# 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), Appendix 1

Extent: E+W+S+N.I.

Compatibility between tractors and towed vehicles with respect to ISO 11992 data communications
1.
General
1.1.
The requirements of this Appendix shall only apply to tractors and towed vehicles equipped with an electric control line.
1.2.
The 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.
1.3.
This 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.
2.
The parameters defined within ISO 11992-2:2003 including Amd.1:2007 that are transmitted by the electric control line shall be supported as follows:
2.1. The following functions and associated messages are those specified within this Regulation that shall be supported by the tractor or towed vehicle as appropriate:
2.1.1. Messages transmitted from the tractor to the towed vehicle:
Function/Parameter
ISO 11992-2:2003Reference
Reference in this Regulation
Service/secondary brake demand value
EBS11
Byte 3-4
Appendix 1 to Annex II, point 3.1.3.2.
Two electrical circuits brake demand value
EBS12
Byte 3 Bit 1-2
Annex XII, point 3.1.
Pneumatic control line
EBS12
Byte 3 Bit 5-6
Annex XII, point 3.1.
2.1.2. Messages transmitted from the towed vehicle to the tractor:
Function/Parameter
ISO 11992-2:2003Reference
Reference in this Regulation
Vehicle electrical supply sufficient/insufficient
EBS22 Byte 2
Bit 1-2
Annex XII, point 5.2.3.
Warning signal request
EBS22 Byte 2
Bit 3-4
Annex XII, point 4.2.3., 5.2.4. and 5.2.3.
Supply line braking request
EBS22 Byte 4
Bit 3-4
Annex XII, point 4.2.2.
Stop lamps request
EBS22 Byte 4
Bit 5-6
Annex XII, point 5.2.5.1.
Vehicle pneumatic supply sufficient/insufficient
EBS23 Byte 1
Bit 7-8
Annex XII, point 5.2.4.
2.2. When the towed vehicle transmits the following message, the tractor shall provide a warning to the driver:
Function/Parameter
ISO 11992-2:2003Reference
Driver Warning Required
Warning signal request
EBS22 Byte 2
Bit 3-4
point 2.2.1.29.2.1 of Annex I
2.3. The following messages defined in ISO 11992-2:2003 including Amd.1:2007 shall be supported by the tractor or towed vehicle:
2.3.1. Messages transmitted from the tractor to the towed vehicle:
No messages currently defined.
2.3.2. Messages transmitted from the towed vehicle to the tractor:
Function/Parameter
ISO 11992-2:2003Reference
Vehicle service brake active/passive
EBS22 Byte 1, Bit 5-6
Braking via electric control line supported
EBS22 Byte 4, Bit 7-8
Geometric data index
EBS24 Byte 1
Geometric data index content
EBS24 Byte 2
2.4. 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:
2.4.1. Messages transmitted from the tractor to the towed vehicle:
Function/Parameter
ISO 11992-2:2003Reference
Vehicle type
EBS11 Byte 2, Bit 3-4
VDC (Vehicle Dynamic Control) Active/passive
EBS11 Byte 2, Bit 5-6
Brake demand value for front or left side of vehicle
EBS11 Byte 7
Brake demand value for rear or right side of vehicle
EBS11 Byte 8
ROP (Roll Over Protection) system enabled/disabled
EBS12 Byte 1, Bit 3-4
YC (Yaw Control) system enabled/disabled
EBS12 Byte 1, Bit 5-6
Enable/disable towed vehicle ROP (Roll Over Protection) system
EBS12 Byte 2, Bit 1-2
Enable/disable towed vehicle YC (Yaw Control) system
EBS12 Byte 2, Bit 3-4
Traction help request
RGE11 Byte 1, Bit 7-8
Lift axle 1 — position request
RGE11 Byte 2, Bit 1-2
Lift axle 2 — position request
RGE11 Byte 2, Bit 3-4
Steering axle locking request
RGE11 Byte 2, Bit 5-6
Seconds
TD11 Byte 1
Minutes
TD11 Byte 2
Hours
TD11 Byte 3
Months
TD11 Byte 4
Day
TD11 Byte 5
Year
TD11 Byte 6
Local minute offset
TD11 Byte 7
Local hour offset
TD11 Byte 8
2.4.2. Messages transmitted from the towed vehicle to the tractor:
Function/Parameter
ISO 11992-2:2003Reference
Support of side or axle wise brake force distribution
EBS21 Byte 2, Bit 3-4
Wheel based vehicle speed
EBS21 Byte 3-4
Lateral acceleration
EBS21 Byte 8
Vehicle ABS active/passive
EBS22 Byte 1, Bit 1-2
Amber warning signal request
EBS22 Byte 2, Bit 5-6
Vehicle type
EBS22 Byte 3, Bit 5-6
Loading ramp approach assistance
EBS22 Byte 4, Bit 1-2
Axle load sum
EBS22 Byte 5-6
Tyre pressure sufficient/insufficient
EBS23 Byte 1, Bit 1-2
Brake lining sufficient/insufficient
EBS23 Byte 1, Bit 3-4
Brake temperature status
EBS23 Byte 1, Bit 5-6
Tyre/wheel identification (pressure)
EBS23 Byte 2
Tyre/wheel identification (lining)
EBS23 Byte 3
Tyre/wheel identification (temperature)
EBS23 Byte 4
Tyre pressure (actual tyre pressure)
EBS23 Byte 5
Brake lining
EBS23 Byte 6
Brake temperature
EBS23 Byte 7
Brake cylinder pressure first axle left wheel
EBS25 Byte 1
Brake cylinder pressure first axle right wheel
EBS25 Byte 2
Brake cylinder pressure second axle left wheel
EBS25 Byte 3
Brake cylinder pressure second axle right wheel
EBS25 Byte 4
Brake cylinder pressure third axle left wheel
EBS25 Byte 5
Brake cylinder pressure third axle right wheel
EBS25 Byte 6
ROP (Roll Over Protection) system enabled/disabled
EBS25 Byte 7, Bit 1-2
YC (Yaw Control) system enabled/disabled
EBS25 Byte 7, Bit 3-4
Traction help
RGE21 Byte 1, Bit 5-6
Lift axle 1 position
RGE21 Byte 2, Bit 1-2
Lift axle 2 position
RGE21 Byte 2, Bit 3-4
Steering axle locking
RGE21 Byte 2, Bit 5-6
Tyre wheel identification
RGE23 Byte 1
Tyre temperature
RGE23 Byte 2-3
Air leakage detection (Tyre)
RGE23 Byte 4-5
Tyre pressure threshold detection
RGE23 Byte 6, Bit 1-3
2.5. The support of all other messages defined within ISO 11992-2:2003 including Amd.1:2007 is optional for the tractor and towed vehicle.

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Source: https://www.legislation.gov.uk/eur/2015/68/annex/XII/appendix/1 (the official version)
Page: https://openlegislation.uk/eu-regulation-2015-68/annex-XII/appendix-1
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.