Installation; Important Notes On Using The Device - Siemens SIMATIC NET 12M Operating Instructions Manual

Installation

To prevent injury and damage, read the manual before using the device.
2.1

Important notes on using the device

Read the safety notices
Note the following safety notices. These relate to the entire working life of the device.
Power supply
The device is designed for operation with a directly connectable safety extra low voltage (SELV)
from a limited power source (LPS).
The power supply therefore needs to meet at least one of the following conditions:
• Only safety extra low voltage (SELV) with limited power source (LPS) complying with IEC
• The power supply unit for the device must meet NEC Class 2 according to the National
If the equipment is connected to a redundant power supply (two separate power supplies),
both must meet these requirements.
If a device is operated in an ambient temperature of more than 60 ℃, 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 60 ℃.
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 60 ℃, only use cables with admitted maximum operating temperature of at least 80
℃.
12M bus terminal
Operating Instructions, 06/2022, C79000-G8976-C333-02
CAUTION
WARNING
60950‑1 / EN 60950‑1 / VDE 0805‑1 or IEC 62368-1 / EN 62368-1 / VDE 62368-1 may be
connected to the power supply terminals.
Electrical Code (r) (ANSI / NFPA 70).
WARNING
WARNING
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