Weinzierl KNX IP Interface 731 Specification sheet

©2016 WEINZIERL ENGINEERING GmbH Page 1/4
Operation and installation manual
KNX IP Interface 731
(Art. # 5242)
Compact bus powered Interface between LAN/Ethernet and KNX Bus
KNX IP Interface 731
Application
The KNX IP Interface 731 serves as a universal interface for PC
or Laptop to the KNX bus. The KNX bus can be accessed from
any point on the LAN. The KNX IP Interface 731 can be used as
a programming interface for ETS® from ETS 3.0f. For access via
KNXnet/IP Tunneling max. 5 simultaneous connections are
possible.
The IP address can be obtained by a DHCP server or by manual
configuration (ETS) respectively. Power is supplied via the KNX
bus.
Installation and Connection
The KNX IP Interface 731 is designed for installation on a DIN
rail with a width of 1 unit (18mm). It features the following con-
trols and displays:
The KNX IP Interface 731 is powered by the KNX bus. An exter-
nal power supply is not necessary.
The device is not working without KNX bus power.
KNX programming mode
The KNX programming mode is activated/deactivated either by
pressing the flushed KNX programming button ❸ or by simulta-
neously pressing the buttons ❼ and ❽.
Status display
The KNX LED ❹ lights up green if the device is successfully
powered by the KNX bus. The LED indicates telegrams on the
KNX bus by flickering.
Communication failures (e.g. repetitions of telegram or telegram
fragments) are indicated by a short change of the LED color to
red.
The IP LED ❻lights up when an Ethernet link is active. This
LED is green if the device has valid IP settings (IP address, Sub
net and Gateway). With invalid or nonexistent IP settings the
LED is red. This is also the case if e.g. the device has not yet
received the IP settings by a DHCP server. The LED indicates IP
telegrams by flickering.
The Mode LED ❺can visualize the status of each KNXnet/IP
tunneling connection. With the buttons Conn Up/Dn ❼❽you
can chose each single connection. Conn Up ❼counts the
connection numbers up and Conn Dn ❽down. The actually
selected connection number is indicated by flashing (1x…5x) of
the Mode LED ❺. An available KNXnet/IP Tunneling connec-
tion is indicated by a green LED and a used tunneling connec-
tion is indicated by an orange LED.
Via the Escape function (Esc) this indication can be ended by
simultaneously pressing the buttons Conn Up/Dn ❼❽.
If neither programming mode nor manual operation are active
the Mode LED ❺ can visualize configuration errors.
Overview of the different indications of the Mode LED:
Factory default settings
Factory default configuration:
Individual device address: 15.15.255
Number of configured KNXnet/IP tunneling con.: 1
Individual address of tunneling con.: 15.15.250
IP address assignment: DHCP
Reset to factory device settings
It is possible to reset the device to its factory settings:
Separate the KNX Bus connector ❶ from device
Press the KNX programming button ❸ and keep it
pressed down
Reconnect the KNX Bus connector ❶ of device
Keep the KNX programming button ❸pressed for at
least another 6 seconds
LED Status
Meaning
LED lights green
Device is working in standard operation mode.
LED lights red
Programming mode is active
LED flashes green 1x..5x
Programming mode is not active.
Manual operation is active.
The selected tunnel (1-5) is not used and free
LED flashes orange 1x…5x
Programming mode is not active.
Manual operation is active.
The selected tunnel (1-5) is used
LED flashes red
Programming mode is not active.
Manual operation is not active.
The device is not properly loaded e.g.
after an interrupted download.
EN
❶ KNX Bus Connector
❷ LED for Programming Mode (red)
❸ Button for Programming Mode
❹ LED KNX (red/green)
❺ LED Mode (red/green)
❻ LED IP (red/green)
❼ Button Connection up
❽ Button Connection down
❾ Ethernet/LAN Connector

©2016 WEINZIERL ENGINEERING GmbH Page 2/4
A short flashing of all LEDs (❷❹❺❻) visualizes the
successful reset of the device to factory default settings.
