This European Standard is applicable to safety-related electronic systems using for digital communication purposes a transmission system which was not necessarily designed for safety-related applications and which is

– under the control of the designer and fixed during the lifetime, or
– partly unknown or not fixed, however unauthorised access can be excluded, or
– not under the control of the designer, and also unauthorised access has to be considered.

Both safety-related equipment and non safety-related equipment can be connected to the transmission system.

This standard gives the basic requirements needed to achieve safety-related communication between safety-related equipment connected to the transmission system.

Cross References:
EN 50129:2003
TR EN 50126
IEC 61025
UIC 738
ORE A155 .1
IEC 9797-2:2002
FIPS PUB 197:2001
IEC 10118-2:2000
IEC 9796-3:2006
IEC 11770-3:2008
EN 61025
IEC 10116:2006
IEC 11770-2:2008
IEC 9796-2:2002
ISO/IEC 10118-3:2004
ISO/IEC 9797-1:1999
ISO/IEC 10118-1:2000
ISO/IEC 11770-1:1996
ISO/IEC 9979:1999
ISO/IEC 10118-4:1998


Incorporates the following:
Amendment, February 2020