Siemens SIMATIC NET SCALANCE W786C Series, Руководство по эксплуатации

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Connection
5.6 Connecting a power supply adapter
SCALANCE W786C
Operating Instructions, 07/2019, A5E03692138-12
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Note
Applies only to SCALANCE W786-2
If a SCALANCE W786-2 is operated with six external antennas, the power supply for 12 to
24 VDC cannot be supplied redundantly. In this case, there is no further opening in the
housing for a second power cable.
WARNING
Danger from line voltage
Only electrical specialists may open the device and connect the power supply adapter.
Connect or disconnect power supply cables only when the power is turned off.
Start the SCALANCE W786 only when you have screwed down the housing cover again so
that there is once again protection against touching live parts.
NOTICE
Exceeding the EMC limit values
SCALANCE W786 with RJ-45 interface with DC power supply adapter or without power
supply adapter
When using a SCALANCE W786 with RJ-45 connector without a power supply adapter or
with a DC power adapter, no additional measures are necessary for use in a residential
environment.
SCALANCE W786 with RJ-45 interface with AC power supply adapter PS791-2AC
When using a SCALANCE W786 with a power supply adapter PS791-2AC (100 to 240
VAC), the requirements for use in an industrial environment are met without any additional
measures being necessary.
When used in a residential environment, noise produced by this configuration can be
reduced by fitting an EMC ferrite (a snap ferrite) to the power supply cable as close as
possible to the power supply adapter.
If you use the power supply adapter PS791-2AC (100 to 240 V AC voltage) in a domestic
area (EMC class B), fit an EMC ferrite (a snap ferrite) to the supply cable as close as
possible to the power supply adapter. This measure is unnecessary in an industrial
environment.
You can order suitable ferrites from the following company:
Würth Elektronik eiSos GmbH & Co. KG
Max-Eyth-Strasse 1-3; 74638 Waldenburg, Germany
Model designation: STAR-TEC with safety lock
cable diameter 6 – 7.5 mm, article number: 74271131
cable diameter 7 – 8.5 mm, article number: 74271132