Interra ITR901-002 Manuale utente

@2019 INTERRA PM190204012AEN

ITR901-002 –KNX LINE COUPLER

Product Manual

KNX Line Coupler

Product Manual

@2019 INTERRA PM190204012AEN

Information contained in this publication regarding

device applications and the like is provided only for

your convenience and may be superseded

versions by updates. It is your responsibility to

ensure that your application meets with your

specifications.

INTERRA MAKES NO REPRESENTATIONS OR

WARRANTIES OF ANY KIND WHETHER

EXPRESS OR IMPLIED, WRITTEN OR ORAL,

STATUTORY OR NONSTATUTORY, RELATED

TO THE INFORMATION INCLUDING BUT NOT

LIMITED TO ITS CONDITION, QUALITY,

PERFORMANCE, MERCHANTABILITY OR

FITNESS FOR PURPOSE.

Interra disclaims disclaims all liability arising from

this information and its use. Use of Interra devices

in life support and / or safety applications is entirely

at the buyer’s risk, and the buyer agrees to defend,

indemnify and hold harmless Interra from any and

all damages, claims, suits, or expenses resulting

from such use. No licenses are conveyed, implicitly

or otherwise under any Interra intellectual rights.

Trademarks

The Interra name and logo and the Interra ITR901–

002 KNX Line Coupler are registered trademarks of

Interra Technology in Turkey and other countries.

All other trademarks mentioned herein are property

of the Interra Technology.

Reserved.

Printed on recycled paper.

TS EN ISO 9001:2008

KNX Line Coupler

Product Manual

@2019 INTERRA PM190204012AEN

TO OUR CUSTOMERS

One of our most important aims is to provide you with the best documentation possible to use

successfully your Interra products. Focusing of this, we will keep on improving our documentation to

better suit your needs. Our publications will be updated as new volumes as soon as changes are

introduced.

If you have any questions or comments regarding this publication, do not hesitate to contact us:

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Most Current Product Manual

To obtain the most up-to-date version of this product manual, please visit our Web site at:

http://www.interra.com.tr

You can determine the version of an Interra document examining its literature number found on the

bottom right corner of any page.

The first two letters of the literature are the type of document. The numbers that follow are the creation

date of the document and the last letter is the version (e.g., PM181017001A is the version A of a

product manual created on the date 17/10/18.)

KNX Line Coupler 
Product Manual 
 
 

@2019 INTERRA PM190204012AEN 
CONTENTS 
1.) Front Panel ................................................................................................................................................ 6 
2.) LED Indication............................................................................................................................................ 7 
3.) Device Commissioning............................................................................................................................... 8 
4.) General Features....................................................................................................................................... 8 
1) TP Coupler Application............................................................................................................................... 9 
2) TP Repeater Application........................................................................................................................... 10 
3) KNX Network Installation ......................................................................................................................... 11 
3.1) Physical Address Topology .................................................................................................................... 11 
3.2) KNX Topology ........................................................................................................................................ 12 
4) Programming............................................................................................................................................ 13 
4.1) Programming Button............................................................................................................................. 13 
4.2) Physical Address Assignment ................................................................................................................ 13 
5) Special Functions...................................................................................................................................... 14 
5.1) Manual Function ................................................................................................................................... 14 
5.2) Restore Factory Settings........................................................................................................................ 14 
5.3) LED Status Display ................................................................................................................................. 14 
1) General..................................................................................................................................................... 15 
2) Main Line.................................................................................................................................................. 16 
3) Subline...................................................................................................................................................... 17 
1) General..................................................................................................................................................... 19 
2) Main Line.................................................................................................................................................. 19 
3) Subline...................................................................................................................................................... 20 
) TECHNICAL DRAWINGS .............................................................................................................................. 22 
 

KNX Line Coupler

Product Manual

@2019 INTERRA PM190204012AEN

1.) PRODUCT DESCRIPTION

The KNX TP Media Coupler ITR901-002 works as a KNX line/area coupler to provide a bi-directional data connection

between two KNX TP lines/areas. KNX TP main line and KNX TP subline are coupled having a galvanic isolation in between.

Using the TP Coupler application, ITR901-002 can be used as a KNX TP line coupler to connect several KNX TP lines but

also as a KNX TP area coupler to connect several TP areas or different KNX TP installation systems via a TP Backbone.

Telegram filtering is accomplished according to the installation place in the hierarchy (Physically addressed Telegrams) and

according to the built in filter tables for group communication (Group oriented Telegrams). For detailed diagnosis all

operational modes/states are shown by a duo-LED display.

Using the TP Repeater application, ITR901-002 is able to extend a KNX TP line providing unfiltered data transfer and

galvanic isolation between segments. Up to four line segments can form a single KNX TP line by connecting three ITR901-

002 line repeaters. Each line segment requires its own KNX power supply unit.

To ease commissioning and troubleshooting the Manual Function for short-time telegram filter switch-off

and special routing/repetition/confirmation settings are available.

Note: In this document, physically addressed telegrams are named Physical Telegrams, also group oriented telegrams are

named Group Telegrams.

KNX Line Coupler

Product Manual

@2019 INTERRA PM190204012AEN

1.1.) Front Panel

Fig 1: Front View

The following table shows information and descriptions of the front panel.

