Ethernet Switch In The Ethernet Network - Siemens FN2012-A1 Mounting & Installation

4.5 Ethernet switch in the Ethernet network

Building Technologies
Siemens Industry, Inc.
The basic circuit diagram below shows the possible applications of the Ethernet switch
in a redundant Ethernet ring network.
Panel
Switch3
Switch1 Switch2
P1
P0
P2 P3 P4 P5
MoNet
MoNet
Ethernet
PMI & Mainboard
Panel
Figure 12: Ethernet switch in a redundant Ethernet ring network
There are 3 types of Ethernet ring wiring, depending on the Ethernet module in use:
● Electric Ethernet with copper wiring via 10/100BaseT connections (RJ-45
connector) with a VN2001 module – max. 330 ft/100 m long
● Optical Ethernet with a fiber-optic 100BaseFX connection in multi-mode version
with a VN2002 module – max. 13100 ft/4 km long
● Optical Ethernet with a fiber-optic 100BaseFX connection in single-mode version
with a VN2003 module – max. 131000 ft/40 km long
The type of ring wiring between each switch is independent and can be selected at will.
A maximum of 32 switches are allowed for each Ethernet ring.
The switch built into an FS20 panel is supplied via the MoNetBus from the
PMI & mainboard. If the switch is built into another housing or device, it is supplied with
power via a 24 V current-limited and supervised power supply that has been approved
for use in fire detection.
Ethernet switch in the Ethernet network
Panel
Switch4
Optical or electrical Ethernet Ring
P0 P1
P2 P3 P4 P5
MoNet
Ethernet
MMS
24V supply
Wiring
4
Switch xx
P0 P1
P2 P3 P4 P5
MoNet
MoNet
Ethernet
PMI & Mainboard
Panel
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2018-09-07