Connecting; Safety Instructions And Guidelines - Siemens SIMATIC PN/M-Bus LINK Operating Instructions Manual

Connecting

7.1

Safety instructions and guidelines

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.
In order to maintain the safe characteristics of the low voltage circuits of the PN/M-Bus
LINK, the 24 V rated voltage supply and external connections to communication ports must
be supplied from approved sources which meet the requirements of 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 are present in the control cabinet. Therefore appropriate
• Before working on the PN/M-Bus LINK or connected components, make sure that the
PN/M-Bus LINK
Operating Instructions, 03/2018, A5E44260928-AA
WARNING
WARNING
safety precautions must be taken to prevent contact during commissioning and
maintenance work.
system is de-energized.
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