{
  "url": "https://openlegislation.uk/eu-regulation-2016-799/annex-1/appendix-6",
  "json_url": "https://openlegislation.uk/eu-regulation-2016-799/annex-1/appendix-6.json",
  "legislation": "eur/2016/799",
  "legislation_title": "Commission Implementing Regulation (EU) 2016/799 of 18 March 2016 implementing Regulation (EU) No 165/2014 of the European Parliament and of the Council laying down the requirements for the construction, testing, installation, operation and repair of tachographs and their components (Text with EEA relevance)",
  "legislation_url": "https://openlegislation.uk/eu-regulation-2016-799",
  "path": "annex/1/appendix/6",
  "kind": "appendix",
  "number": "6",
  "heading": null,
  "text": "FRONT CONNECTOR FOR CALIBRATION AND DOWNLOAD\n1.\nHARDWARE\n1.1.\nConnector\nINT_001\nThe downloading/calibration connector shall be a 6 pin connector, accessible on the front panel without the need to disconnect any part of the tachograph, and shall comply with the following drawing (all dimensions in millimetres):\nThe following diagram shows a typical 6 pin mating plug:\n1.2.\nContact allocation\nINT_002\nContacts shall be allocated in accordance with the following table:\nPin\nDescription\nRemark\n1\nBattery minus\nConnected to the battery minus of the vehicle\n2\nData communication\nK-line (ISO 14230-1)\n3\nRxD — Downloading\nData input to tachograph\n4\nInput/output signal\nCalibration\n5\nPermanent power output\nThe voltage range is specified to be that of the vehicle power minus 3V to allow for the voltage drop across the protective circuitry\nOutput 40 mA\n6\nTxD — Downloading\nData output from tachograph\n1.3.\nBlock diagram\nINT_003\nThe block diagram shall comply with the following:\n2.\nDOWNLOADING INTERFACE\nINT_004\nThe downloading interface shall comply to RS232 specifications.\nINT_005\nThe downloading interface shall use one start bit, 8 data bits LSB first, one even parity bit and 1 stop bit.\nData byte organisation\nStart bitone bit with logic level 0;\nData bitstransmitted with LSB first;\nParity biteven parity\nStop bitone bit with logic level 1\nWhen numerical data composed by more than one byte are transmitted, the most significant byte is transmitted first and the least significant byte last.\nINT_006\nTransmission baud rates shall be adjustable from 9 600 bps to 115 200 bps. Transmission shall be achieved at the highest possible transmission speed, the initial baud rate after a start of communication being set at 9 600 bps.\n3.\nCALIBRATION INTERFACE\nINT_007\nThe data communication shall comply to ISO 14230-1 Road vehicles — Diagnostic systems — Keyword protocol 2000 — Part 1: Physical layer, First edition: 1999.\nINT_008\nThe input/output signal shall comply with the following electrical specification:\nParameter\nMinimum\nTypical\nMaximum\nRemark\nU low (in)\n1,0 V\nI = 750 μA\nU high (in)\n4 V\nI = 200 μA\nFrequency\n4 kHz\nU low (out)\n1,0 V\nI = 1 mA\nU high (out)\n4 V\nI = 1 mA\nINT_009\nThe input/output signal shall comply with the following timing diagrams:",
  "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/2016/799/annex/1/appendix/6",
    "retrieved_at": "2026-11-01T14:45:49.686558+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."
}