Safety notes
Control Units CU240S
2-4 Operating Instructions, 11/2006, A5E00766042B AA
Operation
Warning
The SINAMICS G120 inverters operate at high voltages.
When operating electrical devices, it is impossible to avoid applying hazardous voltages to
certain parts of the equipment.
Emergency Stop facilities according to EN 60204, IEC 204 (VDE 0113) must remain
operative in all operating modes of the control equipment. Any disengagement of the
Emergency Stop facility must not lead to an uncontrolled or an undefined restart of the
equipment.
Certain parameter settings may cause the SINAMICS G120 inverter to restart automatically
after an input power failure, for example, the automatic restart function.
Wherever faults occurring in the control equipment can lead to substantial material damage
or even grievous bodily injury (that is, potentially dangerous faults), additional external
precautions must be taken or facilities provided to ensure or enforce safe operation, even
when a fault occurs (e.g. independent limit switches, mechanical interlocks, etc.).
Motor parameters must be accurately configured for motor overload protection to operate
correctly.
This equipment is capable of providing internal motor overload protection according to
UL508C. Refer to P0610 and P0335, i²t is ON by default.
Only Control Units with fail-safe functions can be used as an "Emergency Stop Mechanism"
(see EN 60204, section 9.2.5.4).
Repair
Warning
Repairs on equipment may only be carried out by Siemens Service, by repair centers
authorized by Siemens or by authorized personnel who are thoroughly acquainted with all
the warnings and operating procedures contained in this manual.
Any defective parts or components must be replaced using parts contained in the relevant
spare parts list.
Disconnect the power supply before opening the equipment for access.
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