{
  "url": "https://openlegislation.uk/eu-regulation-2015-68/annex-XII/appendix-1",
  "json_url": "https://openlegislation.uk/eu-regulation-2015-68/annex-XII/appendix-1.json",
  "legislation": "eur/2015/68",
  "legislation_title": "Commission Delegated Regulation (EU) 2015/68 of 15 October 2014 supplementing Regulation (EU) No 167/2013 of the European Parliament and of the Council with regard to vehicle braking requirements for the approval of agricultural and forestry vehicles (Text with EEA relevance)",
  "legislation_url": "https://openlegislation.uk/eu-regulation-2015-68",
  "path": "annex/XII/appendix/1",
  "kind": "appendix",
  "number": "1",
  "heading": null,
  "text": "Compatibility between tractors and towed vehicles with respect to ISO 11992 data communications\n1.\nGeneral\n1.1.\nThe requirements of this Appendix shall only apply to tractors and towed vehicles equipped with an electric control line.\n1.2.\nThe ISO 7638 connector provides a power supply for the braking system or anti-lock braking system of the towed vehicle. In the case of vehicles equipped with an electric control line this connector also provides a data communication interface via Pins 6 and 7 as in point 2.1 of this Annex.\n1.3.\nThis Appendix lays down requirements applicable to the tractor and towed vehicle with respect to the support of messages defined within ISO 11992-2:2003 including Amd.1:2007.\n2.\nThe parameters defined within ISO 11992-2:2003 including Amd.1:2007 that are transmitted by the electric control line shall be supported as follows:\n2.1. The following functions and associated messages are those specified within this Regulation that shall be supported by the tractor or towed vehicle as appropriate:\n2.1.1. Messages transmitted from the tractor to the towed vehicle:\nFunction/Parameter\nISO 11992-2:2003Reference\nReference in this Regulation\nService/secondary brake demand value\nEBS11\nByte 3-4\nAppendix 1 to Annex II, point 3.1.3.2.\nTwo electrical circuits brake demand value\nEBS12\nByte 3 Bit 1-2\nAnnex XII, point 3.1.\nPneumatic control line\nEBS12\nByte 3 Bit 5-6\nAnnex XII, point 3.1.\n2.1.2. Messages transmitted from the towed vehicle to the tractor:\nFunction/Parameter\nISO 11992-2:2003Reference\nReference in this Regulation\nVehicle electrical supply sufficient/insufficient\nEBS22 Byte 2\nBit 1-2\nAnnex XII, point 5.2.3.\nWarning signal request\nEBS22 Byte 2\nBit 3-4\nAnnex XII, point 4.2.3., 5.2.4. and 5.2.3.\nSupply line braking request\nEBS22 Byte 4\nBit 3-4\nAnnex XII, point 4.2.2.\nStop lamps request\nEBS22 Byte 4\nBit 5-6\nAnnex XII, point 5.2.5.1.\nVehicle pneumatic supply sufficient/insufficient\nEBS23 Byte 1\nBit 7-8\nAnnex XII, point 5.2.4.\n2.2. When the towed vehicle transmits the following message, the tractor shall provide a warning to the driver:\nFunction/Parameter\nISO 11992-2:2003Reference\nDriver Warning Required\nWarning signal request\nEBS22 Byte 2\nBit 3-4\npoint 2.2.1.29.2.1 of Annex I\n2.3. The following messages defined in ISO 11992-2:2003 including Amd.1:2007 shall be supported by the tractor or towed vehicle:\n2.3.1. Messages transmitted from the tractor to the towed vehicle:\nNo messages currently defined.