Decided to make this a separate thread.
Assuming by next week the list of harmonized standards includes EN 954-1 but
the relevant type C (etc.) standard for a specific machine type only references
(EN) ISO 13849-1.
Would it be OK to claim presumption of conformity using such a harmonized type
C standard yet only using EN 954-1 for the control circuits?
Related: If your machine is in the scope of a specific harmonized standard, do
you have to use it, rather than generics?
[Surely yes, but where is this stated?]
A few possible scenarios:
1) Undated reference to ISO 13849-1. (Many EN standards have a CEN cover but
the main text is ISO and only mentions ISO standards.) Surely this has to be
taken to refer to the latest edition, currently SECOND edition, 2006, upon
which the EN edition is based.
2) Dated reference to ISO 13849-1 (1999)? [1999 was the FIRST ISO edition,
which is pretty much just EN 954-1.]
3) Dated reference to ISO 13849-1 (2006) or EN ISO 13849-1 (2006, 2008 or
AC:2009)?
Some examples:
Undated reference to ISO 13849:
EN ISO 13850 (2006) [just in a note]
EN 60204-1 (2006)
EN 61496-1
(EN 848? - unconfirmed)
Dated reference to ISO 13849-1 (2006):
Committee version of EN ISO 10218-1 (robots)
Presumably there will be more examples over the next two years or so.
PS: Sometimes there is a conversion table from ISO/IEC to EN/HD in an appendix.
For example, Annex ZA in EN 60204-1 (a Cenelec standard). Sometimes not - EN
ISO 13850.
My tentative answer:
- Best practice always to use EN ISO 13849-1.
- If the type C standard calls out a specific "performance level", must use EN
ISO 13849-1 (2008 or later).
- If type C standard says something like, "Requirements for safety-related
functions can be found in ISO 13849-1", can use EN 954-1 as long as it remains
a harmonized standard.
I wonder if the Commission, CEN or Cenelec have, or will, issue any guidance, I
haven't seen any yet.
PS: Season's Greetings to you all. I finally had time to catch up on PSTC, but
now I'm taking a few days off!
Regards,
Glyn Garside
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