ISO 11783-2:2012
Tractors and machinery for agriculture and forestry — Serial control and communications data network — Part 2: Physical layer
ISO 11783 as a whole specifies a serial data network for control and communications on forestry or agricultural tractors and mounted, semi-mounted, towed or self-propelled implements. Its purpose is to standardize the method and format of transfer of data between sensors, actuators, control elements and information storage and display units, whether mounted on, or part of, the tractor or implement, and to provide an open interconnect system for electronic systems used by agricultural and forestry equipment. ISO 11783-2:2012 defines and describes the network's 250 kbit/s, twisted, non-shielded, quad-cable physical layer.
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1 Scope
2 Normative references
3 Terms and definitions
4 General description
4.1 Network physical layer
4.2 Physical media
4.3 Differential voltage
4.4 Bus
4.4.1 Levels
4.4.1.1 General
4.4.1.2 During arbitration
4.4.2 Voltage range
4.4.3 Termination
4.5 Resistance and capacitance
4.5.1 Internal resistance (Rin), capacitance (Cin)
4.5.2 Differential internal resistance (Rdiff), capacitance (Cdiff)
4.6 Bit time
4.7 AC parameters
5 Functional description
6 Electrical specifications
6.1 Electrical data
6.1.1 General
6.1.2 Absolute maximum ratings
6.1.3 DC parameters
6.1.3.1 Bus-disconnected ECU
6.1.3.2 Bus-connected ECU
6.1.4 Bus voltages (operational)
6.1.5 Electrostatic discharge (ESD)
6.2 Physical media parameters
6.2.1 Twisted quad cable
6.2.2 Topology
6.2.3 ECU connection to TBC_PWR and TBC_RTN
6.2.4 Power For TBC_PWR and TBC_RTN
6.3 TBC parameters
6.4 Connectors
6.4.1 General
6.4.1.1 Electrical performance
6.4.1.2 Mechanical characteristics
6.4.2 Bus extension connector
6.4.2.1 Dimensions
6.4.2.2 Pin allocations
6.4.3 Implement bus breakaway connector
6.4.3.1 Terminating bias circuit
6.4.3.2 Dimensions
6.4.3.3 Pin allocations
6.4.3.3.1 General
6.4.3.3.2 Ground isolation
6.4.4 In-cab connector
6.4.4.1 General
6.4.4.2 In-cab connector receptacle dimensions
6.4.4.3 Incab connector pin allocations
6.4.4.4 Incab connector plug dimensions
6.4.4.5 Incab connector cable connections
6.4.5 Diagnostic connector
6.4.5.1 Receptacle dimensions
6.4.5.2 Locking plug dimensions
6.4.5.3 Non-locking plug dimensions
6.4.5.4 Pin allocations
6.4.5.5 Diagnostic connector dimensions
7 Conformance tests
7.1 General requirements
7.2 Internal resistance
7.3 Internal differential resistance
7.4 ECU recessive input threshold
7.5 ECU dominant input threshold
7.6 ECU dominant output
7.7 ECU internal delay time
8 Bus failure and fault confinement
8.1 General
8.2 Loss of network connection
8.3 Node power or ground loss
8.4 Open and short failures
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1 Scope
2 Normative references
3 Terms and definitions
4 General description
4.1 Network physical layer
4.2 Physical media
4.3 Differential voltage
4.4 Bus
4.4.1 Levels
4.4.1.1 General
4.4.1.2 During arbitration
4.4.2 Voltage range
4.4.3 Termination
4.5 Resistance and capacitance
4.5.1 Internal resistance (Rin), capacitance (Cin)
4.5.2 Differential internal resistance (Rdiff), capacitance (Cdiff)
4.6 Bit time
4.7 AC parameters
5 Functional description
6 Electrical specifications
6.1 Electrical data
6.1.1 General
6.1.2 Absolute maximum ratings
6.1.3 DC parameters
6.1.3.1 Bus-disconnected ECU
6.1.3.2 Bus-connected ECU
6.1.4 Bus voltages (operational)
6.1.5 Electrostatic discharge (ESD)
6.2 Physical media parameters
6.2.1 Twisted quad cable
6.2.2 Topology
6.2.3 ECU connection to TBC_PWR and TBC_RTN
6.2.4 Power For TBC_PWR and TBC_RTN
6.3 TBC parameters
6.4 Connectors
6.4.1 General
6.4.1.1 Electrical performance
6.4.1.2 Mechanical characteristics
6.4.2 Bus extension connector
6.4.2.1 Dimensions
6.4.2.2 Pin allocations
6.4.3 Implement bus breakaway connector
6.4.3.1 Terminating bias circuit
6.4.3.2 Dimensions
6.4.3.3 Pin allocations
6.4.3.3.1 General
6.4.3.3.2 Ground isolation
6.4.4 In-cab connector
6.4.4.1 General
6.4.4.2 In-cab connector receptacle dimensions
6.4.4.3 Incab connector pin allocations
6.4.4.4 Incab connector plug dimensions
6.4.4.5 Incab connector cable connections
6.4.5 Diagnostic connector
6.4.5.1 Receptacle dimensions
6.4.5.2 Locking plug dimensions
6.4.5.3 Non-locking plug dimensions
6.4.5.4 Pin allocations
6.4.5.5 Diagnostic connector dimensions
7 Conformance tests
7.1 General requirements
7.2 Internal resistance
7.3 Internal differential resistance
7.4 ECU recessive input threshold
7.5 ECU dominant input threshold
7.6 ECU dominant output
7.7 ECU internal delay time
8 Bus failure and fault confinement
8.1 General
8.2 Loss of network connection
8.3 Node power or ground loss
8.4 Open and short failures