Connecting up
6
6.1
Safety when connecting up
Safety notices
When connecting up the device, keep to the safety notices listed below.
If using power sources according to NEC Class 2 or LPS, please note the following information:
WARNING
The equipment is designed for operation with Safety Extra-Low Voltage (SELV) by a Limited
Power Source (LPS).
This means that only SELV / LPS complying with IEC 60950-1 / EN 60950-1 / VDE 0805-1 must
be connected to the power supply terminals, or the power supply unit for the equipment power
supply must comply with NEC Class 2, as described by the National Electrical Code (r) (ANSI /
NFPA 70).
If the equipment is connected to a redundant power supply (two separate power supplies),
both must meet these requirements.
WARNING
Do not remove or replace while circuit is live when a flammable or combustible atmosphere is
present.
Note
No light power measurement (PROFINET diagnostics)
The devices do not support diagnostics with light power measurement.
Safety notices on use in hazardous areas
General safety notices relating to protection against explosion
WARNING
EXPLOSION HAZARD
Do not connect or disconnect cables to or from the device when a flammable or combustible
atmosphere is present.
SCALANCE XR-300WG
Operating Instructions, 03/2021, C79000-G8976-C454-07
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