 V TTL encoder (6FX encoder), use connecting cable 6FX8002-2CR00-....
Figure 7-11
252
1)
2)
3)
Maximum cable lengths depending on the SSI baud rate for SSI encoders
Maximum encoder cable length in m
100
100
300
up to 100 (depending on the baud rate)
Manual, (GH6), 07/2016, 6SL3097-4AL00-0BP5
AC Drive