Safety Extra-Low Voltage - Siemens SIMATIC NET SCALANCE XR124WG Manual

WARNING
Danger due to
damaged/unapproved parts
If you use damaged/unapproved parts,
there is no guarantee that the device
will function according to the
specification. If you use
damaged/unapproved parts, this can
lead to the following problems:
• Injury to persons
• Loss of the approvals
• Violation of the EMC regulations
• Damage to the device and other
components
Use only undamaged/approved parts.
Measures to take in high
ambient temperatures
If a device is operated in an ambient
temperature of more than 40 °C, the
temperature of the device housing may
be higher than 70 °C. The device must
therefore be installed so that it is only
accessible to service personnel or
users that are aware of the reason for
restricted access and the required
safety measures at an ambient
temperature higher than 40 °C.
Suitable cables at a high
ambient temperature
If the cable or conduit entry point
exceeds 70 °C or the branching point
of conductors exceeds 80 °C, special
precautions must be taken. If the
equipment is operated in an air
ambient in excess of 50 °C to 60 °C,
only use cables with admitted
maximum operating temperature of at
least 85 °C.
WARNING
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).

Safety Extra-Low Voltage

If using power sources according to
NEC Class 2 or LPS, please note the
following information:
The equipment is designed for
operation with Safety Extra-Low
Voltage (SELV) by a Limited Power
Source (LPS). This means that only
SELV / LPS complying with IEC
60950-1 / EN 60950-1 / VDE 0805-1
must be connected to the power supply
terminals, or the power supply unit for
the equipment power supply must
comply with NEC Class 2, as
described by the National Electrical
Code (r) (ANSI / NFPA 70). If the
equipment is connected to a redundant
power supply (two separate power
supplies), both must meet these
requirements.
24 VDC power supply
The device is designed for operation
with a directly connectable safety
extra-low voltage (SELV).

Continued
A5E39701956-AB, 09/2017
English