How can the concentrator's data acquisition circuit be kept away from interference sources?

The acquisition circuitry (ADC, reference, signal conditioning) of the concentrator is extremely sensitive to noise and must be placed away from various interference sources. Interference sources include: transformers and MOSFETs in the switching power supply, relay coils, clock regions of digital chips, carrier coupling circuits, and power input terminals. During PCB layout, the acquisition circuitry should be centrally located in a quiet corner of the board, maintaining a distance of at least 30mm from the aforementioned interference sources. If space is limited, a grounded shield or metal partition can be installed between the acquisition area and the interference sources. The power supply for the acquisition circuitry should be independently obtained from the input front end of the power module and filtered by LC (PBZ1608E600Z0T + capacitor) and regulated by an LDO. Signal traces should avoid crossing above or below interference sources. Structurally, the acquisition circuitry can be fabricated as an independent daughterboard, connected to the main board via connectors for physical isolation. By keeping it away from interference sources and combining shielding and filtering, the noise level of the acquisition circuitry's environment can be reduced by 30dB.