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1、 Reference number ISO 16844-2:2004(E) ISO 2004 INTERNATIONAL STANDARD ISO 16844-2 First edition 2004-05-15 Road vehicles Tachograph systems Part 2: Recording unit, electrical interface Vhicules routiers Systmes tachygraphes Partie 2: Unit denregistrement, interface lectrique -,-,- ISO 16844-2:2004(E
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5、2004 All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form or by any means, electronic or mechanical, including photocopying and microfilm, without permission in writing from either ISO at the address below or ISOs member body in the c
6、ountry of the requester. ISO copyright office Case postale 56 CH-1211 Geneva 20 Tel. + 41 22 749 01 11 Fax + 41 22 749 09 47 E-mail copyrightiso.org Web www.iso.org Published in Switzerland ii ISO 2004 All rights reserved -,-,- ISO 16844-2:2004(E) ISO 2004 All rights reserved iii Foreword ISO (the I
7、nternational 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
8、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 electrotechnica
9、l 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 bod
10、ies 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
11、 or all such patent rights. ISO 16844-2 was prepared by Technical Committee ISO/TC 22, Road vehicles, Subcommittee SC 3, Electrical and electronic equipment. ISO 16844 consists of the following parts, under the general title Road vehicles Tachograph systems: Part 1: Electrical connectors Part 2: Rec
12、ording unit, electrical interface Part 3: Motion sensor interface Part 4: CAN interface Part 5: Secured CAN interface Part 6: Diagnostics Part 7: Parameters -,-,- ISO 16844-2:2004(E) iv ISO 2004 All rights reserved Introduction ISO 16844 supports and facilitates the communication between electronic
13、units and a tachograph; the tachograph being based upon Council Regulations (EEC) No. 3820/85 1 and (EEC) No. 3821/85 2 and their amendment Council Regulation (EEC) No. 2135/98 3. Its purpose is to ensure the compatibility of tachographs from various tachograph manufacturers. The basis of the digita
14、l tachograph concept is a recording unit (RU) that stores data related to the activities of the drivers of a vehicle on which it is installed. When the RU is in normal operational status, the data stored in its memory are made accessible to various entities such as drivers, authorities, workshops an
15、d transport companies in a variety of ways: 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
16、 sender (motion sensor) is provided with 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 -,-,- INTERNATIONAL STANDARD ISO 16844-2:2004(E) ISO 2004 All rig
17、hts reserved 1 Road vehicles Tachograph systems Part 2: Recording unit, electrical interface 1 Scope This part of ISO 16844 specifies the electrical connection between the recording unit, and the vehicle network and motion sensor, in tachograph systems used in road vehicles. 2 Normative references T
18、he following referenced 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
19、 1: Electrical connectors ISO 16844-3, Road Vehicles Tachograph Systems Part 3: Motion sensor interface1) ISO 16844-4, Road Vehicles Tachograph Systems Part 4: CAN interface1) 3 Requirements 3.1 Connector The connector used for the recording unit shall be in accordance with ISO 16844-1. 3.2 Electric
20、al connection 3.2.1 Standard connector Module A The electrical requirements of module A of the standard connector, used for power supply and CAN bus connection, shall be in accordance with Table 1. 1) To be published. -,-,- ISO 16844-2:2004(E) 2 ISO 2004 All rights reserved Table 1 Electrical requir
21、ements Standard connector Module A Electrical requirement a Connector contact no. and function Parameter Minimum Typical Maximum Remark 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
22、 fuse link current 20 10,8 V 32 16 V 5 A Referred to pin A6. A4 CAN_H Powered by ignition b A5 Battery minus A6 Ground, GND b A7 CAN_GND A8 CAN_L Powered by ignition b a Values between square brackets refer to networks of 12 V nominal supply voltage. b Electrical requirements shall be according to I
