How can concentrator isolation devices improve immunity to interference?

Using isolation devices in concentrators can break ground loops, block common-mode noise, and improve system immunity. Selection and application considerations: For digital signal isolation, choose based on speed: low speed (<100kbps) can use optocouplers (e.g., TLP181), high speed (>1Mbps) can use magnetically coupled digital isolators (e.g., ADuM1401). For analog signal isolation, use isolation amplifiers (e.g., ADuM4190) or isolated ADCs (e.g., ADuM7701). The isolation voltage of the isolation device should meet system safety requirements (e.g., 3000Vrms). Power isolation is equally important; a separate isolated power supply module should be provided for the isolation side. During layout, the isolation device should be connected across the PCB's isolation strip, completely separating the primary and secondary circuits. The width of the isolation strip must meet safety creepage distance requirements (e.g., 8mm/300V). By using isolation appropriately, the effects of ground potential difference and common-mode noise can be minimized.