Siemens SIMATIC S7-1500 System Manual page 73

Connecting
6.1 Rules and regulations for operation
Specific application
Observe the safety and accident prevention regulations that are applicable to specific
applications (for example the Machinery Directive).
EMERGENCY STOP devices
EMERGENCY STOP devices pursuant to IEC 60204 (corresponds to DIN VDE 0113) must
remain effective in all operating modes of the plant or system.
Closed-loop control for secure operation
The following measures are also to be taken and adapted to your conditions for the secure
operation of your plant:
● An EMERGENCY STOP concept in accordance with applicable engineering practice (for
example European standards EN 60204, EN 418 and related standards).
● Additional measures for limiting axis limits (for example hardware limit switches).
● Devices and measures for protecting motors and power electronics in line with the
SINAMICS design guidelines.
We also recommend conducting a risk assessment in accordance with the essential
safety requirements / Annex 1 to the EC Machinery Directive to identify hazards for the
plant as a whole.
Excluding hazardous plant states
Hazardous operating states must not occur in the following situations:
● The plant restarts after a voltage dip or power failure.
● Bus communication is reestablished following a fault.
● An undefined system state occurs.
If a hazardous operating state occurs, force an EMERGENCY STOP.
An uncontrolled or undefined system startup must not occur after the EMERGENCY STOP
device is unlocked.
Line voltage
The points to note for line voltage are set out below:
● For fixed plants or systems without an all-pole mains disconnect switch, the building
technology must include a mains disconnect device (all-pole).
● For load power supplies and power modules, the configured rated voltage range must
correspond to the local line voltage.
● For all power circuits of the system, the fluctuation/deviation of line voltage from the rated
value must be within the permitted tolerance.
You can find more information in the section Specifications for insulation tests, protection
class, degree of protection, and rated voltage (Page 276).
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SIMATIC Drive Controller
System Manual, 11/2019, A5E46600094-AA