Siemens SCALANCE XR524-8C Operating Instructions Manual page 46

Connecting
5.1 Commissioning
Operation only with safety extra-low voltage
The device is designed for operation with a directly connectable safety extra-low voltage
(SELV). (This does not apply to 100 to 240 V devices).
This means that only safety extra-low voltages (SELV) complying with IEC 60950-1 / EN
60950-1 / VDE 0805-1 may be connected.
If the equipment is connected to a redundant power supply (two separate power supplies),
both must meet these requirements.
Suitable fusing for the power supply cables
The current on the terminal must not exceed 25 A.
Use a fuse, that protects against currents > 25 A. The fuse must meet the following
requirements:
In areas according to NEC or CEC:
• Suitable for DC (min. 60 V / 25 A)
• Breaking current at least 10 kA
• Approval according to ANSI/UL 248-1
• Suitable for the protection of DC power supply circuits
In other areas:
• Suitable for DC (min. 60 V / 25 A)
• Breaking current at least 10 kA
• Approval in compliance with IEC 60127-1 / EN 601127-1
• Breaking characteristics: B or C for circuit breakers and fuses
• Suitable for the protection of DC power supply circuits
In areas subject to the NEC or CEC:
Safety notice for connectors with LAN (Local Area Network) marking
A LAN or LAN segment, with all its associated interconnected equipment, shall be
entirely contained within a single low-voltage power distribution and within a single
building. The LAN is considered to be in an "environment A" according to IEEE802.3
or "environment 0" according to IEC TR 62102, respectively.
Never connect directly to TNV-circuits (Telephone Network) or
WAN (Wide Area Network).
46
WARNING
WARNING
Operating Instructions, 05/2014, A5E03275845-05
SCALANCE XR-500