1、raising standards worldwideNO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAWBSI Standards PublicationBS ISO 16844-2:2011Road vehicles TachographsystemsPart 2: Electrical interface with recordingunitBS ISO 16844-2:2011 BRITISH STANDARDNational forewordThis British Standard is the
2、 UK implementation of ISO 16844-2:2011.The UK participation in its preparation was entrusted to TechnicalCommittee AUE/16, Electrical and electronic equipment.A list of organizations represented on this committee can beobtained on request to its secretary.This publication does not purport to include
3、 all the necessaryprovisions of a contract. Users are responsible for its correctapplication. BSI 2011ISBN 978 0 580 66587 5ICS 43.040.10Compliance with a British Standard cannot confer immunity fromlegal obligations.This British Standard was published under the authority of theStandards Policy and
4、Strategy Committee on 31 March 2011.Amendments issued since publicationDate Text affectedBS ISO 16844-2:2011Reference numberISO 16844-2:2011(E)ISO 2011INTERNATIONAL STANDARD ISO16844-2Second edition2011-03-01Road vehicles Tachograph systems Part 2: Electrical interface with recording unit Vhicules r
5、outiers Systmes tachygraphes Partie 2: Interface lectrique avec unit denregistrement BS ISO 16844-2:2011ISO 16844-2:2011(E) PDF disclaimer This PDF file may contain embedded typefaces. In accordance with Adobes licensing policy, this file may be printed or viewed but shall not be edited unless the t
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10、Web www.iso.org Published in Switzerland ii ISO 2011 All rights reservedBS ISO 16844-2:2011ISO 16844-2:2011(E) ISO 2011 All rights reserved iiiForeword ISO (the International Organization for Standardization) is a worldwide federation of national standards bodies (ISO member bodies). The work of pre
11、paring 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
12、 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
13、 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
14、 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 16844-2 was prepared by Technical Committee ISO/TC 22, Road vehicles, Subcommittee SC 3, Electrical and el
15、ectronic equipment. This second edition cancels and replaces the first edition (ISO 16844-2:2004), which has been technically revised. ISO 16844 consists of the following parts, under the general title Road vehicles Tachograph systems: Part 1: Electrical connector Part 2: Electrical interface with r
16、ecording unit Part 3: Motion sensor interface Part 4: CAN interface Part 5: Secured CAN interface Part 6: Diagnostics Part 7: Parameters BS ISO 16844-2:2011ISO 16844-2:2011(E) iv ISO 2011 All rights reservedIntroduction This part of ISO 16844 supports and facilitates the communication between electr
17、onic units and a tachograph. The tachograph is based upon European Council Regulation (EC) No. 561/2006 and (EEC) No. 3821/85 as last amended. Its purpose is to ensure compatibility of tachographs from various tachograph manufacturers. The basis of the digital tachograph concept is a Recording Unit
18、(RU) that stores data related to the activities of the drivers of the vehicle on which it is installed. When the RU is in normal operation status, the data stored in its memory are made accessible to various entities such as drivers, authorities, workshops and transport companies in a variety of way
19、s: they may be displayed on a screen, printed by a printing device or downloaded to an external device. Access to stored data is controlled by a smart card inserted in the tachograph. In order to prevent manipulation of the tachograph system, the speed signal sender (motion sensor) is provided with
20、an encrypted data link. A typical tachograph system is shown in Figure 1. Key 1 positive supply 3 speed signal, real time 2 battery minus 4 data signal in/out Figure 1 Typical tachograph system BS ISO 16844-2:2011INTERNATIONAL STANDARD ISO 16844-2:2011(E) ISO 2011 All rights reserved 1Road vehicles
21、Tachograph systems Part 2: Electrical interface with recording unit 1 Scope This part of ISO 16844 specifies the electrical connection between the recording unit, and the vehicle network and the motion sensor, in tachograph systems used in road vehicles. 2 Normative references The following referenc
22、ed documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. ISO 16844-1, Road vehicles Tachograph systems Part 1: Electrical connec
23、tor ISO 16844-4, Road vehicles Tachograph systems Part 4: CAN interface 3 Requirements 3.1 Connector The connector used for the recording unit shall be in accordance with ISO 16844-1. 3.2 Electrical connection 3.2.1 Standard connector Module A The electrical requirements of module A of the standard
24、connector, used for power supply and CAN bus connection, shall be in accordance with Table 1. BS ISO 16844-2:2011ISO 16844-2:2011(E) 2 ISO 2011 All rights reservedTable 1 Electrical requirements Standard connector Module A Electrical requirementaConnector contact no. and function Parameter Minimum T