\n2.3.2. Messages transmitted from the towed vehicle to the tractor:\nFunction/Parameter\nISO 11992-2:2003Reference\nVehicle service brake active/passive\nEBS22 Byte 1, Bit 5-6\nBraking via electric control line supported\nEBS22 Byte 4, Bit 7-8\nGeometric data index\nEBS24 Byte 1\nGeometric data index content\nEBS24 Byte 2\n2.4. The following messages shall be supported by the tractor or towed vehicle as appropriate when the vehicle is installed with a function associated with that parameter:\n2.4.1. Messages transmitted from the tractor to the towed vehicle:\nFunction/Parameter\nISO 11992-2:2003Reference\nVehicle type\nEBS11 Byte 2, Bit 3-4\nVDC (Vehicle Dynamic Control) Active/passive\nEBS11 Byte 2, Bit 5-6\nBrake demand value for front or left side of vehicle\nEBS11 Byte 7\nBrake demand value for rear or right side of vehicle\nEBS11 Byte 8\nROP (Roll Over Protection) system enabled/disabled\nEBS12 Byte 1, Bit 3-4\nYC (Yaw Control) system enabled/disabled\nEBS12 Byte 1, Bit 5-6\nEnable/disable towed vehicle ROP (Roll Over Protection) system\nEBS12 Byte 2, Bit 1-2\nEnable/disable towed vehicle YC (Yaw Control) system\nEBS12 Byte 2, Bit 3-4\nTraction help request\nRGE11 Byte 1, Bit 7-8\nLift axle 1 — position request\nRGE11 Byte 2, Bit 1-2\nLift axle 2 — position request\nRGE11 Byte 2, Bit 3-4\nSteering axle locking request\nRGE11 Byte 2, Bit 5-6\nSeconds\nTD11 Byte 1\nMinutes\nTD11 Byte 2\nHours\nTD11 Byte 3\nMonths\nTD11 Byte 4\nDay\nTD11 Byte 5\nYear\nTD11 Byte 6\nLocal minute offset\nTD11 Byte 7\nLocal hour offset\nTD11 Byte 8\n2.4.2. Messages transmitted from the towed vehicle to the tractor:\nFunction/Parameter\nISO 11992-2:2003Reference\nSupport of side or axle wise brake force distribution\nEBS21 Byte 2, Bit 3-4\nWheel based vehicle speed\nEBS21 Byte 3-4\nLateral acceleration\nEBS21 Byte 8\nVehicle ABS active/passive\nEBS22 Byte 1, Bit 1-2\nAmber warning signal request\nEBS22 Byte 2, Bit 5-6\nVehicle type\nEBS22 Byte 3, Bit 5-6\nLoading ramp approach assistance\nEBS22 Byte 4, Bit 1-2\nAxle load sum\nEBS22 Byte 5-6\nTyre pressure sufficient/insufficient\nEBS23 Byte 1, Bit 1-2\nBrake lining sufficient/insufficient\nEBS23 Byte 1, Bit 3-4\nBrake temperature status\nEBS23 Byte 1, Bit 5-6\nTyre/wheel identification (pressure)\nEBS23 Byte 2\nTyre/wheel identification (lining)\nEBS23 Byte 3\nTyre/wheel identification (temperature)\nEBS23 Byte 4\nTyre pressure (actual tyre pressure)\nEBS23 Byte 5\nBrake lining\nEBS23 Byte 6\nBrake temperature\nEBS23 Byte 7\nBrake cylinder pressure first axle left wheel\nEBS25 Byte 1\nBrake cylinder pressure first axle right wheel\nEBS25 Byte 2\nBrake cylinder pressure second axle left wheel\nEBS25 Byte 3\nBrake cylinder pressure second axle right wheel\nEBS25 Byte 4\nBrake cylinder pressure third axle left wheel\nEBS25 Byte 5\nBrake cylinder pressure third axle right wheel\nEBS25 Byte 6\nROP (Roll Over Protection) system enabled/disabled\nEBS25 Byte 7, Bit 1-2\nYC (Yaw Control) system enabled/disabled\nEBS25 Byte 7, Bit 3-4\nTraction help\nRGE21 Byte 1, Bit 5-6\nLift axle 1 position\nRGE21 Byte 2, Bit 1-2\nLift axle 2 position\nRGE21 Byte 2, Bit 3-4\nSteering axle locking\nRGE21 Byte 2, Bit 5-6\nTyre wheel identification\nRGE23 Byte 1\nTyre temperature\nRGE23 Byte 2-3\nAir leakage detection (Tyre)\nRGE23 Byte 4-5\nTyre pressure threshold detection\nRGE23 Byte 6, Bit 1-3\n2.5. The support of all other messages defined within ISO 11992-2:2003 including Amd.1:2007 is optional for the tractor and towed vehicle.",
  "extent": "E+W+S+N.I.",
  "status": null,
  "version": "current",
  "annotations": [],
  "outstanding_effects": [],
  "provenance": {
    "source": "legislation.gov.uk",
    "source_url": "https://www.legislation.gov.uk/eur/2015/68/annex/XII/appendix/1",
    "retrieved_at": "2026-11-01T14:46:56.586941+00:00"
  },
  "licence": "Open Government Licence v3.0",
  "licence_url": "https://www.nationalarchives.gov.uk/doc/open-government-licence/version/3/",
  "attribution": "Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives."
}