Assortment / System Description

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Technically speaking, the IP
1)
router is not identical with the area/line couplers.
Instead of having a connection within KNX, a "KNX - IP network" connection is
established. In that case, an IP router connects a KNX area or KNX line to an IP
network.
1)
IP = Internet Protocol: Network protocol for data traffic, routing and with internetworking for global
addressing.
5WG1 146-1AB02, short product no. N146/02.
Bus connection via terminals, IP network connection via RJ45.
In extensive networks, the bus must be powered via power packs. Commercially
available power supply units are rated at 160, 320 and 640 mA.
Power supply units for KNX networks without
IP router.
5WG1 125-1AB02, short product no. N125/02, current output 160 mA
5WG1 125-1AB12, short product no. N125/12,
current output 320 mA
Power supply units for KNX networks with
IP router.
5WG1 125-1AB22, short product no. N125/22, current output 640 mA
For more information about Siemens area/line couplers, IP routers and power supply units, visit
www.siemens.com/knx-td
Large plants
When engineering and commissioning large plants, the following points must be
observed:
In the case of lines, the maximum permissible cable length is 1,000 meters. If the
network’s topology exceeds that limit, area/line couplers and power supply units
are required.
A maximum of 64 bus devices may be installed on one line. If the number of bus
devices installed in a plant exceeds 64, they must be distributed to different lines
and/or areas.
If the devices do not power the bus (e.g. third-party products), a power supply unit
for the bus must be installed on each line (main line 15 and line 15.1, or other lines
15.x, if present).
Large plants necessitate LTE-compatible area/line couplers.
For coupling KNX with IP networks, LTE-compatible IP routers are required.
Area/line couplers and IP routers must contain the predefined LTE filter table
because it enables LTE telegrams to be filtered, thus reducing the amount of
data traffic.
The predefined LTE filter table is contained in Siemens’ area and line coupler
N140/13 and in Siemens’ IP router N146/02.
IP router
Siemens IP router
Bus power supply units
Siemens
power supply units
Engineering and
commissioning
Cable lengths
Number of bus devices
Bus power supply
Area and line couplers
IP routers
LTE filter table