Siemens FS720 Mounting & Installation page 117

Building Technologies
Fire Safety
If cabling is being carried out using multiple PMI & mainboards and the FN2008, a
loop can be created accidentally. Please observe the following information.
NOTICE
Loop with Ethernet cable
Impairment of system function
● Pay attention to the Ethernet cable connection if you are connecting more
than one PMI & mainboard.
● Never connect a port P1...P4 to a port P1...P4.
FT724 Fire terminal with optional power supply and batteries
FH7201-Z3 Empty Eco housing
FDCIO222 I/O module (any I/O module possible)
LINE+ C-NET loop connection
LINE-
IN 1 Control input on separate I/O module (e.g. FDCIO222)
1 Connection for detector contact (F1, F2)
R Parallel resistor for I/O module
p
P1...P4 Electric Ethernet connections
L1+, (L2+) Vsys + system supply from fire terminal board
M1, (M2) Vsys - system supply from fire terminal board
The detector contact is normally wired on a free I/O connection of the periphery
1
board. If all connections are occupied or if using the FT724 fire terminal, the
detector contact must be connected via an I/O module (e.g. an FDCIO222). In this
instance, the signal of the I/O module must not be configured as 'Degraded alarm
relevant'.
If a station is located very close to the FT724 fire terminal, the detector contact can
also be wired directly to this station.
The parallel resistor for the detector contact depends on the I/O module used.
2
Refer to the documentation provided with the I/O module used for more details.
Use of the redundant L2+/M2 supply inputs is optional and not necessary for EN-
3
54 compatibility.
Installing, exchanging and connecting modules
Ethernet switch FN2008 and safety module FN2009
2
6
1
3
3
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2015-12-15