Siemens SIMATIC NET SCALANCE W786C Series, Руководство по эксплуатации

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Connection
5.2 Lightning protection, power supply and grounding
SCALANCE W786C
42
Operating Instructions, 07/2019, A5E03692138-12
Notice for USA/Canada (UL Requirements)
When an external antenna or the device itself is located outdoor:
- The Ethernet-Port (RJ45) is considered a TNV-1 circuit (according IEC 60950-1).
Connected Ethernet circuits must fulfill TNV-1 requirements (SELV circuits are not sufficient).
- The device must be properly earthed at the chassis earthing terminal.
- The 12 – 24 V power supply lines of the device are considered a TNV-1 circuit. Connected
power supply circuits must fulfill TNV-1 requirements. The PS791-2AC power supply may be
connected directly to 100 – 240 C AC primary circuits. The 100 – 240 AC wiring system must
be conducted to conduits. This wiring system (including conduits) shall be secured before
installation of the product, for example by using an outlet box, according to NEC or CEC.
When the device is located indoor:
- The Ethernet Port (RJ45) is considered a SELV circuit (according IEC 60950-1). All
connected Ethernet circuits must fulfill SELV requirements and shall be entirely contained
within a single low-voltage power distribution and within a single building.
- Do not connect any external LAN-circuit, powersupply or antenna coming from outdoor.
WARNING
EXPLOSION HAZARD
Do not connect or disconnect cables to or from the device when a flammable or
combustible atmosphere is present.
WARNING
EXPLOSION HAZARD
Replacing components may impair suitability for Class 1, Division 2 or Zone 2.
WARNING
EXPLOSION HAZARD
Do not open the device when the supply voltage is turned on.
General notes on use according to ATEX and IECEx
WARNING
Take measures to prevent transient voltage surges of more than 40% of the rated voltage.
This is the case if you only operate devices with SELV (safety extra-low voltage).