User Manual

15-16
Siemens Switzerland Ltd www.siemens.com/gamma 2019
Building Technologies Division
Technical Information and Application Examples
Application Examples
Remote access to a KNX system via the Internet
Easy remote access
In almost every project, changes are often requested during building
completion or after the building goes into operation, for example if
the set lighting times are too long. Up to now this meant making an
appointment with the customer, driving to the property, changing the
parameter settings, driving back again.
Now you can cut time and costs by making these changes remotely
from your office via Internet, LAN or a wired broadband connection
(fiber optics or DSL). Most buildings already have an Internet and
LAN connection – thus providing global connectivity. This is why data
security must be ensured using a VPN DSL router or dial-up router
respectively.
Benefits
• Parameters can be quickly changed by remote access
• Remote access saves driving time and costs
• Data security is ensured
Follow these steps
• Connect IP interface N 148/22 to the KNX and LAN
• Configure the VPN DSL router or dial-up router
You will need
• An IP interface N 148/22, for example
• 24-V power supply for IP interface N 148/22, e.g. Power over
Ethernet, unchoked bus voltage
• VPN DSL router or ISDN/analog dial-up router
• ETS; see knx.org for the latest version
Note:
LAN stands for Local Area Network. In LANs, data transport is orga-
nized using the IP (Internet Protocol) – the standard network protocol
on the Internet.
VPN (Virtual Private Network) lets you set up a secure subnetwork via
an open, unsecured network (Internet, wireless network) by protecting
all communication against access or being tapped into by unauthorized
third parties. This is achieved by means of „tunneling“ the data traffic
via a VPN server, which means that any connections must be authenti-
cated and that all data is also encoded.
The solution
DSL router or modem
DSL router with VPN or
ISDN/analog dial-up router
Internet (over VPN connection
or dial-up modem)
KNX device
KNX device
KNX device
IP interface
I201_15414
KNX LAN
LAN
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