Hello Bostjan,
My recommendation is to purchase precision optical test equipment from a
manufacturer that offers traceable calibration services. In my opinion, the
best option is to have the manufacturer perform the traceable calibration if
they offer the service.
There are few independent lab
Piotr,
You don't have to be an expert in 60950-1 to interpret the TUV report. You
only need to know which section of 60950-1 defines the requirements and tests
for SELV and then see that those clauses are marked as passed in the TUV report
or otherwise Not Applicable if the manufacturer does n
EN 60204-1 for machinery defines PELV for itself and does not even use SELV.
-Dave
-Original Message-
From: John Woodgate [mailto:j...@woodjohn.uk]
Sent: Thursday, November 23, 2017 2:00 AM
To: EMC-PSTC@LISTSERV.IEEE.ORG
Subject: Re: [PSES] Safe powering 12V doorlock
There is no definit
Hi Bostjan,
Previously I looked in definitions list in alphabetic order and there is
no SECONDARY CIRCUIT (in Polish adoption of not translated standard).
But looking in not alphabetic I found it and I see my 12V is the
SECONDARY CIRCUIT.
If the sentence I cited previously refers to products
Hi Piotr,
This refers to products supplied by secondary circuit. Power supply is supplied
by AC mains therefore primary circuit. For OVC II we always apply 5B. You can
trust me on this since we approve many power supplies.
Best regards,
Bostjan
-Original Message-
From: Piotr Galka [m
Hi Bostjan,
In 5.2.2 there is the sentence: "However, for a SECONDARY CIRCUIT that
is neither connected to protective earth nor provided with a protective
screen in accordance with 2.6.1 e), Table 5C shall be used."
I understand that, that way it depends on output which table to select.
In De
Hi Rich,
Thanks for confirming that isolation in doorlock can be only functional.
This eliminates me one conception that 12V can be ELV, but second
isolation is in doorlock.
So now, as I'm sure that 12V have to be SELV/PELV I have to ask them if
it is.
I know that for other supplies they speci
Richard,
In EN50491-3 (HBES & BACS safety) ELV, SELV, PELV are defined I think
the same way as you show. But except definition there are also Notes. I
have only Polish translation so may be not precise writing what was in
original.
Under SELV definition there is Note 1: SELV circuit is separat
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