ISO 17458-5:2013

INTERNATIONAL ISO
STANDARD 17458-5
First edition
2013-02-01
Road vehicles— FlexRay
communications system —
Part 5:
Electrical physical layer conformance
test specification
Véhicules routiers — Système de communications FlexRay —
Partie 5: Spécification d'essai de conformité de la couche d'application
électrique
Reference number
©
ISO 2013
©  ISO 2013
All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form or by any means,
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Published in Switzerland
ii © ISO 2013 – All rights reserved

Contents Page
Foreword . v
Introduction . vi
1 Scope . 1
2 Normative references . 1
3 Terms, definitions, symbols and abbreviated terms . 1
3.1 Terms and definitions . 1
3.2 Abbreviated terms . 2
4 Document reference according to OSI model . 3
5 Conventions . 4
5.1 General . 4
5.2 Notational conventions . 4
6 Test environment . 4
6.1 Test case architecture . 4
6.2 Test method . 5
6.3 Test environment . 9
6.4 Test topology . 9
6.5 Test equipment . 27
7 Stress Conditions . 34
7.1 Ground shift . 34
7.2 Low battery voltage inside operational range . 35
7.3 Undervoltage . 36
7.4 Dynamic low battery voltage . 37
7.5 Dynamic low supply voltage . 38
7.6 Failures . 41
7.7 Babbling idiot . 47
7.8 Dynamic ground shift . 47
7.9 EMC . 48
7.10 ESD . 48
7.11 Temperature tests . 48
7.12 Common mode offset . 48
8 Parameter List . 49
8.1 General . 49
8.2 Static test cases . 50
8.3 Communication . 50
8.4 Host Interface . 54
8.5 Mode . 55
8.6 Power supply . 59
8.7 Environment . 61
8.8 Dynamic low battery voltage . 62
8.9 Dynamic low supply voltage . 62
8.10 Failure . 62
8.11 Functional class . 65
8.12 Simulation . 65
9 Test Cases for Bus Drivers. 65
9.1 Configuration . 66
9.2 Static test cases . 89
9.3 Test cases . 97
10 Test cases for Active Stars . 563
10.1 General . 563
10.2 Configuration . 563
10.3 Static test cases . 577
10.4 Test cases . 584
11 Test cases for Active Stars with communication controller interface . 717
11.1 Configuration . 717
11.2 Static test cases . 724
11.3 Test cases . 728
12 Test Cases for Active Stars with host interface . 795
12.1 Configuration . 795
12.2 Static test cases . 800
12.3 Test cases . 803
Annex A (normative) FlexRay parameters . 922
Bibliography . 930

