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Position and assignment
L1+
M
Figure 5-1
Contact
L1+
M
External power supply
Note
Permitted external power supplies
The power supply unit to supply the SCALANCE TAP must comply with the requirements for a
limited power source according to IEC/EN60950-1, section 2.5.
The external power supply for the SCALANCE TAP must meet the requirements for NEC class 2
circuits as specified in the National Electrical Code ® (ANSI/NFPA 70).
Refer to the section "Safety when connecting up (Page 29)" and the installation instructions and
instructions for use of the manufacturer of the power supply, the battery or the accumulator.
5.4
Grounding
EMC disturbances are diverted to ground via ground. This increases the immunity of the data
transmission.
It is crucial for the correct operation of ground that the connection to the reference potential
surface always has low impedance. Such a connection of the functional ground of the device
SCALANCE TAP
Operating Instructions, 06/2022, C79000-G8976-C447-03
s
L1+
M
NEC CLASS2
24V 0,06A
Position of the power supply on the SCALANCE TAP and the assignment of the terminal block
Assignment
24 VDC
Ground
Functional ground, refer to the section Grounding (Page 33)"
SCALANCE
TAP104
Connecting up
5.4 Grounding
33
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