User`s manual

Electromagnetic Compatibility Measures for Bus Adapter 170 INT 110 03
47
Shield grounding
with protection
devices
Direct or indirect shield grounding are offered by the protection devices. An indirect
grounding occurs using gas conductors.
The construction of the shield grounding depends on the type of lightning arrestor.
Lightning
arrestor type
Direct shield grounding Indirect shield grounding using gas
conductors
CT B110 Connect the shield of the incoming
remote bus cable at connection IN
and that of the remote bus cable at
connection OUT. The shields are
now galvanically connected with
PE.
Connection of the shield as described
for direct shield grounding.
Put the gas conductor in the unit
underneath the shield connection
terminal on the input side.
EMC cage clamp terminals fasten the remote bus cable shield on the input
and output sides.
VT RS485 Connect the shield of the incoming
remote bus cable at connection
IN2 and that of the remote bus
cable at connection OUT2.
Connect the shield of the incoming
remote bus cable at connection IN1,
and the remote bus cable shield at
connection OUT1. The gas conductor is
installed in the device.
Note: Connect the grounding terminals of the lightning arrestor to the PE.
Note: Further information about grounding and shield grounding can be found in
the relevant installation instructions that come with the lightning arrestor.