LED

BUTTONS / CONNECTORS

1. Bus State KNX TP (Main Line)

A. Function Button

2. Bus State KNX TP (Subline)

B. Program Button

3. Telegram Traffic KNX TP (Main Line)

C. KNX TP Main Line Connector

4. Telegram Traffic KNX TP (Subline)

D. KNX TP Subline Connector

5. Group Addres(GA) Routing (0....13)

6. Physical Address(PA) Routing

7. Programming

Table 1 : LED & Buttons Descriptions

KNX Line Coupler

Product Manual

@2019 INTERRA PM190204012AEN

1.2.) LED Indication

If ITR901-002 is used as Line Couper without physical address x.y.0, LED 6 (PA) that is showed at table 1, works not like

described here.

NUMBER

LED

COLOUR

DESCRIPTION

Bus State KNX TP

(Main Line)

Green

Main Line OK.

Red

Manual Function Active.

Bus State KNX TP

(Subline)

Green

Subline OK.

Off

Subline not connected.

Telegram Traffic KNX

(Main Line)

Blinking Green

Telegram traffic extent indicated by blinking.

Blinking Red

Transmission error.

Off

No telegram traffic.

Telegram Traffic KNX

(Subline)

Blinking Green

Telegram traffic extent indicated by blinking.

Blinking Red

Transmission error.

Off

No telegram traffic.

Group Address Routing

Green

Filter table active.

Orange

Route all.

Red

Block all.

Off

Routing of Group Telegrams is different on main

line and subline.

Physical Address

Routing

Green

Filtering active.

Orange

Route all.

Red

Block all.

Off

Routing of Physical telegrams is different on main

line and subline.

Programming

Red

Program Mode active.

Off

Program Mode not active.

KNX Line Coupler

Product Manual

@2019 INTERRA PM190204012AEN

1.3.) Device Commissioning

The default settings of the device are :

➢All telegrams are blocked due to the filter table is not defined.

➢The Manual Function switch-off time is 120 min.

➢Physical address is “15.15.0”.

➢Never connect the device to 230V.

Fig 2: Connection Scheme

1.4.) General Features

➢ITR901-002 KNX IP Router supports extended frames and long telegrams up to 240 bytes APDU length.

➢ACK sending on sent out messages is ETS configurable.

➢When there is no IACK response on the subline the Interra KNX IP Router is able to repeat messages up to three

times. Repetitions can be configured for both Physical Telegrams and Group Telegrams via ETS (to ease

troubleshooting). After an IACK response no repetition is following and the negative IACK/BUSY failure mechanism

is maintained.

➢Automatic function for switching back to run-time telegram filtering after configurable suspension period. This

avoids forgetting the reactivation of filtering.

➢For an ETS configurable time period, it is possible to switch off telegram filtering by only pressing a button on the

device front panel. Without additional ETS download filtering is suspended. This is necessary for running fast

diagnostics on site.

KNX Line Coupler

Product Manual

@2019 INTERRA PM190204012AEN

➢Temporarily suspending telegram filtering eases commissioning and debugging. Without ETS download temporary

access to other lines becomes possible.

➢In networks with high busload the internal amount of communication buffers are capable of smoothing peeks in the

communication load course.

➢ITR901-002’s ETS database entries are available for ETS4 and later.

2.) OPERATIONAL DESCRIPTION

In network installations ITR901-002 can be used as KNX TP area/line coupler or KNX TP line repeater. With its default

settings, device operates as is supposed to.

2.1) TP Coupler Application

When ITR901-002 receives telegrams (for example during commissioning) that use Physical Addresses as destination

addresses, it compares the Physical Addresses of the receiver with its own physical address and decides on that whether it

has to route the telegrams or not.

When ITR901-002 receives telegrams that use group addresses as destination addresses, it reacts in accordance with the

parameter settings. During normal operation (with default settings), ITR901-002 only routes telegrams whose group

addresses are entered in the filter table. If ITR901-002 routes a telegram and does not receive an acknowledgement, or if a

bus device discovers a transmission error, the coupler repeats telegrams up to three times (depending on the corresponding

parameter that is set by ETS). With the parameters "Repetitions if errors...“, this function can be configured separately for

each line. It is recommended to use the default parameter setting.

If not already configured as “Line Coupler”, the ETS application program “TP Coupler” has to be downloaded to the device.

Under the Information tab the configuration setting can be changed by the drop-down menu “Change Application Program”.

After changing the configuration setting the filter table entries can be added manually. Updating the application program

version can also be done here.

Fig 3: TP Coupler Application Program

KNX Line Coupler

Product Manual

@2019 INTERRA PM190204012AEN

2.2) TP Repeater Application

Any received telegram is routed to all lines irrespective of in which line it is processed. Line repeaters make no use of a filter

table. It is therefore not important whether the telegram is generated within a line or whether it is sent from an upper line to

a lower line via a coupler.

When a transmission error occurs, i.e. due to a wrong receiving Physical Address, the line repeater is able to repeat the

telegram up to three times. With the parameter "Physical: Repetition if errors …“ this function can be configured separately

for each line.

In case of routing a Group Telegram without receiving an acknowledgement, the line repeater repeats telegrams up to three

times. With the parameter "Group: Repetitions if errors...“, this function can be configured separately for each line.

If not already configured as Line/Area/BB Repeater, the ETS application program “TP repeater” has to be downloaded to

the device. Under the Information tab the configuration setting can be changed by the drop-down menu “Change Application

Program”. After changing the configuration setting the filter table entries can be added manually. Updating the application

program can also be done here.

Fig 4: TP Repeater Application Program

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