Hi, 

We are producing a product for use in marine navigation. It is an 
intentional transmitter, so we are getting it type-approved by a notified 
body, the DRA in the UK. DRA has told us ETS300339 is the relevant 
product standard. ETS300339 calls for most of the usual emissions and 
immunity tests such as EN55022 and IEC1000-4-x, but it also calls for 
testing to ISO7637, an automotive spike and surge immunity standard. 

The system will ship with a choice of printers that are DC-powered at 12 
to 24 volts and that are purchased CE-marked from a reputable printer 
manufacturer. 

My question is: do these off-the-shelf printers have to comply with 
ISO7637 because they are part of this larger system, or can they stand 
alone with their current CE marking? The printers were not designed for 
these severe spikes and surges and will likely fail. 

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John Lovell
Director of Quality
Trimble Navigation Ltd. 
+408-481-2012 Voice
+408-481-8194 FAX
[email protected]
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