Siemens SIMATIC ET 200AL System Manual page 2248

Lightning protection and overvoltage protection
7.3 Rules and components for the transitions between lightning protection zones
Rule for transition from lightning protection zone 0
Lightning protection equipotential bonding is required at the transition from lightning
protection zone 0
protection zone 0
● Use of lightning arresters prevents introduction of partial lightning currents into structural
● Creation of local equipotential bonding at the transition of lightning protection zones, with
incorporation of metallic supply systems (for example, pipes, air ducts, cable channels or
cable ducts)
Components for lightning protection equipotential bonding from lightning protection zone 0
The following table shows components for lightning protection equipotential bonding from
lightning protection zone 0
Table 7- 2
Seq.
no.
1
2
3
4
5
6
7
8
9
10
30
to 1. The following applies to the transition at the interface of lightning
A
to 1:
A
systems
Components for transition from lightning protection zone 0
Cables for ... Connection at the 0
S7-1500/ET 200MP/ET 200SP/ET 200AL
Three-phase DEHNventil® DV M TNC 255
TN-C system
DEHNventil® DV M TNC 255 FM *
Three-phase DEHNventil® DV M TNS 255
TN-S system
DEHNventil® DV M TNS 255 FM *
Three-phase DEHNventil® DV M TT 255
TT system
DEHNventil® DV M TT 255 FM *
AC DEHNventil® DV M TN 255
TN-S system
DEHNventil® DV M TN 255 FM *
AC DEHNventil® DV M TT 2P 255
TT system
DEHNventil® DV M TT 2P 255 FM *
Supply BLITZDUCTOR® XT, base section BXT BAS
U = 24 V DC
BLITZDUCTOR® XT, module BXT ML2 B 180
N
(I
Supply DEHNbloc® M, DB M 1 150
U = 24 V DC
N DEHNbloc® M, DB M 1 150 FM *
(2 pieces required)
Bus cable BLITZDUCTOR® XT, base section BXT BAS
MPI RS 485,
BLITZDUCTOR® XT, module BXT ML2 B 180 (2-wire)
RS 232 (V.24)
Inputs/outputs of BLITZDUCTOR® XT, base section BXT BAS
digital modules
BLITZDUCTOR® XT, module BXT ML4 B 180
U = 24 V DC
(I
N
Inputs/outputs of DEHNbloc® M, DB M 1 255
digital modules
DEHNbloc® M, DB M 1 255 *
U = 230 V AC
N (2 pieces required)
to 1
A
to 1.
A
interface to 1 with:
A
= 1.2 A) (2-wire)
L
= 1.2 A) (4-wire)
L
to 1
A
Designing interference-free controllers
Function Manual, 06/2014, A5E03461486-AB
to 1
A
Article
number
951 300
951 305 *
951 400
951 405 *
951 310
951 315 *
951 200
951 205 *
951 110
951 115 *
920 300
920 211
961 110
961 115 *
920 300
920 211
920 300
920 310
961 120
961 125 *