Modifications To The Modules For Class B - Siemens FS720 Mounting & Installation

7.14.6 Modifications to the modules for class B

Building Technologies
Fire Safety
For the 'Ethernet switch (MM)' and 'Security module (firewall)' modules, the
following modifications are required to the wiring to reduce fault transmission from
limit value class A to class B:
● For each electrical Ethernet connection, one ferrite core, type Würth Elektronik,
742 701 51
● For each supply connection, one ferrite core, type Würth Elektronik, 742 715 4
P1
P2
L1+
M1
M2
L2+
RX
P1
P5
P2
TX
RX
P3
P6
P4
TX
L1+
M1
M2
L2+
Figure 80: Modifications to the wiring for class B
Installing, exchanging and connecting modules
Ethernet switch FN2008 and safety module FN2009
6
7
6
7
7
1
2
3
4
5
4
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2018-08-29