Siemens SINAMICS S120 Combi - Page 260

Encoder system connection
10.2 Sensor Module Cabinet-Mounted SMC30
260
SINAMICS S120 Combi
Manual, (GH9), 07/2016, 6SL3097-4AV00-0BP5
Maximum encoder cable lengths
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
Encoders with 5 V supply without remote sense connected at X521/X531
For encoders with a 5 V supply at X521/X531, the encoder current drawn depends on the
cable length (for 0.5 mm
2
cable cross-sections):