1、_ 6$(7HFKQLFDO6WDQGDUGV%RDUG5XOHVSURYLGHWKDW7KLVUHSRUWLVSXEOLVKHGE6$(WRDGYDQFHWKHVWDWHRIWHFKQLFDODQGHQJLneering sciences. The use of this report is entirely voluntary, and its applicability and suitability for any particular use, including any patent infringement arising tKHUHIURPLVWKHVROHUHVSRQVLEL
2、OLWRIWKHXVHU SAE reviews each technical report at least every five years at which time it may be revised, reaffirmed, stabilized, or cancelled. SAE invites your written comments and suggestions. Copyright 2013 SAE International All rights reserved. No part of this publication may be reproduced, stor
3、ed in a retrieval system or transmitted, in any form or by any means, electronic, mechanical, photocopying, recording, or otherwise, without the prior written permission of SAE. TO PLACE A DOCUMENT ORDER: Tel: 877-606-7323 (inside USA and Canada) Tel: +1 724-776-4970 (outside USA) Fax: 724-776-0790
4、Email: CustomerServicesae.org SAE WEB ADDRESS: http:/www.sae.org SAE values your input. To provide feedback on this Technical Report, please visit http:/www.sae.org/technical/standards/J2247_201309 SURFACE VEHICLE RECOMMENDED PRACTICE J2247 SEP2013 Issued 1995-07 Revised 2013-09 Superseding J2247 DE
5、C2007 Truck Tractor Power Output for Trailer ABS RATIONALE The SAE J2247 Document was updated to remove reference to the ISO3731 document which has since been included in the SAEJ560 document. Also additional clarification has been added to Section 5, the test procedure, and recommendations to deter
6、mine the source of voltage drop added in Section 5.7.1. 1. SCOPE This SAE Recommended Practice identifies the minimum truck tractor electrical power output of the stop lamp and ABS (antilock brake system) circuits measured at the primary SAE J560 tractor trailer interface connector(s). 2. REFERENCES
7、 2.1 Applicable Documents The following publications form a part of this specification to the extent specified herein. Unless otherwise indicated, the latest version of SAE publications shall apply. 2.1.1 SAE Publications Available from SAE International, 400 Commonwealth Drive, Warrendale, PA 15096
8、-0001, Tel: 877-606-7323 (inside USA and Canada) or 724-776-4970 (outside USA), www.sae.org. SAE J560 Primary and Auxiliary Seven Conductor Electrical Connector for Truck-Trailer Jumper Cable SAE J2222 Coiled Electrical Cable - Truck and Bus SAE J2394 Seven Conductor Cable for ABS Power - Truck and
9、Bus SAE J2247 Revised SEP2013 Page 2 of 4 2.1.2 FMVSS Publications Available from the Superintendent of Documents, U.S. Government Printing Office, Mail Stop: SSOP, Washington, DC 20402-9320. Federal MotorVehicle Safety Standard (FMVSS) of the US Code of Federal Regulations Title 49 Part 571.108 Lam
10、ps, Reflective Devises, and Associated Equipment Federal MotorVehicle Safety Standard (FMVSS) of the US Code of Federal Regulations - Title 49 Part 121 Air Brake Systems 3. DEFINITIONS 3.1 PRIMARY CONNECTOR As used in this standard refers to the receptacle and cable plug that provides power to safet
11、y lighting and the ABS as required by FMVSS 108 and FMVSS 121. (Referenced from SAE J560) 4. TECHNICAL REQUIREMENTS The minimum DC voltage measured on the stop lamp and ABS circuits of the SAE J560 Primary Connector when tested in accordance with Section 5 of this document shall be 12.5 V for new ve
12、hicles. Note that compliance with the minimum voltage requirements may not be adequate for some multiple trailer ABS applications. 5. TEST PROCEDURE 5.1 Check tractor battery condition. Tractor batteries are to be in good condition and fully charged. 5.2 Start and run engine at 1000 rpm 100 rpm. Mea
13、sure voltage at battery. Battery voltage must measure 13.5 volts or above. 5.3 Connect a 10 A load device to the stop lamp circuit and a 10 A load to the ABS power circuit. The loads are attached to the SAE J560 primary tractor/trailer interface connector at, the trailer interface end, and grounded
14、through the ground circuit of the SAE J560 primary connector. a. Stop Lamp Circuit - Terminal 4 - SAE J560 10 GA/5 mm2Red SAE J2394 and SAE J2222 b. Continuous ABS Power - Terminal 7 - SAE J560 10 GA/5 mm2Blue - SAE J2394 and SAE J2222 c. Ground Return to Towing Vehicle - Terminal 1 - SAE J560 8 GA/
