Installation manual

Assembling and Installing Systems
A-26
S7-400 and M7-400 Programmable Controllers Hardware and Installation
A5E00069481-04
Low-Voltage Protection Elements for 1<–> 2
For the transition points between lightning protection zones 1 <–> 2 we
recommend the surge protection components listed in table A-4
Table A-4 Low-Voltage Protection Components for Lightning Protection Zones 1 <–> 2
Ser.
No.
Cables for ... ... equip transition point 1 <–> 2 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 arrester,
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
surge arrester Blitzductor CT
type ME 15 V
919 506* and
919 522*
4 Inputs of digital modules 24
VDC
1 piece of Low-voltage surge arrester,
type FDK 2 60 V
919 993*
5 Outputs of digital modules 24
VDC
1 piece of Low-voltage surge arrester
FDK 2D5 24
919 991*
6 Inputs/outputs of digital
modules
2 pieces
of
Surge arresters
• 120 VAC • DEHNguard 150 900 603*
• 230 VAC • DEHNguard 275 900 600*
7 Inputs of analog modules up
to 12 V +/–
1 piece of Surge arrester
Blitzductor CT type MD 12 V
919 506* and
919 541*
* You can order these components directly at: DEHN + SÖHNE
GmbH + Co. KG
Elektrotechnische Fabrik
Hans-Dehn-Str. 1
D-92318 Neumarkt