23、SO 16844-4. 3.2.2 Standard connector Module B 3.2.2.1 Electrical requirements The electrical requirements of module B 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 diagr
24、am The block diagram of the speed pulse output and distance signal 4 pulse/m shall be according to Figure 2. 3.2.2.3 Speed pulse output Timing diagram The timing diagram of the speed pulse output (connector Contact B7) versus the motion sensor speed signal (connector Contact B3) shall be according t
25、o Figure 3. -,-,- ISO 16844-2:2004(E) ISO 2004 All rights reserved 3 Table 2 Electrical requirements Standard connector Module B Electrical requirement Connector contact no. and function Parameter Minimum Maximum Remark B1 Positive supply a Voltage 6,5 V 9 V B2 Battery minus a Ulow 1,0 V I = 250 A B
26、3, Speed signal, real time a Uhigh 3,8 V I = 150 A Ulow (input) 1,2 V I = 1 mA Uhigh (input) 5,2 V I = 0,5 mA Ulow (output) 1,0 V I = 1 mA Uhigh (output) 5,4 V I = 20 A B4 Data signal a Transmission speed 1 164 Baud 1 236 Baud B5 Not allocated. B6 Speed pulse output b c Ulow 1,5 V Uhigh 5,5 V I = 1
27、mA Frequency (1/T) 1,6 kHz I = 1 mA Pulse duration (t) 0,64 ms 4 ms Pulse duration 1 % Accuracy B7 Speed pulse output b (see 3.2.2.2) Tachograph constant (k) 4 000 pulse/km 25 000 pulse/km Ulow 1,5 V I =1 mA Uhigh 5,5 V I = 1 mA Frequency 244 Hz v = 220 km/h B8 Distance signal 4 pulses/m (optional)
28、(see 3.2.2.3) b Pulse duration (t1) 1,6 ms a Permanently powered: battery minus. b Powered by ignition: Ground. c The values can be different to B7. Figure 2 Block diagram -,-,- ISO 16844-2:2004(E) 4 ISO 2004 All rights reserved a) Motion sensor speed signal (Contact B3) b) Speed pulse output (Conta
29、ct B7) a Max. 40 s delay 10 s jitter. Figure 3 Speed pulse output Equations 1 to 4 describe the relationship between speed (v), tachograph constant (k) and speed pulse output (T and t) mo sensor 1 T f = (1) where T is the complete speed pulse duration in seconds (s); f is the speed pulse frequency i
30、n hertz (Hz). 16 000 k t = (2) where t is the positive speed pulse duration in milliseconds (ms); k is the tachograph constant in pulses per kilometre (pulse/km). 3 600 k v t = (3) where v is the vehicle speed above ground in kilometres per hour (km/h); k is the tachograph constant in pulses per kil
31、ometre (pulse/km); T is the complete speed pulse duration in seconds (s). () 3 600 225 km/h 16 t t v TT = (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). -
32、,-,- ISO 16844-2:2004(E) ISO 2004 All rights reserved 5 3.2.2.4 Distance signal 4 pulses/m Timing diagram The 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 o
33、ver 1 km. Figure 4 Distance signal 3.2.3 Module C (optional) The optional module C of the standard connector shall be used for engine revolution sensor connection. The connector connections should be in accordance with ISO 16844-1. 3.2.4 Module D (optional) The optional module D of the standard conn
34、ector, used for optional functions (and recommended for connector pinning when 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 Remark
35、D1 Status input 1 D2 Status input 2 D3 Not allocated. D4 General Tachograph 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. -,-,- ISO 16844-2:2004(E) 6 ISO 2004 A
36、ll rights reserved Bibliography 1 Council Regulation (EEC) No. 3820/85 of 20 December 1985 on the harmonization of certain social legislation relating to road transport 2 Council Regulation (EEC) No. 3821/85 of 20 December 1985 on recording equipment in road transport 3 Council Regulation (EEC) No.
37、2135/98 of 24 September 1998 amending Regulation (EEC) No. 3821/85 on recording equipment in road transport and Directive 88/599/EEC concerning the application of Council Regulations (EEC) No. 3820/85 and (EEC) No. 3821/85 -,-,- -,-,- ISO 16844-2:2004(E) ICS 43.040.10 Price based on 6 pages ISO 2004 All rights reserved -,-,-