How to select the shielding component for the HMI (Human Machine Interface)?

Selecting appropriate shielding components for HMI interfaces requires comprehensive consideration of the interface type, installation method, and shielding effectiveness requirements. Interface shielding components mainly include connectors with shielded shells, shielded tail clips, conductive gaskets, and shielding covers. For standard communication interfaces such as RJ45, USB, and HDMI, shielded connectors with metal shells should be preferred. When selecting, it's necessary to confirm the mating method between the connector shell and the device panel opening to ensure 360-degree low-impedance connection after installation. Common types include snap-fit, screw-fixed, and crimped connections. For unshielded connectors or situations requiring cable shielding, shielded tail clips are needed to unfold and clamp the cable shielding between the tail clip and the device housing, achieving 360-degree grounding.

If gaps or unevenness exist between the connector and the device housing, conductive gaskets, such as conductive rubber, conductive foam, or metal spring rings, may need to be added to fill the gaps and ensure electrical continuity. For onboard interface chips or areas, local shielding covers may be required. These covers should be made of materials that are easy to solder and disassemble and have a good grounding design. Environmental factors, such as waterproofing and corrosion resistance requirements, must also be considered when selecting a shielding solution. Eintech offers a wide range of interface shielding components and solutions, and can recommend the most suitable shielding model and installation scheme based on specific HMI interface design needs.