iv © ISO 2013 – All rights reserved

Foreword
ISO (the International Organization for Standardization) is a worldwide federation of national standards bodies
(ISO member bodies). The work of preparing International Standards is normally carried out through ISO
technical committees. Each member body interested in a subject for which a technical committee has been
established has the right to be represented on that committee. International organizations, governmental and
non-governmental, in liaison with ISO, also take part in the work. ISO collaborates closely with the
International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization.
International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 2.
The main task of technical committees is to prepare International Standards. Draft International Standards
adopted by the technical committees are circulated to the member bodies for voting. Publication as an
International Standard requires approval by at least 75 % of the member bodies casting a vote.
Attention is drawn to the possibility that some of the elements of this document may be the subject of patent
rights. ISO shall not be held responsible for identifying any or all such patent rights.
ISO 17458-5 was prepared by Technical Committee ISO/TC 22, Road vehicles, Subcommittee SC 3,
Electrical and electronic equipment.
ISO 17458 consists of the following parts, under the general title Road vehicles — FlexRay communications
system:
 Part 1: General information and use case definition
 Part 2: Data link layer specification
 Part 3: Data link layer conformance test specification
 Part 4: Electrical physical layer specification
 Part 5: Electrical physical layer conformance test specification
Introduction
The FlexRay communications system is an automotive focused high speed network and was developed with
several main objectives which were defined beyond the capabilities of established standardized bus systems
like CAN and some other proprietary bus systems. Some of the basic characteristics of the FlexRay protocol
are synchronous and asynchronous frame transfer, guaranteed frame latency and jitter during synchronous
transfer, prioritization of frames during asynchronous transfer, single or multi-master clock synchronization,
time synchronization across multiple networks, error detection and signalling, and scalable fault tolerance.
The FlexRay communications system is defined for advanced automotive control applications. It serves as a
communication infrastructure for future generation high-speed control applications in vehicles by providing:
 A message exchange service that provides deterministic cycle based message transport;
 Synchronization service that provides a common time base to all nodes;
 Start-up service that provides an autonomous start-up procedure;
 Error management service that provides error handling and error signalling;
 Wakeup service that addresses the power management needs.
This bus system has been developed with several main objectives which were defined beyond the capabilities
of existing bus systems like CAN and some other proprietary bus systems. This advanced automotive
communication system specifies support for:
 Scalable static and dynamic message transmission (deterministic and flexible);
 High net data rate of 5 Mbit/sec; gross data rate approximately 10 Mbit/sec;
 Scalable fault-tolerance (single and dual channel);
 Error containment on the physical layer through an independent Bus Guardian;
 Fault tolerant clock synchronisation (global time base).
Since start of development the automotive industry world wide supported the specification development. The
FlexRay communications system has been successfully implemented in production vehicles today.
The ISO 17458 series specifies the use cases, the communication protocol and physical layer requirements of
an in-vehicle communication network called "FlexRay communications system".
This part of ISO 17458 has been established in order to define the use cases for vehicle communication
systems implemented on a FlexRay data link.
To achieve this, it is based on the Open Systems Interconnection (OSI) Basic Reference Model specified in
ISO/IEC 7498-1 [1] and ISO/IEC 10731 [6], which structures communication systems into seven layers. When
mapped on this model, the protocol and physical layer requirements specified by ISO 17458 are broken into:
 Diagnostic services (layer 7), specified in ISO 14229-1 [7], ISO 14229-4 [9];
 Presentation layer (layer 6), vehicle manufacturer specific;
 Session layer services (layer 5), specified in ISO 14229-2 [8];
vi © ISO 2013 – All rights reserved

 Transport layer services (layer 4), specified in ISO 10681-2 [5];
 Network layer services (layer 3), specified in ISO 10681-2 [5];
 Data link layer (layer 2), specified in ISO 17458-2, ISO 17458-3;
 Physical layer (layer 1), specified in ISO 17458-4, ISO 17458-5;
in accordance with Table 1.
Table 1 — FlexRay communications system specifications applicable to the OSI layers
Applicability OSI 7 layers FlexRay communications system Vehicle manufacturer enhanced
diagnostics
Application (layer 7) vehicle manufacturer specific ISO 14229-1, ISO 14229-4
Presentation (layer 6)
vehicle manufacturer specific vehicle manufacturer specific
Seven layer
Session (layer 5)
vehicle manufacturer specific ISO 14229-2
according to
ISO 7498-1
Transport (layer 4)
vehicle manufacturer specific
and
ISO 10681-2
ISO/IEC
Network (layer 3) vehicle manufacturer specific
Data link (layer 2)
ISO 17458-2, ISO 17458-3
Physical (layer 1)
ISO 17458-4, ISO 17458-5
Table 1 shows ISO 17458 Parts 2 – 5 being the common standards for the OSI layers 1 and 2 for the FlexRay
communications system and the vehicle manufacturer enhanced diagnostics.
The FlexRay communications system column shows vehicle manufacturer specific definitions for OSI layers
3 – 7.
The vehicle manufacturer enhanced diagnostics column shows application layer services covered by
ISO 14229-4 which have been defined in compliance with diagnostic services established in ISO 14229-1, but
are not limited to use only with them. ISO 14229-4 is also compatible with most diagnostic services defined in
national standards or vehicle manufacturer's specifications. The presentation layer is defined vehicle
manufacturer specific. The session layer services are covered by ISO 14229-2. The transport protocol and
network layer services are specified in ISO 10681.

