Connecting up
SCALANCE MUM856-1
Operating Instructions, 08/2021, C79000-G8976-C628-02
41
Safety notices for operation with a power supply not complying with NEC Class 2
If you operate the device in a control cabinet, you can use a power supply that does not
comply with NEC Class 2. When connecting up the device, keep to the safety notices listed
below.
WARNING
Safety extra low voltage
The device is designed for operation with a directly connectable safety extra-low voltage
(SELV) according to UL/IEC 61010-1 and UL/IEC 61010-2-201 whose output power
corresponds to "Limited Energy" according to UL/IEC 61010-1.