Siemens Simatic S7-300 CPU 31xC Series Installation And Operating Instructions Manual page 234

Appendix
A.3 Lightning and surge voltage protection
Table A-9 Surge-protection components for lightning protection zones 1 <-> 2
Consec. Cables for ...
no.
1 3-phase TN-C system
3-phase TN-S system
3-phase TT system
AC TN-S system
AC TN-C system
AC TT system
2 24 VDC power supply
3 Bus cable
MPI, RS485
•
RS232 (V.24)
•
4 Inputs of digital modules DC 24 V
5 Outputs of digital modules 24 V
6 Inputs/outputs of digital modules
120 VAC
•
230 VAC
•
7 Inputs of analog modules up to
12 V +/-
* Please order these components directly from:
DEHN + SÖHNE
GmbH + Co. KG
Elektrotechnische Fabrik
Hans-Dehn-Str.
D-92318 Neumarkt
A-24
... equip transition point
1 <-> 2 with:
3 x DEHNguard 275 surge arresters
4 x DEHNguard 275 surge arresters
3 x DEHNbloc/275 surge arrester, phase
L1/L2/L3 to N
1 x DEHNgap C, N-PE surge arrester, N
to PE
2 x DEHNguard 275 surge arresters
1 x DEHNguard 275 surge arresters
1 x Surge arrester DEHNguard 275
phase L to N
1 x N-PE surge arrester DEHNgap C
N to PE
1 x Blitzductor VT, type AD 24 V
Blitzductor CT surge arrester, type
•
MD/HF
per cable pair
1 x •
Blitzductor CT surge arrester,
type ME 15 V
1 x Low-voltage surge arrester
type FDK 2 60 V
1 x Low-voltage surge arrester
2 x Surge arrester
DEHNguard 150
•
DEHNguard 275
•
1 x Low-voltage surge arrester
Blitzductor CT, type MD 12 V
Operating Instructions, Edition 08/2004, A5E00105492-05
Order number
900 600*
5SD7 030
900 600*
5SD7 030
900 600*
5SD7 030
900 131*
900 600*
5SD7 030
900 600*
5SD7 030
900 600*
5SD7 030
900 131*
918 402*
919 506* and
919,570*
919 506* and
919 522*
919 993*
919 991*
900 603*
900 600*
919 506* and
919 541*
S7-300, CPU 31xC and CPU 31x: Installation