First of all, the main documents you need to know:
Those documents form the basis of your work. Also, they define if your device is subject to the directive or not. Depending on the case, you could also be subject to the R&TTE Directive and RoHs Directive).
The Annex I of both documents informs us on the essentials requirements to meet. Mainly, it says that your product must be safe for humans, pets and property and that it should not be impacted by the electromagnetic emissions of other nearby devices nor it should impact them with its own emissions.
What's really interesting lies in the Annex II of the first document and in Annex IV of the second document. These parts defines the conformity assessment procedure you'll have to follow.
There are 8 procedures (called modules) of conformity assessment:
- internal production control (module A);
- CE type-examination (module B);
- conformity to type (module C);
- production quality assurance (module D);
- product quality assurance (module E);
- product verification (module F);
- unit verification (module G);
- full quality assurance (module H).
In our case, the one to follow is called Internal Production Control. Basically, what you have to do is write the technical documentation. This document should be made of those parts:
- a general description of the electrical equipment,
- conceptual design and manufacturing drawings and schemes of components, sub-assemblies, circuits, etc.,
- descriptions and explanations necessary for the understanding of said drawings and schemes and the operation of the electrical equipment,
- a list of the standards applied in full or in part, and descriptions of the solutions adopted to satisfy the safety aspects of this Directive where standards have not been applied,
- results of design calculations made, examinations carried out, etc.,
- test reports.
We learn what we have to do in order to respect the directives. The main constraint here will be showing that you have indeed accessed the harmonised standards. This can cost quite a hefty sum of money. However Afnor (the French certification organism) provides subscription to their database, which can be cost effective compared to buying individual standards). Your local certification organism should have a similar offer.
The harmonised standards list to be followed is available here:
This document will then have to be kept for up to ten years after the last product manufactured was sold.
Doing this will allow you to affix the CE marking and provide a certificate of conformity to your customer.
Even if this is a lighter method for CE certification, it still involves a bit of work. However, this is something that should be done anyway (if just to make sure your product will perform well and as expected in all conditions).
There is a European Union website that shows all the currents harmonized standards and all the different Directives your product may be subject to:
TL;DR: At least two directives applies, one related to EMC, the other to Low Voltage Devices. The procedure to follow is called Internal Production Control. To comply, one has to draw up a technical documentation whose main part is the harmonised standard list followed is added.