How to ensure EMC during full-load data collection by the concentrator?

When the concentrator is running at full load, the internal power devices experience maximum heat generation and current stress, and its EMC performance may differ from that under light load. Ensuring EMC performance under full load requires targeted design. The rated current of power filtering components (such as the common-mode inductor CMZ1211-501T) must be greater than the full-load current, and performance degradation due to temperature rise should be considered; typically, a current margin of 50% or more should be selected. Ripple and noise of the switching power supply may increase under full load; it is necessary to ensure that the ESR of the output filter capacitor remains sufficiently low at high temperatures, and multiple ceramic capacitors can be connected in parallel. PCB layout must consider the impact of heat generation from high-current paths on adjacent sensitive circuits, and thermal insulation or physical isolation should be added if necessary. EMC testing must be performed under full load conditions. Simultaneously, the metering accuracy under full load should be monitored to ensure it still meets requirements. Through design and testing verification, ensure that the concentrator's EMC performance fully meets standards at 100% load.