INTERNATIONAL STANDARD ISO 17458-5:2013(E)

Road vehicles — FlexRay communications system — Part 5:
Electrical physical layer conformance test specification
IMPORTANT — According to ISO 17458-4, the FlexRay communications system was specified
focusing on a data rate of 10 Mbit/s. Therefore this conformance test specification regards the use of
systems with a data rate of 10 Mbit/s only whereas the physical layer also works properly in systems
with data rates in the range from 2,5 Mbit/s to 10 Mbit/s according to ISO 17458-4.
1 Scope
This part of ISO 17458 specifies the conformance test for the electrical physical layer of the FlexRay
communications system.
This part of ISO 17458 defines a test that considers ISO 9646 and ISO 17458-4.
The purpose of this part of ISO 17458 is to provide a standardized way to verify whether FlexRay Bus Driver
and Active Star products are compliant to ISO 17458-4. The primary motivation is to ensure a level of
interoperability of FlexRay Bus Drivers and Active Stars from different sources in a system environment.
This part of ISO 17458 provides all necessary technical information to ensure that test results will be identical
even on different test systems, provided that the particular test suite and the test system are compliant to the
content of this part of ISO 17458.
2 Normative references
The following referenced documents are indispensable for the application of this document. For dated
references, only the edition cited applies. For undated references, the latest edition of the referenced
document (including any amendments) applies.
ISO 17458-1, Road vehicles — FlexRay communications system — Part 1: General information and use case
definition
ISO 17458-2, Road vehicles — FlexRay communications system — Part 2: Data link layer specification
ISO 17458-4, Road vehicles — FlexRay communications system — Part 4: Electrical physical layer
specification
3 Terms, definitions, symbols and abbreviated terms
3.1 Terms and definitions
For the purposes of this document, the terms and definitions given in ISO 17458-1, ISO 17458-2, ISO 17458-4
and the following apply.
3.1.1
bus driver – communication controller interface
BD-CC-interface
see “BD-BD interface” when replacing one BD by a CC
3.1.2
cable
term that summarises all necessary components to implement a FlexRay transmission line:
two twisted or untwisted wires to be connected to BP and BM, isolators to mount the wires, an optional shield,
an optional wire to strengthen the shield, an optional sheath, etc.
3.1.3
communication controller – bus driver interface
CC-BD-interface
see “BD-CC-interface”
3.1.4
communication channel
FlexRay allows a single CC to distribute data-frames independent from each other on two different hardware
paths or topologies. From an abstract view each path is named “communication channel”.
3.2 Abbreviated terms
LT lower tester
UT upper tester
2 © ISO 2013 – All rights reserved

4 Document reference according to OSI model
Figure 1 depicts the FlexRay document reference according to OSI model.
ISO 17458-1
FlexRay communications
system - General
information and
use case definition
Vehicle Manufacturer
Enhanced Diagnostics
specific
ISO 14229-1 UDS
Vehicle
Specification, ISO 14229-4
subset
manufacturer
OSI Layer 7
requirements and UDSonFR
specific
Application
use case definition
ISO 22901 ODX
Vehicle
or vehicle
manufacturer
OSI Layer 6
manufacturer
specific
Presentation
specific
ISO 14229-2 UDS ISO 14229-2 UDS Vehicle
Session layer 1 : 1 Session layer manufacturer
OSI Layer 5
services services specific
Session
Standardized Service Primitive Interface
FlexRay communications system
Vehicle
manufacturer
OSI Layer 4
specific
Transport
ISO 10681-2
Communication on
FlexRay –
Communication
layer services
Vehicle
manufacturer
OSI Layer 3
specific
Network
ISO 17458-3
ISO 17458-2
FlexRay
FlexRay
communications system
OSI Layer 2
communications system
- Protocol conformance
Data Link
– Protocol specification
test specification
ISO 17458-5
ISO 17458-4
FlexRay
FlexRay
communications system
communications system
OSI Layer 1
- Electrical physical
- Electrical physical
Physical
layer conformance test
layer specification
specification
Figure 1 — FlexRay document reference according to OSI model
5 Conventions
5.1 General
ISO 17458, ISO 10681 and ISO 14229-4 are based on the conventions specified in the OSI Service
Conventions (ISO/IEC 10731) as they apply for physical layer, protocol, network & transport protocol and
diagnostic services.
5.2 Notational conventions
Notational conventions are listed in ISO 17458-4.
6 Test environment
6.1 Test case architecture
Each test case is specified with the following parts that must all be described unambiguous:
 Test case name
a name for this test case.
 Test purpose
a description of the motivation for this test case.
 Configuration
the state of the test environment for this test case.
 Preamble (setup state)
the steps to do before the specified test case could be executed.
 Test execution
the description of the execution of this test case.
 Postamble
the steps to do after the specified test case in order to have a defined state.
 Pass criteria
the criteria to judge the test result.
 Test instances
this is an optional part and contains test cases, that are summarised in tabular form because they are
executed separately with only minor changes in comparison to the first test case within this group.
Every test case is independent from the other test cases.
Several test cases are performed with the presence of stress conditions in order to check the robustness of
the IUT. These stress conditions are specified in detail in Clause 7.
The test parameters are FlexRay variables or constants that are defined in ISO 17458-4. These test
parameters are specified in detail in Clause 8.
Every test case starts at the beginning of the preamble and ends after the postamble. There is no delay
between the preamble and the test execution and between the test execution and the postamble.
The pass criteria are related only to the test execution.
4 © ISO 2013 – All rights reserved