15、8 mm2White - SAE J2394 and SAE J2222 5.4 Turn RQQRUPDOHOHFWULFDOORDGV - such as heaters, AC, lights, radios, etc. 5.5 Check load device output after 5 min and adjust if necessary to ensure 10 A per circuit draw and confirm that the battery terminal voltage is 13.5 VDC minimum. CAUTION: The electrica
16、l load devices may be HOT and cause injury if touched or ignite flammable material. 5.6 Measure and record the voltage on the stop lamp and ABS circuits on the trailer load side of the SAE J560 Primary Connector as near as practical to the connector terminals. The minimum voltage should be 12.5 VDC
17、at 20 C 10 C between each circuit to the ground terminal. See Figure 1 - If not, proceed to 5.7. SAE J2247 Revised SEP2013 Page 3 of 4 FIGURE 1 TRACTOR POWER TEST CIRCUITS NOTE: Both the stop lamp and ABS power circuits are loaded simultaneously at the time of measurement. 5.7 To meet the 12.5 VDC m
18、inimum voltage requirement may require an upgrade in the alternator rated output, circuit design revisions to reduce the voltage drop, or a combination of these options. Note for the given test conditions, the combination of all the electrical loads including the test loads must be below 75% of the
19、alternator rated output 5.7.1 If the minimum voltage requirement is not met it may be helpful to determine if the excessive voltage drop occurred in the circuits within the tractor or within the seven conductor cord and connections. The total voltage drop can be calculated by subtracting the voltage
20、 measured at the end of the seven conductor cord from the voltage measured at the battery. The above test procedure can be performed again at the connection on the tractor without the seven conductor cord to determine the voltage drop in just the tractor circuits. The difference between the total vo
21、ltage drop and the voltage drop in just the tractor circuits is the voltage drop in the seven conductor cord. It may also be helpful to determine if the excessive voltage drop occurred in the high side of the circuit (between battery positive and the load) or in the ground path (between battery nega
22、tive and the load). These measurements can be made directly by utilizing a multimeter with long leads. The total voltage drop should be split approximately equally between the high side of the circuit and the ground side of the circuit. Note that twice as much current is flowing in the ground side o
23、f the circuit so the ground side must have about half the resistance of the high side. To comply with the recommended tractor-trailer interface power requirements, modify the electrical system (tractor circuits and/or seven conductor circuits) as required and repeat the test procedure to verify perf
24、ormance. SAE J2247 Revised SEP2013 Page 4 of 4 6. ADDITIONAL RECOMMENDATIONS 6.1 If the vehicle is not equipped with a trailer cable and connector, install a vehicle manufacturer approved assembly of at least 4267 mm for the test. Cables and connectors in compliance with the SAE J2394, SAE J2222 and
25、 SAE J560, and other applicable standards are recommended. 6.2 This measurement test procedure may be used for new and in-service vehicles. 6.3 Use instruments of known accuracy for all measurements. 6.4 Vehicles with trailer connections that run to the rear of the chassis frame (Full trailer connec
26、tions) are not included with this test procedure. 7. NOTES 7.1 Marginal Indicia A change bar (l) located in the left margin is for the convenience of the user in locating areas where technical revisions, not editorial changes, have been made to the previous issue of this document. An (R) symbol to t
27、he left of the document title indicates a complete revision of the document, including technical revisions. Change bars and (R) are not used in original publications, nor in documents that contain editorial changes only. PREPARED BY THE SAE TRUCK AND BUS ELECTRICAL SYSTEMS COMMITTEE OF THE SAE TRUCK AND BUS ELECTRICAL/ELECTRONIC STEERING COMMITTEE
