[En-Nut-Discussion] Nut don't work anymore

Harald Kipp harald.kipp at egnite.de
Thu Jul 6 09:41:34 CEST 2006

Hi Thorsten,

At 20:34 05.07.2006 +0200, you wrote:
> > because of improper handling of the bare boards. The Ethernut 2
> > boards seem to be much more robust.
>Do you think I can use the Ethernut 2.1 in an industrial environment with
>many big production machines around like robots and welding machines?

You need to protect anything attached to the expansion port
against electrical discharge. The RS232, power supply and
Ethernet connectors are very well protected. Not everybody
is satisfied with the RS485 protection, because these cables
may be several miles/kilometers long.

Build into a such a case (aluminium, but not EMI sealed)

it conforms to
EN 61000-4-2
EN 61000-4-3
EN 61000-4-4
EN 61000-4-5
EN 61000-4-6
EN 61000-4-11
EN 61131-2
CISPR 16-1
for both, Class A (industrial) and Class B (residential/commercial).

As Curtis pointed out, in the EU the manufacturer puts on the CE mark
and confirms conformity. egnite contracted an independent lab to do
the certification and takes care, that only materials with UL marks
are used. Newer Ethernut 2 board do have a UL mark on the PCB. Of
course all currently sold boards are lead free.

In case anyone wants to trouble you because of a "non-conformant
hobbyist board", ask egnite for assistance. Note, that CE conformance
had been granted for our reference housing only. If you use a
different one, you have to test specifically that one. No need
to say, that CE is valid in the EU only. But based on our test
results you can be almost sure, that the board will conform to
similar regulations in other countries.

You might get in trouble with temperature. Many parts on the board
are industrial types (-40 to +85°C or -40 to 185°F) but some are
commercial only (0 to +70°C or +32 to +158°F). As customer demands
grow, egnite plans to offer a pure industrial version.

I try to avoid this kind of marketing babble in the mailing list.
However, even if you manufacture your own boards and follow the
reference CAD files (you are explicitly allowed to do so), then
you can be quite sure to end up with a professional product.


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