Siemens S120 - Page 267

Control Units, Control Unit Adapters and operating components
7.3 Control Unit CU310-2 PN (PROFINET)
AC Drive
Manual, (GH6), 04/2014, 6SL3097-4AL00-0BP4
267
Encoder cables
Encoder type
Maximum encoder cable length in m
TTL
1)
100
HTL unipolar
2)
100
HTL bipolar
300
SSI
3)
up to 100 (depending on the baud rate)
1)
100 m with remote sense
2)
Because the transmission technology 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)
For the cable length, see the diagram "Maximum cable lengths depending on the SSI baud rate for
SSI encoders"
Note
Prefabricated cable for 5 V TTL encoder
When using a 5 V TTL encoder (6FX encoder), use conn
ection cable 6FX8002-2CR00-xxx.
Figure 7-4 Maximum cable lengths depending on the SSI baud rate for SSI encoders