Siemens FS20 - Modifications to the Modules for Class B

Mounting and installation of the compact control panels
Ethernet switch FN2008 and safety module FN2009
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Building Technologies
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Fire Safety
2016
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5.37.6 Modifications to the modules for class B
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
Figure 138: Modifications to the wiring for class B
P5
P6
RX
TX
RX
TX
P1
P2
P3
P4
1
P1
P2
L1+
L2+
M1
M2
L1+
L2+
M1
M2
3
7
2
4
6
5
4
6
7