Interface settings within ETS
Within the ETS, KNX interfaces can be selected and set up via
the ETS menu "Bus Interfaces".
The ETS can access configured KNX IP Interfaces even without
a database entry. If the setup of the KNX IP Interface does not
comply with the conditions of the KNX installation it must be
configured via an ETS project. See the ETS database section for
more information.
As factory default the assignment of the IP address is set to
“automatically via DHCP” and thus no further settings are neces-
sary. To use this feature a DHCP server on the LAN must exist
(e.g. many DSL routers have an integrated DHCP server).
After connecting the KNX IP Interface to the LAN and the KNX
bus it should automatically appear in the ETS within the menu
"Bus" under "Discovered interfaces".
By clicking on the discovered interface it is selected as the cur-
rent interface. On the right side of the ETS window all specific
information and options of the connection appear.
The indicated device name and the "Host Individual Address"
(individual address of the device) can be changed within your
ETS project then.
Like all programmable KNX devices the KNX IP Interface 731
has an individual address which can be used to access the
device. This is used, for example, of the ETS when downloading
to the KNX IP Interface via the bus.
For the interface function the device contains additional individu-
al addresses that can be set in the ETS (ETS 4.2 or higher).
When a client (e.g. ETS) sends via the KNX IP Interface tele-
grams to the bus, they contain a sender address as one from the
additional addresses. Each address is associated with a connec-
tion. Thus response telegrams can be clearly transmitted to the
respective client.
The additional individual addresses must be selected from the
address range of the bus line in which the interface is installed
and may not be used by another device.
Example:
Device address 1.1.10 (address within ETS topology)
Connection 1 1.1.250 (1. additional address)
Connection 2 1.1.251 (2. additional address)
Connection 3 1.1.252 (3. additional address)
Connection 4 1.1.253 (4. additional address)
Connection 5 1.1.254 (5. additional address)
Section “Individual Address” enables you to change the individu-
al KNX address of the currently used KNXnet/IP Tunneling
connection. To check if the address you want to assign is unique
within your KNX installation you can click the button “Address
free?”
The individual KNX device address and the individual addresses
for additional tunneling connections can be changed within the
ETS project after the device has been added to the project.
ETS database
The ETS database (for ETS 4.2 ETS and 5) can be downloaded
from the product website of the KNX IP Interface 731
(www.weinzierl.de). For existing installations a database for ETS
3 is also available.
When using the ETS® product database for ETS 4 / 5 some
settings are displayed in addition to the parameter dialog of the
Properties dialog (on the right side of the ETS window). So the
IP settings can be done here. In the ETS 4 also the additional
individual addresses will appear. In the ETS 5 those addresses
appear in the topology view.
Each individual KNX address can be changed by clicking on the
list entry and typing in the desired address into the “Individual
Address”text-field. If the text-field frame switches to color red
after entering the address, the address is already taken within
your ETS project.
Make sure that none of the addresses above is already
in use within your KNX installation.
If the physical KNX addresses of the tunneling connec-
tions have been assigned via the ETS project, a manual
address setting on the device is not allowed.
By clicking on the KNX IP Interface 731 device entry within your
ETS projects topology view, an information column ‘Properties’
will appear on the right side of the ETS window. Within the ‘Set-
tings’ overview, you can change the name of the device.
Within the “IP”overview the IP network specific options of the
KNX IP Interface 731 can be changed.
By changing "obtain an IP address automatically (via DHCP)" to
“Use a static IP address" (static IP address) the IP address,
subnet mask, and default gateway can be set freely.
All changes in the properties menu become effective on-
ly after a successful application download.

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IP address
Here the IP address of the KNX IP Interface 731 can be entered.
This is used to address the device via the IP network (LAN). The
IP addressing should be coordinated with the administrator of
the network.
Subnet mask
Enter the subnet mask here. The device uses the values entered
in this mask to determine whether there is a communication
partner in the local network. If there is no partner in the local
network, the device will not send the telegrams directly to the
partner but to the gateway that routes the telegram.
Default gateway
Enter the IP address of the gateway here, e.g. the DSL router of
the installation.
