Wiring
ET 200iS Distributed I/O Station
6-10
A5E00087831-02
6.4.3
Rules for the Interface between Lightning Protection Zones 0...1
Rule for the interface 0A <-> 1 (lightning protection equipotential bonding)
The following measures are suitable for lightning protection equipotential bonding
at the interface lightning protection zone 0 <-> 1:
•
Keep lightning stroke currents away from hazardous areas and cables that lead
into hazardous areas.
•
Define the zone transition 0
A
<-> 1 in the non-hazardous area.
Since this zone transition is not relevant for the typical applications of the ET 200iS,
this will be discussed in no further detail in this manual.
Rule for the interface 0B <-> 1 (strong electromagnetic coupling)
The following measures are suitable for overvoltage protection at the interface
lightning protection zone 0
B
<-> 1:
•
Use conductive spiral metal bands or metal braids, grounded at both ends as
the cable shields, for example, NYCY or A2Y(K)Y
•
and run the cables
–
through metal pipes without breaks and grounded at both ends or
–
in conduits of reinforces concrete with interconnected armour or
–
on closed metal cable racks grounded at both ends.
•
as an alternative, you can use fiber-optic cable instead of metal cables.
Additional Measures
If you are not able to take the measures outlined above, provide protection at the
interface 0
B
<-> 1 with a surge voltage protector. The following table lists the
components you can use to provide coarse protection for your system.
Lightning protection zone 1 can, for example, be defined as the interior of a
building with a shielded outer skin or as the interior of a metal distributor. If the
shielding effect of the building outer skin is uncertain, the metal distributor is
preferable. We recommend that you install overvoltage protection devices for the
signal lines in metal distributors. The protective devices for the 24 V supply must
be integrated in an explosion-proof enclosure and should also be installed in the
metal distributor.
Содержание SIMATIC ET 200iS
Страница 20: ...Preface ET 200iS Distributed I O Station 1 6 A5E00087831 02 ...
Страница 34: ...Product Overview ET 200iS Distributed I O Station 2 14 A5E00087831 02 ...
Страница 84: ...Installation ET 200iS Distributed I O Station 5 18 A5E00087831 02 ...
Страница 168: ...Maintenance ET 200iS Distributed I O Station 8 6 A5E00087831 02 ...
Страница 184: ...Terminal Modules ET 200iS Distributed I O Station 10 8 A5E00087831 02 ...
Страница 188: ...Power Supply Module ET 200iS Distributed I O Station 11 4 A5E00087831 02 ...
Страница 320: ...Dimension Drawings ET 200iS Distributed I O Station 17 4 A5E00087831 02 ...
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Страница 335: ...Certifications ET 200iS Distributed I O Station A5E00087831 02 20 5 20 1 2 Interface module IM151 2 ...
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Страница 390: ...12 Product Information to the manual Distributed I O device ET 200iS Version 10 2001 A5E00163808 02 ...
Страница 416: ...26 Product Information RS 485 IS Coupler 6ES7 972 0AC80 0XA0 A5E00207628 01 ...
Страница 417: ...27 Product Information RS 485 IS Coupler 6ES7 972 0AC80 0XA0 A5E00207628 01 ...
Страница 418: ...28 Product Information RS 485 IS Coupler 6ES7 972 0AC80 0XA0 A5E00207628 01 ...
Страница 419: ...28 Produktinformation RS 485 IS Koppler 6ES7 972 0AC80 0XA0 A5E00207082 01 ...
Страница 420: ...28 Product Information RS 485 IS Coupler 6ES7 972 0AC80 0XA0 A5E00207628 02 ...