Connecting; Safety When Connecting Up - Siemens SIMATIC NET SCALANCE XR-500 Operating Instructions Manual

Connecting

6.1

Safety when connecting up

Safety notices
When connecting up the device, keep to the safety notices listed below.
Safety information for devices with 24 V DC power supply
Observe the following note for device variants with supply voltage 24 V DC:
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
SCALANCE XR-500
Operating Instructions, 09/2018, A5E03275845-12
WARNING
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