Hager General Catalogue

6.20

General Catalogue • Technical • tebis.KNX

Tebis 868 MHz Radio

Combined system : Wire + Radio

The combined system needs to put in place a TR131A media coupler

to transmit the messages of wire products to the radio system and

vice versa.

For systems which contain both wire and radio products, the

information given above for topics 1 and 2 remain valid. But you

must take into account the following limitations :

• Maximum of 63 products of 250 possible radio systems

can communicate with TP wire products.

• Maximum 50 links can be established from the wire part to the

radio part.

• 1024 channels are available and distributed in 512 channels of

inputs and 512 channels of outputs.

Example :

6 output products = 6 channels

4 input products = 4 channels

2 input radio products = 2 channels

Topology 3 :

Mixed Tebis system containing both twisted pair and radio

products

Radio system

The TR radio system (to KNX standard) exists in input products,

output products and products with combined input/output. They

communicate between themselves by using the 868 MHz radio

frequency. The products are classified into 2 categories :

• The unidirectional input products : they are only emitters and have

only information sent.

• The bidirectional products : they are both emitters and receivers

and can thus send and receive information.

These latter ones can also be configured as radio repeaters by

TX100GB to increase globally the reliability of the transmission.

Supply of radio system is done, in the following way :

• By 230V mains

• By a battery cell

In an installation containing only radio system, the configuration is

done only with TX100GB configuration tool; the media coupler is not

used.

The products with combined input/output are pre-programmed; for

example for a 2 input products and 1 output or control of roller

shutters, the basic functions as for example up/down are

preregistered. Only modification of functions, as for example to carry

a centralized control, need the use of TX100GB.

Radio range

(indicative data) :

• in open field : 100m

• Inside a building : up to 30m

A pure radio system can contain

up to 250 TR products.

The MHz 868 : a dedicated frequency

The frequency used is 868 MHz. This frequency is harmonized at the

European level. There are 2 levels emission power :

• Repeater products : 25mW maximum

• Battery cell products : 10mW maximum

As comparison, a portable telephone emits with a power of around

2000 mW.

It is to be noted that the regulator authorities have specially

attributed the band of 868 MHz to building automation and home

automation : the occupation or “duty cycle” rate is predefined and

thus avoids the saturation problems of the band. The 868 MHz is

outside ISM bands and cannot be thus saturated by permanent

emissions (headphones for example).

Topology 2 :

Tebis radio system

tebis

TR 302A

598999

6T0457c

868,3MHz

Made in France

0682

3,0 V

25 kHz

25 kHz 100 kHz 25 kHz

25 kHz 25 kHz

25/50 kHz

100 kHz

non défini

< 1% < 0,1% < 0,1% < 0,1%

< 10% < 10% 10-100 %

SRD

SRD medical EACM SRD

SRD

alarme

alarms

100

500

power

(mW)

868,0

868,6 868,7

869,2 869,3 869,4 869,65 869,7 870

frequency(MHz)

channels

use

time

applications

TR 131B

media

coupler

supp.