Product specific items are not part of this International Standard.
6.2 Test method
6.2.1 General
The FlexRay BD has several interfaces, that are supplied by specified power supplies and stimuli and
observed by external components (signal measurements). The requirements for those generators and signal
measurements are specified in 6.5.
The interfaces of the BD are separated in two parts:
 Analog interface
bus (service provider) and supply pins.
 Digital interface
the pins for connecting the BD with the FlexRay protocol components.
Each test case describes the used pins for supplying, stimulation and observation.
The used test method for the FlexRay PL regarding [2] is the local test method, see also Figure 2.
The local test method contains a Lower Tester (LT) for the analog interface (bus) and an Upper Tester (UT)
for the digital interface. Both are part of the test system. The coordination of the test cases is done by the test
coordination procedure (TCP).
The whole test is controlled by the supervisor (SV) that is also part of the test system. The SV controls the UT
and LT with the TCP.
Figure 2 depicts the local test method of ISO 9646-1:1994.
Test System
PCO
Upper Tester
ASPs
TCP SV
Lower Tester
S
PDUs
U IUT
T
PCO ASPs
Service Provider
Key
ASP Abstract service primitive
IUT Implementation under test
PCO Point of control and observation
PDU Prodocol data unit
SV Supervisor
SUT System under test
TCP Test control procedure
Figure 2 — Local test method
6.2.2 Upper Tester
The UT has to provide test data, control and observe the IUT at its upper interface. The implementation has to
keep in mind the possibility of two different host interfaces of the IUT as specified in ISO 17458-4.
6 © ISO 2013 – All rights reserved

Figure 3 shows the mandatory signals of the IUT that the conformance test considers:
UT UT
TxD TxEN RxD RxEN BGE INH1 ERRN STBN TxD TxEN RxD RxEN BGE INH1 INTN SPI
IUT IUT
a) Option A b) Option B
Components Connections and supplies
IUT Implementation Under Test BGE Bus guardian enable
UT Upper Tester ERRN Error not
INH1 Inhibit 1
INTN Inhibit n
RxD Receive data
RxEN Receive enable
SPI Serial peripheral interface
STBN Standby not
TxD Transmit data
TxEN Transmit enable not
Figure 3 — Upper Tester
The tasks of the UT are:
 Provide test data streams
 Change the mode of the IUT
 Observe and acquire the error line
 Observe and acquire the received data stream
 Provide IUT functions to the supervisor
 Provide test system functionality to the IUT
6.2.3 Lower Tester
The Lower Tester has to provide data and observe the IUT at its lower interface – the supply and bus interface
of the IUT. Figure 4 shows an overview of the Lower Tester.
IUT
V GND BP BM
CC
LT
Components Connections and supplies
IUT Implementation Under Test BM Bus minus
LT Lower Tester BP Bus plus
GND Ground connection
V Supply voltage for digital signals
CC
Figure 4 — Lower Tester
The tasks of the Lower Tester are:
 Generate and control bus failures
 Generate ground shift
 Control the supply voltages
 Provide IUT functions to the supervisor
 Provide test system functionality to the IUT
6.2.4 Supervisor
The SV has to control and observe the whole test system and communicates with the IUT via the LT and UT.
The tasks of the SV are:
 Control the LT and UT
 Observe and acquire the LT and UT
 Control and observe optional measurement devices
 Execute and coordinate test procedures
 Create the test report
8 © ISO 2013 – All rights reserved

