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Technical Information
Chapter
4
RFU63x
Electrical installation
8014335/YUO7/2016-04-04
©
SICK AG · Germany · All rights reserved · Subject to change without notice
43
Even in the event of large differences in the ground potential, ground loops are effectively
prevented, meaning that equalizing currents can no longer flow via the cable shields and
metal housing.
Important!
The power supply for the RFU630 and the connected peripheral devices must also guaran-
tee the required level of insulation.
Under certain circumstances, a tangible potential can develop between the insulated metal
housings and the local ground potential.
Special national regulations for Sweden and Norway
Varning och atjarder
Utrustning som ar kopplad till skyddsjord via jordat vagguttag och/eller via annan utrustning
och samtidigt ar kopplad till kabel-TV nat kan i vissa fall medfora risk for brand.
For att undvika detta skall vid anslutning av utrustningen till kabel-TV nat galvanisk iso-
lator finnas mellan utrustningen och kabel-TV natet.
Advarsel og tiltaker
Utstyr som er koplet til beskyttelsesjord via nettplugg og/eller via annet jordtilkoplet utstyr
- og er tilkoplet et kabel - TV nett, kan forarsake brannfare.
For a unnga dette skal det ved tilkopling av utstyret til kabel-TV nettet installeres en gal-
vanisk isolator mellom utstyret og kabel-TV nettet.
Corresponding English translation
Devices which are connected to the electrical system PE of the building via a mains connec-
tion or other devices with a connection to the PE, and which are connected to a cable distri-
bution system with coaxial cables, can under certain circumstances cause a risk of fire.
Connections to a cable distribution system must therefore be made such that electrical
insulation is offered below a certain frequency range (galvanic separating link).
electrically
insulatetd
grounding point 2
grounding point 3
grounding point 1
grounding potential difference
U
shielded electrial cable
PLC
Reading clock
sensor
RFU630