Connecting up
4.3 Power supply
SCALANCE M874, M876
Operating Instructions, 08/2018, C79000-G8976-C331-08
47
Note
Permitted external power supplies
The power supply unit to supply the SCALANCE M87x must comply with the requirements
for a limited
power source according to IEC/EN 60950-1, section 2.5.
The external power supply for the SCALANCE M87x must meet the requirements for NEC
class 2 circuits as specified in the National Electrical Code ® (ANSI/NFPA 70).
Refer to the section Connecting up (Page 43) and the installation instructions and
instructions for use of the manufacturer of the power supply, the battery or the accumulator.
Note
External power supply for operation in China
The device may only be used with an external power supply that has a CCC approval.
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