Siemens SIMATIC NET SCALANCE M874 Operating Instructions Manual page 55

NOTICE
Suitable fuse for the power supply cables (corresponds to "Limited Energy")
The current on the terminal may not exceed 3 A. Use a fuse for the power supply that is suitable
for protection of AC/DC power supply circuits *
• In areas subject to the NEC or CEC, the fuse must meet the following requirements:
• In other areas, the fuse must meet the following requirements:
If the properties of the supplying current source are known, the following fuse is also possible:
• In areas subject to the NEC or CEC, the fuse must meet the following requirements:
• In other areas, the fuse must meet the following requirements:
* AC or DC depending on availability
)
Safety notices on use in hazardous areas
General safety notices relating to protection against explosion
EXPLOSION HAZARD
Do not connect or disconnect cables to or from the device when a flammable or combustible
atmosphere is present.
SCALANCE M874, M876
Operating Instructions, 02/2023, C79000-G8976-C331-12
– Suitable for AC/DC *
– Breaking current at least 10 kA
– Approval according to ANSI/UL 248-14 (suppl. fuses), ANSI/UL 248-4 (Class CC), ANSI/UL
248-8 (J), ANSI/UL 248-15 (T), or CSA C22.2-4 No. 248.14 (suppl. fuses), No. 248-4
(Class CC), No. 248-8 (J), No. 248-15 (T)
– Suitable for AC/DC *
– Breaking current at least 10 kA
– Approval according to IEC/EN 60947‑1/2/3 or IEC/EN 60898-1/2 for circuit breakers
– Breaking characteristics: B or C
– Approval according to IEC/EN 60127-1 for fuses
– Breaking characteristics: max. 120 s at 2 x I
– Suitable for AC/DC *
– Breaking current > highest possible current of the current source (incl. short circuit
current and fault)
– Approval according to UL 1077 or CSA C22.2 No. 235
– Suitable for AC/DC *
– Breaking current > highest possible current of the current source (incl. short circuit
current and fault)
– Approval according to IEC/EN 60934
– Breaking characteristics: max. 120s at 2 x I
WARNING
and protects against currents > 3 A.
)
) (min. 60 V / 3 A)
) (min. 60 V / 3 A)
n
(min. 60 V / 3 A)
)
(min. 60 V / 3 A)
)
n
5.1 Safety when connecting up
(corresponds to melting integral I
Connecting up
2 t < 4320)
55