Siemens SINAMICS S120 Manual page 288
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- Function manual (1094 pages) ,
- Diagnostic manual (947 pages) ,
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Encoder system connection
9.9 Sensor Module External SME25
Note
Current controller clock cycle
For a current controller clock cycle of 31.25 µs, an SME25 with article number
6SL3055-0AA00-5HA3 must be used.
The maximum cable length for the encoder system interface depends on the current
consumption of the encoder system and the cross-section of the wire in the cable. However, the
maximum length is 30 m. The figure below applies to encoder systems that operate in the supply
voltage range between 4.75 V and 5.25 V. The sample parameters shown are 0.28 mm² cross-
section (0.14 mm² supply plus 0.14 mm² Remote Sense wires) and 0.64 mm² (0.5 mm² supply
plus 0.14 mm² Remote Sense wires).
Figure 9-37
Max. cable length as a function of the current drawn by the encoder system
In addition to the encoder systems for the supply voltage range of 4.75 V to 5.25 V in the diagram
above, encoder systems are also available for the extended range down to 3.6 V. These are
generally operable using encoder system cables up to 30 m in length, provided that the total
cross-section of the supply plus Remote Sense wires does not fall below 0.14 mm².
286
Control Units and additional system components
Equipment Manual, 06/2020, 6SL3097-5AH00-0BP2
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