Assembling and Installing Systems

A-27

AutomationSystem S7-400 Hardwareand Installation
A5E00850741-01
Low-VoltageProtection Elements for 2< --> 3

For the transition points between lightning protection zones 2 <-->3 we

recommend the surge protection components listed in the table below.This

low-voltage protection must be used in S7-400 for CE compliance.

TableA-5 Surge Protection Components for Lightning Protection Zones 2 <-->3
Ser.
No.
Cablesfor ... ... .. equiptransition point
2< -->3 with:
OrderNo.
13-phase TN-C-System 3pieces of DEHNguard 275 surge arresters 900 600*
5SD7 030
3-phase TN-S system 4 pieces of DEHNguard275 surge arresters 900 600*
5SD7 030
3-phase TT system 3 pieces of DEHNguard 275 surge arresters
phase L1/L2/L3 to N
900 600*
5SD7 030
1pieceof DEHNgapC N-PE surge N to PE 900131*
AC TN-S system 2 pieces of DEHNguard275 surge arresters 900 600*
5SD7 030
AC TN-C system 1pieceof DEHNguard275 surge arresters 900 600*
5SD7 030
AC TT system 1pieceof DEHNguard275 surge arresters
phase L to N
900 600*
5SD7 030
1pieceof DEHNgapC N-PE surge N to PE 900131*
224 VDC Power Supply 1pieceof BlitzductorVT lightning conductor,
type AD 24 V
918 402*
3Bus cable
•MPI RS 485 •Blitzductor CT surge arrester,type
MD/HF
919 506* and
919 570*
•RS 232 (V.24) 1pieceof •perconductor pair low-voltage
protection FDK 2 12 V 919 995*
4Inputs of digital modules
•24 VDC 1pieceof Low-voltagesurge arrester,
type FDK 2 60 V on insulated rail
919 993*
2 pieces of Surgearresters
•120 VAC •DEHNrail 120 FML 901 101*
•230 VAC •DEHNrail 230 FML 901 100*
5Outputs of digital modu-
les 24 VDC
1pieceof Low-voltageprotection FDK 2 D 5 24 919 991*
6Outputs of analog modu-
lesupto12V+/--
1pieceof Low-voltageprotection,
type FDK 2 12 V on insulated rail con-
nected with M--of the power supply
for the modules.
919 995*
* Youcan order these components directly at: DEHN + SÖHNE
GmbH + Co. KG
Elektrotechnische Fabrik
Hans-Dehn-Str.1
D-92318 Neumarkt