Example of assigning IP addresses:
A PC is used to access the KNX IP Interface 731:
IP address of the PC: 192.168.1.30
Subnet of the PC: 255.255.255.0
The KNX IP Interface 731 is located in the same local LAN, i.e. it
uses the same subnet. The subnet constrains the IP addresses
that can be assigned. In this example, the IP address of the IP
interface must be 192.168.1.xx, where xx can be a number from
1 to 254 (with the exception of 30, which is already in use). It
must be ensured that no numbers are assigned twice.
IP address of the IP Interface: 192.168.1.31
Subnet of the IP Interface: 255.255.255.0
Remote access
Remote access via the Internet is possible via the KNX IP Inter-
face 731. More details can be found in the document "Remote
access with the ETS" at www.weinzierl.de
ETS parameter dialogue
The following parameters can be set using the ETS.
General:
Programming mode on device front
The programming mode on the device front can be activated by
simultaneously pressing the buttons ❼ and ❽. The flushed
programming button ❸is always active and is not influenced by
this parameter.
Manual operation on the device
The manual operation of the KNX IP Interface 731 only contains
the status display. This parameter sets the duration of the manu-
al mode. Upon completion the normal display mode is restored.
Programming
The KNX IP Interface 731 can be programmed in different ways
via the ETS:
Via the KNX bus
The device only needs to be connected to the KNX bus. The
ETS requires an additional interface (for example, USB) to have
access to the bus. Via this way both the individual address and
the entire application including IP configuration can be pro-
grammed. Programming via the bus is recommended if no IP
connection can be established.
Via KNXnet/IP Tunneling
No additional interface is required. Programming via KNXnet/IP
Tunneling is possible if the device already has a valid IP configu-
ration (e.g. via DHCP). In this case the device is displayed in the
interface configuration of the ETS and must be selected. The
download is executed via the ETS project as with many other
devices.
Setting with ETS 3
When using the ETS 3 (Version 3.0f) the setting of the device’s
name and the setting of the IP configuration is done via the ETS
parameter dialogue.
The KNX IP Interface 731 can be selected in the Connection
Manager as a programming interface. Select “Communication”
within the menu item "Tools - Options":
After clicking the button “Configure Interfaces” the ETS Connec-
tion Manager opens. You have to create a new connection type
EIBnet/IP. The ETS begins with the automatic search of all
KNXnet/IP devices. All found devices are displayed. Select the
required device.

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The KNX IP Interface 731 supports up to 5 simultaneous con-
nections. For each connection a separate individual address is
used.
The first additional individual address is assigned by the ETS. By
clicking on the 'Settings' at the selected connection "Local Set-
tings" this dialogue box with a corresponding input field appears:
The further additional addresses can be assigned directly on the
device. This is done by pressing the programming button ❸at
least one second. Then, the programming LED flashes ❷and
the addresses are assigned as follows:
Connection 2 gets the next higher address than connection 1,
connection 3 gets the next higher address than connection 2,
etc.
Example:
Device address 1.1.255 (address within ETS topology)
Connection 1 1.1.250 (address within local settings)
Connection 2 1.1.251 (assigned by programming button)
Connection 3 1.1.252 (assigned by programming button)
Connection 4 1.1.253 (assigned by programming button)
Connection 5 1.1.254 (assigned by programming button)
The additional individual addresses have to be valid within the
sub line of the KNX IP Interface and not be used by another
device. By factory default only the additional individual address
of the first connection is active (which is preassigned to
15.15.250). To use more connections simultaneously, additional
address assignment must be performed as described above.
WARNING
The device may be built into distribution
boards (230/400V).
The device must be mounted and commis-
sioned by an authorized electrician.
The prevailing safety rules must be heeded.
The device must not be opened.
For planning and construction of electric in-
stallations, the relevant guidelines, regulations
and standards of the respective country are to
be considered.
Weinzierl Engineering GmbH
D-84508 Burgkirchen / Alz
Germany
http://www.weinzierl.de
[e-mail]
2016/09/21