Safety Information - Siemens SINAMICS S120 Manual

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8.10 K50, Sensor Module Cabinet-Mounted SMC30
8.10.2

Safety information

NOTICE
Only one measuring system can be connected to each Sensor Module.
Note
There must be no electrical connection between the measuring system housing and the
measuring system electronics (this requirement is fulfilled for most encoder systems). If this
is not carefully observed, under certain circumstances the system will not be able to reach
the required noise immunity (there is then a danger of equalization currents flowing through
the electronic ground).
CAUTION
If screw terminals are used, the signal cable must be shielded and connected to the shield
contact provided over a large surface area.
CAUTION
Connecting cables to sensors must always be installed with shielding. The cable shield
must be connected to the ground potential at both ends over a large surface area.
Connecting cables that are routed together with the motor cable must be twisted in pairs
and shielded separately.
354
Cabinet Modules
Manual, (GH5), 05/2010, A5E03263538A