Siemens FS20 Mounting & Installation page 256

Mounting and installation of the compact control panels
5
Ethernet switch FN2008 and safety module FN2009
5.37.4.2 Connector strip for supply
256 | 354
Building Technologies
Fire Safety
1 Ethernet connection to PMI & mainboard
2 Optical Ethernet (loop network)
P1...P4 Electrical Ethernet ports
P5, P6 Optical Ethernet ports
RX Optical receiver channel
TX Optical transmission channel
Wiring
WARNING
Heavily concentrated light
Eye damage
● Do not look into the red light of the transmitter (TX).
● The fiber optic cable is wired cross-wise:
The optical transmitter (TX) of one port must always be connected to the other
switch with the optical receiver (RX) of the other port.
● The bending radius of the fiber optic cable must not be less than 20 mm.
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.
Pin Designation
1 L1+
2 M1
3 M2
4 L2+
The L1+/M1 and L2+/M2 connections are designed for redundant supply and are
not plated-through. Use of the redundant L2+/M2 supply inputs is optional and not
necessary for EN-54 compatibility.
Description
Supply input 1 (+DC 24 V)
Supply input 1 (DC 0 V)
Redundant supply input 2 (DC 0 V), optional
Redundant supply input 2 (+DC 24 V), optional
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2016-01-27