6.3 Test environment
The following parameters are constants within the conformance test and used in the standard environment:
 Temperature: ambient
 Moisture: ambient
 Test topology: as described in 6.4
 Termination: as described in the test topology; differences are specified in the used test case
 Amount of nodes: as described in the test topology
 Amount of Stars: as described in the test topology
 Baud rate: 10 Mbit/s (gdBit = 100 ns) as part of the harmonized baud rates in the FlexRay consortium
 Common mode choke: as specified in 6.4.6
6.4 Test topology
6.4.1 General
The purpose is to test the expected worst case of a possible topology with the maximum number of cascaded
Active Stars, one passive star and one passive bus.
It is sufficient to test only with one physical channel, because the behaviour of the physical layer is
independent from the number of used channels in a communication network.
The used test topology is described in the following subclauses and shown in Figure 5.
Figure 5 depicts the conformance test topology.
N
CS
T
BS BS BS
3 2 1
2 4
PS T AS T
T
CS
T T
T
N N N N N N N N N
24 23 22 21 2 14 13 12 11
GND
Components Connections and supplies
AS Active Star GND System ground
BS Bus splice x
x
CS Cable shield connection
N FlexRay node x
X
PS Passive Star
T Bus termination
is not a supply voltage. It is a voltage used as stress condition where BP and BM are short-circuit to this
NOTE 1 VANY
voltage. V is product-specific and varies from the implementation of supply voltages of the IUT and the ground shift.
ANY
NOTE 2 Further details of the cable lengths used in the test topology are given in Table 2.
Figure 5 — Conformance test topology
Description of the test topology:
 For detailed description of the AS hardware see 6.4.7.
 A detailed description of the passive star hardware is given in 6.4.8.
 A detailed description of the passive bus hardware is given in 6.4.9.
 Nodes without ground shift stress shall be connected with their negative terminal to one of the ground
splices that are mounted on the stainless steel chassis.
 The four ground splices shall be mounted near the nodes and the AS to consider the length of the GND
cables of the nodes and the AS. The following nodes are connected to one of the GND splices:
GND splice 1: Nodes 11, 12, 13 and 14
GND splice 2: Nodes 21, 22, 23 and 24
GND splice 3: Nodes 1, 2 and the AS
GND splice 4: negative terminal of all supplies
10 © ISO 2013 – All rights reserved

