EMC – The HF Shielding of Enclosures
Electromagnetic compatibility (EMC) is the ability of an electronic device to work properly in an electronic environment without causing inadmissible interference. ( DIN VDE 0870 )
RTP - Rutty Tool-Less Plastics offers plastic enclosures with inner shielding. Thus, the customer is able to construct and build HF (high frequency) shielded enclosures conforming to european EMC standards.
The flat plastic is coated with Isolex R-65, a conducting paint, which is UL listed. The use of these types of surface coatings is well known because of their high damping coefficient and their high electromagnetic absorption over a wide frequency range. Discontinuities of the enclosure (bending points etc) may be touched up by hand if required. Every cut-out for switches, cables or air slots influences the shielding characteristics of the final product. The HF shield factor is dependent on the emissive power and the frequency range of the built in electronics. In addition, the effect of all perforations on the overall HF shielding cannot always be determined. This is also true for the influence of built in electronics and for the final working environment of the enclosure. Therefore no guarantee can be given by RTP - Rutty Tool-Less Plastics offers for the shielding quality of the end product.
Optimum HF shielding of an enclosure can only be achieved by close cooperation between the electronic engineer and the enclosure manufacturer during the construction phase.
RTP - Rutty Tool-Less Plastics offers gladly supports its customers with its technical experience in producing HF shielded enclosures. The final testing procedure and the EMC approval, however, remain strictly the responsibility of each customer.
ISOLEX R-65 RFI/EMI SHIELDING COATING
R-65 is used as an RFI/EMI shielding and antistatic coating for plastic substrates. It will yield a surface resistance of 0.5 ohms/square or less, at dry film builds of 38-50 microns, as tested according to ASTM D257. R-65 is a mar and burnish resistant finish that possesses high electromagnetic absorptive properties over a broad frequency range.
