Industrial computers need to be designed with electromagnetic compatibility (EMC) considerations in mind. This includes designing EMC for the ventilation ports, the seams between the chassis, the connection between the circuit boards and the chassis, and the surface of the chassis.
EMC design for ventilation ports: While ventilation ports are crucial for cooling, they can also become pathways for electromagnetic waves. Therefore, when designing ventilation ports, it's important to consider their impact on electromagnetic radiation and induction, and to take appropriate shielding measures such as adding shield covers or metal mesh around the ports.
EMC design for seams between chassis: The seams between chassis are one of the main pathways for electromagnetic radiation and induction. To reduce electromagnetic leakage, metal gaskets and EMI shielding materials can be used to seal the seams. Additionally, it's important to ensure a good interface connection between the chassis and the circuit board to reduce electromagnetic leakage and interference.
EMC design for the connection between circuit boards and chassis: The ground connection between circuit boards and chassis is a critical part of EMC design as it determines the degree of electromagnetic leakage and induction. To ensure good grounding, multiple PCB layers, connectors, and conductive pads can be used. When designing connectors, EMC performance should also be considered, and connectors that meet EMC standards should be selected.
Special design for the surface of the chassis: The surface of the chassis can be directly exposed to the external environment, so it's important to consider its sensitivity to external electromagnetic radiation. Special surface treatment techniques such as electroplating and spraying can be used to reduce electromagnetic interference and leakage. Additionally, shield materials and electromagnetic absorption materials can be added to the chassis surface to reduce electromagnetic leakage and interference.
In summary, EMC design requires comprehensive consideration of all aspects to ensure that industrial computers meet EMC standards and do not cause electromagnetic interference to surrounding electronic devices and the environment, nor be affected by electromagnetic interference from surrounding electronic devices and the environment.
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