1)
 Nodes that are stressed with ground shift are connected to a switch that guarantees that these nodes
could be connected directly to ground or are stressed by ground shift. This switch shall be controllable by
the SV. The attenuation of the used switches shall be as small as possible. The switch shall be on the
nodes and the AS. The connections from the switch to the terminals shall be as short as possible.
 The ground shift terminal of the nodes and the AS are connected to the positive terminal of the ground
shift generator. The length of this cable is 1 m.
 The negative terminal of the ground shift generator is connected to the GND splice of the test system
(chassis). The length of this cable is 1 m.
splice (+) that is mounted on the chassis. The V splice is a
 All nodes shall be connected to the V
BAT BAT
separate board on which the splices for the supply voltages are placed.
 The AS shall be connected to the V splice (+) for the AS that is mounted on the chassis.
BAT
 The AS shall be connected to the V splice (+) for the AS that is mounted on the chassis.
CC
splice (+) for the AS that is mounted on the chassis.
 The AS shall be connected to the V
IO
 The AS shall be connected to the V splice with a cable length of 3 m.
ANY
 Node 24 shall be connected to the V splice (+) for the node that is mounted on the chassis.
BAT
 Node 24 shall be connected to the V splice (+) for the node that is mounted on the chassis.
CC
 Node 24 shall be connected to the V splice (+) for the node that is mounted on the chassis.
IO
 Node 24 shall be connected to the V splice with a cable length of 3 m.
ANY
 Node 23 shall be connected to the V splice (+) for the node that is mounted on the chassis.
CC
 Node 23 shall be connected to the V splice (+) for the node that is mounted on the chassis.
IO
 Node 21 shall be connected to the V splice (+) for the node that is mounted on the chassis.
CC
 Node 21 shall be connected to the V splice (+) for the node that is mounted on the chassis.
IO
 The chassis shall be a steel plate for the ground connections of the IUTs and the power supply.
 The chassis is connected to the negative terminal of the power supply (clamp 31).
 The V splice is connected to the positive terminal of the power supply (clamp 30).
BAT
 The V splice for the nodes is connected to the positive terminal of the nodes V power supply.
BAT BAT
 The V splice for the AS is connected to the positive terminal of the AS V power supply.
BAT BAT
 The V splice for the AS is connected to the positive terminal of the first +5 V power supply.
CC
 The V splice for the node 24 is connected to the positive terminal of the V power supply for node 24.
BAT BAT
1) The switch shall be on the nodes and the AS. The connections from the switch to the terminals shall be as short as
possible.
 The V splice for the node 24 is connected to the positive terminal of the second +5 V power supply.
CC
 The V splice for the node 24 is connected to the positive terminal of the V reference voltage.
IO IO
 All communication channels shall be terminated regarding ISO 17458-4.
 The shield of every link shall be terminated regarding ISO 17458-4.
 The bus cables shall meet the requirements of ISO 17458-4; see also 6.4.10.1. All bus cables are
shielded. The shield is only connected at the AS (see also 6.4.3).
 The supply cables shall meet the requirements specified in 6.4.10.2.
The following topics are part of the implementation of the conformance test, but have to meet ISO 17458-4:
 the type of mounting of the IUTs on the chassis
 the type and manufacturer of the cables
 the type and manufacturer of the connectors
 the type of the splices
 the wiring of the IUT
6.4.2 Cable overview of the test topology
Table 2 gives a full overview of the cables of the test topology
Table 2 — Cable overview of test topology
Length
No. Type From To Termination Remarks
m
Active
1 Bus wire Node 1 1 Both ends —
Star
GND
2 Ground wire Node 1 0,5 — —
splice 3
3 Supply wire Node 1 V splice 2 — —
BAT
Active
4 Bus wire Node 2 3,5 Both ends —
Star
This node emulates an ECU in a roof
GND
5 Ground wire Node 2 5 — of a vehicle where no ground splice in
splice 3
the roof is available.
6 Supply wire Node 2 V splice 6 — —
BAT
Bus splice No
7 Bus wire Node 11 0,3 Part of the passive bus
1 termination
GND
8 Ground wire Node 11 0,5 — —
splice 1
9 Supply wire Node 11 V splice 6 — —
BAT
Bus splice Only at
10 Bus wire Node 12 0,3 Part of the passive bus
1 node 12
12 © ISO 2013 – All rights reserved

