Siemens SIMATIC NET PROFIBUS User Manual
Page 258
Lightning and Surge Voltage Protection for LAN Cables Between Buildings
B-4
PROFIBUS Networks SIMATIC NET
6GK1970-5CA20-0AA1 Release 2 05/2000
PLC
PLC
PLC
PLC
Coarse protection at
entry to building
Fine protection
close to
first
nodes
Underground cable,
potential equalization
cable
Same protection
for further cable entry or
exit necessary
Figure B-1
Lightning Protection Concept for LAN Cables Between Buildings
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