Assembling and Installing Systems
A-27
S7-400 and M7-400 Programmable Controllers Hardware and Installation
A5E00069481-04
Low-Voltage Protection 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.
Table A-5
Surge Protection Components for Lightning Protection Zones 2 <–> 3
Ser.
No.
Cables for ...
... .. equip transition point
2 <–> 3 with:
Order No.
1
3-phase TN-C-System
3 pieces
of
DEHNguard 275 surge arresters
900 600*
5SD7 030
3-phase TN-S system
4 pieces
of
DEHNguard 275 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
1 piece of
DEHNgap C N-PE surge N to PE
900 131*
AC TN-S system
2 pieces
of
DEHNguard 275 surge arresters
900 600*
5SD7 030
AC TN-C system
1 piece of
DEHNguard 275 surge arresters
900 600*
5SD7 030
AC TT system
1 piece of
DEHNguard 275 surge arresters phase
L to N
900 600*
5SD7 030
1 piece of
DEHNgap C N-PE surge N to PE
900 131*
2
24 VDC Power Supply
1 piece of
Blitzductor VT lightning conductor, type
AD 24 V
918 402*
3
Bus cable
•
MPI RS 485
•
Blitzductor CT surge arrester, type
MD/HF
919 506* and
919 570*
•
RS 232 (V.24)
1 piece of
•
per conductor pair low-voltage pro-
tection FDK 2 12 V
919 995*
4
Inputs of digital modules
•
24 VDC
1 piece of
Low-voltage surge arrester,
type FDK 2 60 V on insulated rail
919 993*
2 pieces
of
Surge arresters
•
120 VAC
•
DEHNrail 120 FML
901 101*
•
230 VAC
•
DEHNrail 230 FML
901 100*
5
Outputs of digital modu-
les 24 VDC
1 piece of
Low-voltage protection FDK 2 D 5 24
919 991*
6
Outputs of analog modu-
les up to 12 V +/–
1 piece of
Low-voltage protection,
type FDK 2 12 V on insulated rail con-
nected with M– of the power supply for
the modules.
919 995*
*
You can order these components directly at:
DEHN + SÖHNE
GmbH + Co. KG
Elektrotechnische Fabrik
Hans-Dehn-Str. 1
D-92318 Neumarkt
