D-2 Fine Protection Of Lines By Means Of Overvoltage-Protection Components - Siemens SIMATIC S5 Manual
Distributed i/o system
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The ET 200 distributed I/O system and lightning protection
Rules for the 1
2
interfaces and
higher
(local potential
equalization)
Additional
measures
Table D-2 Fine protection of lines by means of overvoltage-protection components
Ser.
Lines for ...
No.
1
Three-phase TN-C system
Three-phase TN-S and TT systems
Alternatiing current TN-L, TN-S, TT
systems
2
24 V DC supply
3
SINEC L2 bus line
4
Inputs/outputs of digital modules
24 V DC
110/220 V AC
Inputs/outputs of analog modules
up to
12 V
up to
24 V
up to
48 V
1
Order components directly from: DEHN + Soehne, Elektrotechnische Fabrik, Hans-Dehn-Str. 1, 92318 Neumarkt,
Germany
2
Order numbers as per catalog Service XV 10. The order number of this catalog is: E89700-S1034-X-A3.
D-6
The rules for all lightning-protection zone interfaces 1
follows:
Provide local potential equalization at each lightning-protection zone
interface.
At all lightning-protection zone interfaces, include all lines (e.g. metal
pipes, etc.) in the local potential equalization measures.
Include all metal fittings inside the lightning-protection zone in the local
potential equalization system (e.g. metal components inside lightning
protection zone 2 must be included in measures implemented at the 1
interface).
We recommend the installation of fine protection:
for all lightning-protection zone interfaces 1
for all lines longer than 100 meters inside a lightning-protection zone.
... at the 1
3 pcs. DEHNguard 275 overvoltage diverter
4 pcs. DEHNguard overvoltage diverter 275
2 pcs. DEHNguard 275 overvoltage diverter
1 pc. Blitzductor KT, Type AD 24 V
up to 500 kbaud: 1 pc. Blitzductor KT, Type
ARE 8 V
over 500 kbaud: 1 pc. Blitzductor KT, Type
AHFD 5 V
1 pc. Blitzductor KT, Type AD 24 V
2 pcs. DEHNguard 150 overvoltage diverter
1 pc. Type FDK 12 V OV terminal
1 pc. Type FDK 24 V OV terminal
1 pc. Type FDK 60 V OV terminal
2 and higher and
2 interface and higher, install:
ET 200 Distributed I/O System
2 and higher are as
2
Order No.
1
900 600
1
900 600
1
900 600
2
DSN: 919 253
2
DSN: 919 232
2
DSN: 919 270
2
DSN: 919 253
1
900 603
2
DSN: 919 999
2
DSN: 919 998
2
DSN: 919 997
EWA 4NEB 780 6000-02a
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