25、ypical Maximum Remarks A1 Permanent power Voltage and nominal fuse link current 20 10,8 V 32 16 V 5 A Referred to pin A5 A2 Illumination Current 100 mA A3 Ignition Voltage and nominal fuse link current 20 10,8 V 32 16 V 5 A Referred to pin A6 A4 CAN1_H Powered by ignition b A5 Battery minus A6 Groun
26、d, GND A7 CAN1_GND b A8 CAN1_L Powered by ignition b aValues between square brackets refer to networks of 12 V nominal supply voltage. bElectrical requirements shall be according to ISO 16844-4. 3.2.2 Standard connector Module B 3.2.2.1 Electrical requirements The electrical requirements of module B
27、 of the standard connector, used for tachograph speed transmitter connection, shall be in accordance with Table 2. 3.2.2.2 Speed pulse output and distance signal 4 pulse/m Block diagram The block diagram of the speed pulse output and distance signal 4 pulse/m shall be according to Figure 2. 3.2.2.3
28、Speed pulse output Timing diagram The timing diagram of speed pulse output (connector contact B7) versus the motion sensor speed signal (connector contact B3) shall be according to Figure 3. BS ISO 16844-2:2011ISO 16844-2:2011(E) ISO 2011 All rights reserved 3Table 2 Electrical requirements Standard
29、 connector Module B Electrical requirement Connector contact no. and function Parameter Minimum Maximum Remarks B1 Positive supplyaVoltage 6,5 V 9 V B2 Battery minusaUlow1,0 V I = 250 A B3 Speed signal, real timeaUhigh3,8 V I = 150 A Ulow(input) 1,2 V I = 1 mA Uhigh(input) 5,2 V I = 0,5 mA Ulow(outp
30、ut) 1,0 V I = 1 mA Uhigh(output) 5,4 V I = 20 A B4 Data signalaTransmission speed 1 164 bit/s 1 236 bit/s B5 Not allocated B6 Speed pulse outputb c Ulow1,5 V I = 1 mA Uhigh5,5 V I = 1 mA Frequency (1/T) 1,6 kHz Pulse duration (t) 0,64 ms 4 ms Pulse duration 1 % Accuracy B7 Speed pulse outputbsee 3.2
31、.2.2 Tachograph constant (k) 4 000 pulse/km 25 000 pulse/km Ulow1,5 V I = 1 mA Uhigh5,5 V I = 1 mA Frequency 244 Hz v = 220 km/h B8 Distance signal, 4 pulse/m (optional)bsee 3.2.2.3 Pulse duration t1 1,6 ms aPermanently powered: battery minus. See ISO 16844-3. bPowered by ignition: Ground. cThe valu
32、es can be different to B7. BS ISO 16844-2:2011ISO 16844-2:2011(E) 4 ISO 2011 All rights reservedFigure 2 Block diagram a) Motion sensor speed signal (contact B3) b) Speed pulse output (contact B7) aMax. 40 s delay, 10 s jitter. Figure 3 Speed pulse output Equations (1) to (4) describe the relationsh
33、ip between speed (v), tachograph constant (k) and speed pulse output (T and t). motion sensor1Tf= (1) where T is the complete speed pulse duration in seconds (s); f is the speed pulse frequency in hertz (Hz). 16 000kt = (2) where t is the positive speed pulse duration in milliseconds (ms); k is the
34、tachograph constant in pulses per kilometre (pulse/km). 3 600kvT=(3) where v is the vehicle speed above ground in kilometres per hour (km/h); k is the tachograph constant in pulses per kilometre (pulse/km); T is the complete speed pulse duration in seconds (s). BS ISO 16844-2:2011ISO 16844-2:2011(E)
35、 ISO 2011 All rights reserved 5()3 600225 km/h16tvtT T=(4) where v is the vehicle speed above ground in kilometres per hour (km/h); T is the complete speed pulse duration in seconds (s); t is the positive speed pulse duration in milliseconds (ms). 3.2.2.4 Distance signal 4 pulse/m Timing diagram The
36、 timing diagram of the distance signal 4 pulse/m (connector contact B8) shall be according to the example in Figure 4, where each positive edge represents a distance of 250 mm, as averaged over 1 km. Figure 4 Distance signal 3.2.3 Module C (optional) The optional module C of the standard connector s
37、hall be used for engine revolution sensor connection and the second CAN interface (CAN2). The connector connections shall be in accordance with ISO 16844-1. 3.2.4 Module D (optional) The optional module D of the standard connector, used for optional functions (and recommended for connector pinning w
38、hen used), shall be in accordance with Table 3. All functions of this module shall be powered over ignition switch. Table 3 Remarks on the optional module D of the standard connector Connector contact no. and function Remarks D1 Status input 1 D2 Status input 2 D3 Not allocated D4 General tachograph
39、 warning output Open collector 10 mA, active pull down D5 Not allocated D6 Speed pulse output for instrument D7 Data communication I/O Speedometer interface or K-Line D8 Not allocated BS ISO 16844-2:2011ISO 16844-2:2011(E) 6 ISO 2011 All rights reservedBibliography 1 ISO 16844-3, Road vehicles Tacho
40、graph systems Part 3: Motion sensor interface 2 Regulation (EC) No. 561/2006 of the European Parliament and the Council of 15 March 2006 on the harmonisation of certain social legislation relating to the road transport and amending Council Regulations (EEC) No. 3821/85 and (EC) No. 2135/98 and repea
41、ling Council Regulation (EEC) No. 3820/85 3 Council Regulation (EEC) No. 3821/85 of 20 December 1985 on recording equipment in road transport BS ISO 16844-2:2011BS ISO 16844-2:2011ISO 16844-2:2011(E) ICS 43.040.10 Price based on 6 pages ISO 2011 All rights reserved This page deliberately left blankB
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