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Customer tele-information on French electric meter Linky

The Linky electric meter, intended to be installed in all French households is equipped a digital tele-information output, commonly called TIC (Télé-Information Client / customer tele-informaiton).

Linky electric meter

This gives the customer the opportunity to get in real time their electrical consumption. It continuously broadcasts the parameters updated by the counter. The output is of the classical asynchronous type and the information is transmitted in series on the line. The TIC connector is in the lower corner meter right. Note that this output is purely informative and the information transmitted have no contractual value.

Customer tele-information connector of Linky electric meter

Power supply

The TIC output has a power supply (at 50 kHz) which supplies power to the receiver. The TIC power supply circuit is on pins I1 and A. This pins can be used by customers to power a tele-information receiver attached to the meter (a radio module for example).

Pinout of the power suply of the Linky electric meter

No load specification

Without load on power supply (no current consumed), the voltage across the terminals of power is about 13 Vrms max.

Genereal aspect of the TIC power supply of the Linky electric meter

Specification with load

To respect the characteristics below, the Linky are tested on purely resistive loads between 225 and 335 ohms; the aim being that the guaranteed power is always greater than 130 mW.

Specification Value
Power provided min. 130 mW
Voltage 6Vrms +/- 10% (max 12V peak)
Frequency 50kHz

The two most used converted output voltage values are 3.3V and 5V. With 130mW of minimum power supplied, the output currents are respectively about 39.4mA and 26mA.

Data transmission

Data transmision is sent on pins I1 and I2. The signals can be transmitted over a wired bus (serial link modulated on twisted pair). To have efficient operation and respect the electrical characteristics, the maximum length of the line must not exceed 500m.

Pinout for the Linky electric meter data transmission

Customer tele-information can be configured in two modes:

The information signals are of the “amplitude modulation” type on a carrier at 50 kHz as illustrated below:

Modulated Linky data transmission signal recorded

Historic mode specifications

Specification Value
Transmission Binary with a carrier modulated at 50kHz
Carrier frequency 50kHz
Unidirectional From meter to receiver
Transmissionr ate 1200 bauds
Time for one bit 833 us per bit
Coding logic Negative : if the carrier is present, the bit is 0, otherwise 1

Standard mode specification

Specification Value
Transmission Binary with a carrier modulated at 50kHz
Carrier frequency 50kHz
Unidirectional From meter to receiver
Transmissionr ate 9600 bauds
Time for one bit 104 us per bit
Coding logic Negative : if the carrier is present, the bit is 0, otherwise 1

Transmission

Physical layer

Les caractères sont émis sur 10 bits dont la composition est la suivante :

Détail de la transmission d'un octet sur la TIC du Linky

Bits are transmitted from LSB (Least Significant bit) to MSB (Most Significant bit).

Data link layer

Frames are transmitted continuously. These are composed an STX character (0x02) indicating the start of the frame, followed by the frame content composed of several characters and a final ETX character (0x03) indicating the end of the frame.

Linky TIC frame detailed

Historic mode

In each line there is information sent by the meter. Each piece of information is perfectly delimited in order to be able to parse frames easily. This begins with a Line Feed which indicates the beginning , a label, a space, the data field, a new space, the checksum and a carriage return which indicates the end of this line.

Format of a group of informationin historic mode

Standard mode

Transmitted data is preceded by a label allowing to identify it (for example: ADCO is the label for the "Meter address"). Information groups can be made up of 7 to 9 parts (depending of the timestamp), a start character (line feed), a label, several separators (horizontal tab), the data, a checksum, and a closing character (carriage return).

Format of a group of information in standard mode

Format of a group of informaiton in standard mode without timstamp

Example in historic mode: ADCO 021875164764

Data example in historic mode

Application layer

Le détail de la couche application est très bien détaillée dans le chapitre 6 de la documentation fournie par Enedis.

Sources et références


Last update : 02/20/2020