Siemens SIMATIC NET S7-1200 Kompaktbetriebsanleitung Seite 6

WARNING
Safety notices for operation with a power supply according to "Limited Energy"
1. If the device is supplied by a power supply with limited power (Limited Energy) that complies with IEC/UL61010-1 or VDE
0805-1, no additional power limitation is required according to National Electrical Code (r) (ANSI/NFPA 70).
If the device is connected to a redundant power supply (two separate power supplies), there must be a fuse between
each of the two power supplies and each power supply input of the device. The fuses must ensure that the sum of the
power at the two power supply inputs does not exceed 100 W.
2. If the device is operated with a power supply for without power limitation and the entire power requirement does not
exceed 100 W, a fuse must be installed between the power supply and each supply input of the device to meet the
requirements for limited power (Limited Energy) according to IEC/UL61010-1 or VDE 0805-1. For more information, see
"Suitable fusing for the power supply cables" below.
If the device is connected to a redundant power supply (two separate power supplies), there must be a fuse between
each of the two power supplies and each power supply input of the device. The fuses must ensure that the sum of the
power at the two power supply inputs does not exceed 100 W.
3. If the device is operated with a power supply without power limitation and the entire power requirement exceeds 100 W,
the device must be installed in a fire protection housing according to ANSI/UL-61010-1:2018, paragraph 9.3.
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:
–
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)
• In other areas, the fuse must meet the following requirements:
–
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
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:
–
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
• In other areas, the fuse must meet the following requirements:
–
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
* AC or DC depending on availability
)
3 Safety notices when using in accordance with UL 61010-2-
201/CSA C22.2 No.61010-2-201
If you use the device under UL 61010-2-201/CSA C22.2 No. 61010-2-201 conditions, you must observe the following safety
notices:
6
and protects against currents > 3 A.
(min. 60 V / 3 A)
)
(min. 60 V / 3 A)
)
(min. 60 V / 3 A)
)
(min. 60 V / 3 A)
)
(corresponds to melting integral I
n
n
t < 4320)
2
Compact Switch Module CSM 1277 G2
A5E54595177-AA, 06/2025