Shielding, Grounding, And Equipotential Bonding - Siemens SIMOTICS-T 1FW6053-B05-0F Operating Instructions Manual

Connection

5.7 Shielding, grounding, and equipotential bonding

5.7 Shielding, grounding, and equipotential bonding
Important notes regarding shielding, grounding and equipotential bonding
The correct installation and connection of the cable shields and protective conductors is of
crucial importance, not only for personal safety but also for noise emission and noise
immunity.
Risk of electric shock!
Hazardous touch voltages can be present at unused cores and shields if they have not
been grounded or insulated.
• Connect the cable shields to the respective housings through the largest possible
• Connect unused conductors of shielded or unshielded cables and their associated
Further, unshielded or incorrectly shielded cables can lead to faults in the drive – particularly
the encoder – or in external devices, for example.
Electrical charges that are the result of capacitive cross coupling are discharged by
connecting the cores and shields.
NOTICE
Device damage as a result of leakage currents for incorrectly connected protective
conductor
High leakage currents may damage other devices if the motor protective conductor is not
directly connected to the power module.
• Connect the motor protective conductor (PE) directly at the power unit.
NOTICE
Device damage as a result of leakage currents for incorrect shielding
High leakage currents may damage other devices if the motor power cable shield is not
directly connected to the power module.
• Connect the power cable shield at the shield connection of the power module.
Note
Apply the EMC installation guideline of the converter manufacturer. For Siemens converters,
this is available under document order No. 6FC5297-□AD30-0□P□.
76
WARNING
surface area. Use suitable clips, clamps or screw couplings to do this.
shields to the grounded enclosure potential at one end as minimum.
Alternatively:
Insulate conductors and their associated shields that are not used. The insulation must
be able to withstand the rated voltage.
Naturally cooled 1FW6 built-in torque motors
Operating Instructions, 07/2017, 6SN1197-0AF02-0BP2