Road vehicles -- LED lamp characteristics for bulb compatible failure detection

This part of ISO 13207 specifies the characteristics of LED (Light Emitting Diode) lamps used as direction indicators when optionally monitored. It applies primarily to those lamps which are installed on 24V truck/trailer combinations. It will enable lamp-failure detection of LED lamps on the drawn vehicle to be compatible with that for bulbs when analysed by the towing unit.

Véhicules routiers -- Caractéristiques des lampes LED pour détection de défaut compatible avec l'ampoule

General Information

Status
Published
Publication Date
13-Feb-2012
Current Stage
6060 - International Standard published
Start Date
06-Feb-2012
Completion Date
14-Feb-2012
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ISO 13207-1:2012 - Road vehicles -- LED lamp characteristics for bulb compatible failure detection
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INTERNATIONAL ISO
STANDARD 13207-1
First edition
2012-02-15
Road vehicles — LED lamp characteristics
for bulb compatible failure detection —
Part 1:
LED lamps used as direction indicators
Véhicules routiers — Caractéristiques des lampes LED pour détection
de défaut compatible avec l’ampoule —
Partie 1: Lampes LED utilisées comme feux indicateurs de direction
Reference number
ISO 13207-1:2012(E)
ISO 2012
---------------------- Page: 1 ----------------------
ISO 13207-1:2012(E)
COPYRIGHT PROTECTED DOCUMENT
© ISO 2012

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ii © ISO 2012 – All rights reserved
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ISO 13207-1:2012(E)
Foreword

ISO (the International Organization for Standardization) is a worldwide federation of national standards bodies

(ISO member bodies). The work of preparing International Standards is normally carried out through ISO

technical committees. Each member body interested in a subject for which a technical committee has been

established has the right to be represented on that committee. International organizations, governmental and

non-governmental, in liaison with ISO, also take part in the work. ISO collaborates closely with the International

Electrotechnical Commission (IEC) on all matters of electrotechnical standardization.

International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 2.

The main task of technical committees is to prepare International Standards. Draft International Standards

adopted by the technical committees are circulated to the member bodies for voting. Publication as an

International Standard requires approval by at least 75 % of the member bodies casting a vote.

Attention is drawn to the possibility that some of the elements of this document may be the subject of patent

rights. ISO shall not be held responsible for identifying any or all such patent rights.

ISO 13207-1 was prepared by Technical Committee ISO/TC 22, Road vehicles, Subcommittee SC 3, Electrical

and electronic equipment.

ISO 13207 consists of the following parts, under the general title Road vehicles — LED lamp characteristics for

bulb compatible failure detection:
— Part 1: LED lamps used as direction indicators
© ISO 2012 – All rights reserved iii
---------------------- Page: 3 ----------------------
INTERNATIONAL STANDARD ISO 13207-1:2012(E)
Road vehicles — LED lamp characteristics for bulb compatible
failure detection —
Part 1:
LED lamps used as direction indicators
1 Scope

This part of ISO 13207 specifies the characteristics of LED (Light Emitting Diode) lamps used as direction

indicators when optionally monitored. It applies primarily to those lamps which are installed on 24V truck/trailer

combinations. It will enable lamp-failure detection of LED lamps on the drawn vehicle to be compatible with

that for bulbs when analysed by the towing unit.
2 Terminals

The connection between the towing vehicle and the towed vehicle should be either as described in ISO 1185

and ISO 3731 or as described in ISO 12098. Towing vehicles should be equipped with electronic control units

(ECUs), which drive the trailer direction indicator lamps as described in ISO 4082.

3 Functional description
3.1 Principle

Lamp-failure monitoring electronics are required for mandatory mounted direction-indicator functions. For this

purpose, the LED direction-indicator function generates a current impulse at a certain time; this current impulse

corresponds in terms of amount with the current of a conventional bulb lamp. If the LED direction indicator fails

(in relation to the legal requirement of the photometric output), this pulse is not generated. An ECU or intelligent

flasher interprets whether the LED direction indicator fails on the basis of this pulse. The result should be used

to inform the driver accordingly.
© ISO 2012 – All rights reserved 1
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ISO 13207-1:2012(E)
Key
1 first process
2 second process
3 non-failure
4 failure
5 voltage: power supply of direction indicator during two flashing processes

6 current of LED direction indicator during two flashing processes, the first with, and second without, current control

pulse added
I current
I nominal LED lamp current
I I + control pulse current
1 2
T time
T starting point of the designated pulse time frame
T end of the designated pulse time frame
T earliest start point for the control pulse
T latest end point for the control pulse

T time frame within which the designated control pulse should be detected by the monitoring circuit of the control unit

U voltage
U operational voltage
Y voltage, U, in volts; current, I, in amperes
Figure 1 — Profile diagram 1
The functional description of
...

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