Mark,
Welcome to the group. There are a few of us here who work with
"combination" electrical and laser systems such as yourself. I didn't see
any replies from any of the other usual suspects, so I'll jump in.
Laser safety and power supply safety are USUALLY two separate issues. Most
power supplies must meet EN 60950 or a similar safety standard for Europe.
My experience is that most power supply manufacturers use EN 60950 as it
covers most typical environments where a power supply could be used. If you
have a power supply vendor chosen. Get a European Declaration of Conformity
from them and get a copy of their safety test report up to and including the
"Conditions of Acceptability".
What you then need to do is design your system so that the Conditions of
Acceptability aren't violated. Essentially, you will need use the supply in
its intended usage environment, you will need to ground (or not ground) it
as specified and you will need to ensure that your enclosure works in
conjunction with the power supply enclosure to protect users from getting
harmed. This will be the heart of your product electrical safety design.
If your system is designed to meet a different standard (i.e. EN 61010-1 for
test and measurement). You can still use a EN 60950 compliant power supply,
as long as you don't violate its Conditions of Acceptability.
EN 60825-1 applies to accessible emissions from lasers and LED's. Power
supply manufacturers do not design or test their power supplies to this
standard.
As an example, I'll use one of our typical "combination" products.
1. We specifiy a power supply compliant to EN 60950 (Safety of Information
Technology Equipment).
2. We design our enclosure, circuitboards ... to meet EN 61010-1 (Safety of
Test and Measurement Equipment) and we don't violate the power supply's
Conditions of Acceptability.
3. We then go through the calculations for accessible laser radiation in
accordance with EN 60825-1. (The power supply may factor into this, because
we need to determine the worst case conditions which means that we have to
know the power supply's regulation specification so that we can determine a
worst case voltage/current output to the laser).
4 We then submit all of this information to a third party lab along with
the required test samples for evaluation to EN 61010-1.
5. Once the test report is back and any required changes have been made, we
write a Declaration of Conformity to EN 61010-1and EN 60825-1.
Again, without knowing what types of products your company makes, I can't
suggest the actual standards that you will need to use. I have given the
above as an example. If you have a good relationship with a test lab, a
talk with one of the safety engineers there may help you out. My guess is
that some of the other guys in the group will offer some other goodies that
will help you complete your puzzle.
Best regards,
Chris Maxwell
Design Engineer
NetTest
6 Rhoads Drive, Building 4
Utica,NY 13502
email: chris.maxw...@gnnettest.com
phone: 315-266-5128
fax: 315-797-8024
> -----Original Message-----
> From: Mark Schmidt [SMTP:mschm...@xrite.com]
> Sent: Tuesday, February 13, 2001 9:22 AM
> To: emc-p...@ieee.org
> Subject: IEC60825
>
>
> Hello everyone,
>
> I am new to laser regulation and was wondering if there is such a thing as
> your basic open frame power supply meeting the requirements of IEC60825? I
> need a + 15 Vdc output at approximately 100 Watts. I have not read the
> standard yet and don't know how it compares with IEC60950. Does such a
> thing
> exist or do I just qualify a supply that meets 60950 and then submit the
> system to 60825 or does 60825 apply to the laser only and not the system.
> The laser is a Class 3A Device. All advice is welcome.
>
> Thanks
>
> Mark
>
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