Safety instructions
2.1 Safety instructions
SIMATIC PN/CAN LINK
10 Operating Instructions, 03/2022, A5E39895388-AC
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
May cause death or serious injury
• Voltages > 60 V DC or 30 V AC may be present in the control cabinet. Therefore
appropriate safety precautions must be taken to prevent contact during commissioning
and maintenance work.
• Before carrying out any work on the device or on connected components, make sure that
the installation is in a zero-voltage state.
Use cable types with UL approval for UL-approved systems.
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