Siemens SIMATIC NET PROFIBUS - 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 PLCPLC
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