Siemens Simatic Operating Instructions Manual page 12

Safety instructions
2.1 Safety instructions
Safety information
Connection only over safety extra-low voltage / protective extra-low voltage
May cause death or serious injury
The device is designed for operation using directly connectable safety extra-low voltage
(SELV) with safe electrical separation according to IEC 60950-1 / EN 60950-1 /
VDE 0805-1 or IEC 61131-2 / EN 61131-2 / DIN EN 61131-2.
To obtain the safe property of low-voltage circuits of the PN/CAN LINK, the 24 V rated
voltage supply and external connections to communication interfaces must be supplied
from approved sources that meet requirements set forth by various standards for
SELV/PELV voltage-limited sources.
Therefore only connect safety extra-low voltages (SELV) with safe electrical separation
according to IEC 60950-1 / EN 60950-1 / VDE 0805-1 to the supply voltage connections
and the communications interfaces.
Working on the device or on connected components
Risk of electric shock
May cause death or serious injury
• Voltages > 60 V DC or 30 V AC may be present in the control cabinet. Therefore
• Before carrying out any work on the device or on connected components, make sure
• Use cable types with UL approval for UL-approved systems.
10
WARNING
WARNING
appropriate safety precautions must be taken to prevent contact during commissioning
and maintenance work.
that the installation is in a zero-voltage state.
SIMATIC PN/CAN LINK
Operating Instructions, 03/2018, A5E39895388-AB