Length
No. Type From To Termination Remarks
m
GND
11 Ground wire Node 12 0,5 — —
splice 1
12 Supply wire Node 12 V splice 8 — —
BAT
Bus splice No
13 Bus wire Node 13 0,3 Part of the passive bus
2 termination
GND
14 Ground wire Node 13 0,5 — —
splice 1
15 Supply wire Node 13 V splice 9 — —
BAT
Bus splice No
16 Bus wire Node 14 0,3 Part of the passive bus
3 termination
GND
17 Ground wire Node 14 0,5 — —
splice 1
18 Supply wire Node 14 V splice 10 — —
BAT
Passive No
19 Bus wire Node 21 0,25 Connected to the passive star
star termination
GND
20 Ground wire Node 21 0,5 — —
splice 2
21 Supply wire Node 21 V splice 4 — —
BAT
Passive No
22 Bus wire Node 22 0,25 Connected to the passive star
star termination
GND
23 Ground wire Node 22 0,5 — —
splice 2
24 Supply wire Node 22 V splice 3 — —
BAT
Passive Only at
25 Bus wire Node 23 1 Connected to the passive star
star node 23
GND
26 Ground wire Node 23 0,5 — —
splice 2
27 Supply wire Node 23 V splice 5 — —
BAT
Ground shift V
GS
28 Node 23 2 — Connected to positive terminal
a
supply
wire
Ground shift
V GND Connected to negative terminal
GS
29 1 —
b
supply splice 4 (ground wire of node 23)
wire
Passive No
30 Bus wire Node 24 0,25 Connected to the passive star
star termination
GND
31 Ground wire Node 24 0,5 — —
splice 2
32 Supply wire Node 24 V splice 4 — —
BAT
Ground shift V
GS
33 Node 24 2 — Connected to positive terminal
a
wire supply
Ground shift V GND Connected to negative terminal
GS
34 1 —
b
wire supply splice 4 (ground wire of node 24)
Length
No. Type From To Termination Remarks
m
Active GND
35 Ground wire 0,5 — —
Star splice 2
Active
36 Supply wire V splice 4 — —
BAT
Star
Active
37 Supply wire V splice 4 — —
CC
Star
Active Passive Only at
38 Bus wire 11 —
Star star Active Star
Active Bus splice Only at
39 Bus Wire 1,5 —
Star 3 Active Star
Ground shift
V Active
GS
40 2 — Connected to positive terminal
a
supply Star
wire
Ground shift V GND Connected to negative terminal
GS
41 1 —
b
supply splice 4 (ground wire of AS)
wire
Bus Bus splice No
42 Bus wire 10 Part of the passive bus
splice 1 2 termination
Bus Bus splice No
43 Bus wire 0,15 Part of the passive bus
splice 2 3 termination
44 Supply wire Battery V splice 3 — V supply for nodes
BAT BAT
GND
45 Ground wire Battery 1,5 — V supply for nodes
BAT
splice 4
46 Supply wire Battery V splice 3 — V supply for AS
BAT BAT
GND
47 Ground wire Battery 1,5 — V supply for AS
BAT
splice 4
V
CC
48 Supply wire V splice 3 — V supply for AS
CC CC
Supply
V GND
CC
49 Ground wire 1,5 — V supply for AS
CC
Supply splice 4
V
IO
50 Supply wire V splice 4 — V supply for AS
CC IO
Supply
V GND
IO
51 Ground wire 1,5 — V supply for AS
IO
Supply splice 4
52 Supply wire Battery V splice 4 — V supply for node 24
BAT BAT
GND
53 Ground wire Battery 1,5 — V supply for node 24
BAT
splice 4
V
CC
54 Supply wire V splice 4 — V supply for node 21, 23 & 24
CC CC
Supply
V GND
CC
55 Ground wire 1,5 — V supply for node 21, 23 & 24
CC
Supply splice 4
V
IO
56 Supply wire V splice 4 — V supply for node 21, 23 & 24
IO IO
Supply
V GND
IO
57 Ground wire 1,5 — V supply for node 21, 23 & 24
IO
Supply splice 4
Passive GND
58 Ground wire 0,3 — Ground connection of PS
star splice 2
14 © ISO 2013 – All rights reserved

