EMC of Vehicle Sub Assemblies - "e" Mark
Some Sub-Assemblies Require e-Mark
Some of the automotive "extras", such as car stereos, alarm systems, power sunroofs, mobile phone adapters, navigational systems and high-mounted stop lamps, are also under scrutiny for EMC (electromagnetic compatibility).
Compliance with the Automotive EMC Directive (95/54/EC) is indicated by the "e" mark, which is fitted to the sub-assemblies. It allows component manufacturers to demonstrate to existing and potential customers that their product meets the applicable automotive EMC requirements.
It can also simplify the certification process for the manufacturer significantly, i.e. if all relevant electronic and electric systems have been individually approved, no further testing is required on the vehicle. Additionally, components which are covered by the Automotive EMC Directive and comply with CD 89/336/EEC may be marked with the CE Marking.
The framework directive 70/156/EEC defines "vehicles" as follows:
"any motor vehicle intended for use on the road, being complete or incomplete, having at least 4 wheels and a maximum design speed exceeding 25 km/h, and its trailers, with the exception of vehicles which run on rails and of agricultural and forestry tractors and all mobile machinery." This includes passenger cars, trucks, vans, coaches, caravans and motor caravans (RV). Motorcycles are covered by the frame directive 92/61/EEC.
"Components", in the sense of the directive, are electrical and electronic sub-assemblies intended to be part of a vehicle, together with any associated connections and wiring, which perform specialized functions.
Any components that are involved in the direct control of vehicles, like alternators, ignition coils and starters, will normally receive type-approval in conjunction with a vehicle, and do therefore not require separate approval. The KBA (Kraftfahrbundesamt) as executive organ of the German Ministry of Transport has published a comprehensive list of those components that should be "e" marked. The list has been created in collaboration with major component manufacturers and technical service providers, including TÜV Rheinland.
The ESA-List gives a brief overview of some of these components and their applicable tests.