Length
No. Type From To Termination Remarks
m
V
any
59 Stress wire Node 24 3 — Stress voltage for node 24
supply
V Active
any
60 Stress wire 3 — Stress voltage for AS
supply Star
Active
61 Bus wire Node 1 1 Both ends —
Star
GND
62 Ground wire Node 1 0,5 — —
splice 3
Battery
63 Supply wire Node 1 2 — —
splice
Active
64 Bus wire Node 2 3,5 Both ends —
Star
GND
65 Ground wire Node 2 5 — —
splice 3
Battery
66 Supply wire Node 2 6 — —
splice
Bus splice No
67 Bus wire Node 11 0,3 Part of the passive bus
1 termination
GND
68 Ground wire Node 11 0,5 — —
splice 1
Battery
69 Supply wire Node 11 6 — —
splice
Bus splice Only at
70 Bus wire Node 12 0,3 Part of the passive bus
1 node 12
GND
71 Ground wire Node 12 0,5 — —
splice 1
Battery
72 Supply wire Node 12 8 — —
splice
Bus splice No
73 Bus wire Node 13 0,3 Part of the passive bus
2 termination
GND
74 Ground wire Node 13 0,5 — —
splice 1
Battery
75 Supply wire Node 13 9 — —
splice
Bus splice No
76 Bus wire Node 14 0,3 Part of the passive bus
3 termination
GND
77 Ground wire Node 14 0,5 — —
splice 1
Battery
78 Supply wire Node 14 10 — —
splice
Passive No
79 Bus wire Node 21 0,25 Connected to the passive star
star termination
GND
80 Ground wire Node 21 0,5 — —
splice 2
Battery
81 Supply wire Node 21 4 — —
splice
Length
No. Type From To Termination Remarks
m
Passive No
82 Bus wire Node 22 0,25 Connected to the passive star
star termination
GND
83 Ground wire Node 22 0,5 — —
splice 2
Battery
84 Supply wire Node 22 3 — —
splice
Passive Only at
85 Bus wire Node 23 1 Connected to the passive star
star node 23
GND
86 Ground wire Node 23 0,5 — —
splice 2
Battery
87 Supply wire Node 23 5 — —
splice
Ground shift
VGS
88 Node 23 2 — Connected to positive terminal
a
wire supply
Ground shift V GND Connected to negative terminal
GS
89 1 —
b
wire supply splice 4 (ground wire of node 23)
Passive No
90 Bus wire Node 24 0,25 Connected to the passive star
star termination
GND
91 Ground wire Node 24 0,5 — —
splice 2
Battery
92 Supply wire Node 24 4 — —
splice
Ground shift V
GS
93 Node 24 2 — Connected to positive terminal
a
wire supply
Ground shift
V GND Connected to negative terminal
GS
94 1 —
b
supply splice 4 (ground wire of node 24)
wire
Active GND
95 Ground wire 0,5 — —
Star splice 2
Active
96 Supply wire V splice 4 — —
BAT
Star
Active
97 Supply wire V splice 4 — —
CC
Star
Active Passive Only at
98 Bus wire 11 —
Star star Active Star
Active Bus splice Only at
99 Bus Wire 1,5 —
Star 3 Active Star
Ground shift V Active
GS
100 2 — Connected to positive terminal
a
wire supply Star
Ground shift V GND Connected to negative terminal
GS
101 1 —
b
wire supply splice 4 (ground wire of AS)
Bus Bus splice No
102 Bus wire 10 Part of the passive bus
splice 1 2 termination
Bus Bus splice No
103 Bus wire 0,15 Part of the passive bus
splice 2 3 termination
Battery
104 Supply wire Battery 3 — V supply for nodes
BAT
splice
16 © ISO 2013 – All rights reserved

Length
No. Type From To Termination Remarks
m
GND
105 Ground wire Battery 1,5 — V supply for nodes
BAT
splice 4
Battery
106 Supply wire Battery 3 — V supply for AS
BAT
splice
GND
107 Ground wire Battery 1,5 — V supply for AS
BAT
splice 4
V
CC
108 Supply wire V splice 3 — V supply for AS
CC CC
Supply
V GND
CC
109 Ground wire 1,5 — V supply for AS
CC
Supply splice 4
V
IO
110 Supply wire V splice 4 — V supply for AS
CC IO
Supply
V GND
IO
111 Ground wire 1,5 — V supply for AS
IO
Supply splice 4
Battery
112 Supply wire Battery 4 — V supply for node 24
BAT
splice
GND
113 Ground wire Battery 1,5 — V supply for node 24
BAT
splice 4
V
CC
114 Supply wire V splice 4 — V supply for node 21 & 24
CC CC
Supply
V GND
CC
115 Ground wire 1,5 — V supply for node 21 & 24
CC
Supply splice 4
V
IO
116 Supply wire V splice 4 — V supply for node 21 & 24
IO IO
Supply
V GND
IO
117 Ground wire 1,5 — V supply for node 21 & 24
IO
Supply splice 4
Passive GND
118 Ground wire 0,3 — Ground connection of PS
star splice 2
V
any
119 Stress wire Node 24 3 — Stress voltage for node 24
supply
V Active
any
120 Stress wire 3 — Stress voltage for AS
supply Star
a
Positive terminal of the Ground Shift Generator
b
Negative terminal of the Ground Shift Generator

6.4.3 Shield
Each communication link shall have one cable shield connection. The conformance test uses one Active Star,
that is the central point of shield connection in the topology.
Table 3 defines the specified shield connection with bus cable, connectors, Active Star and node:
Table 3 — Shield connection components
Name Description Typ Unit
Damping resistance 1 000 Ω
R
s
Tolerance 1 %
Capacitance 470 nF
C
s
Tolerance 10 %
L , R , R and C Components of the passive star, see 6.4.8.
2 2 3 1
Figure 6 depicts the cable shield connection.
N AS PS N
BC BC BC
C C
s s
L L
R R
s s
R R
2 2
C
CS CS CS
R
Components
AS Active Star
BC Bus cable
CS Cable shield
...