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Multi‑Channel Relay Output RS485 HVAC PCB Controller Board

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Shenzhen Xiangfan Electronics Technology Co., Ltd.

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Multi‑Channel Relay Output RS485 HVAC PCB Controller Board

Place of Origin : China

AC/EC Fresh Air System Compatibility : Designed for fresh air ventilation and HVAC applications using AC or EC motor systems.

Payment Terms : T/T

Delivery Time : 2-3 weeks

Supply Ability : 100000pcs

MOQ : 500

Multi-Function Control Platform : Integrates motor control, relay outputs, sensor interfaces and communication functions on one mainboard.

Brand Name : OEM

Dual RS485 Communication Ports : Provides reliable communication interfaces for system integration, monitoring and control.

Price : US$25/pcs

Flexible I/O Configuration : Control interfaces and functional modules can be customized according to different ventilation system requirements.

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Product Overview:

Our HVAC main control PCB boards are developed for fresh air ventilation systems, dehumidifiers, energy recovery ventilators and air handling units. With multi‑channel relay switching outputs, the boards drive compressors, fans, electric heaters, UV sterilizing lamps, ion generators and other actuators. Multiple external sensor ports support NTC, temperature & humidity, PM2.5 and CO₂ monitoring. RS485 communication enables remote monitoring and system linkage.

Built‑in hardware protection circuits include high/low pressure protection for compressor safety. The whole series complies with EMC test standards, multiple dimension options for flexible cabinet installation, ideal for OEM & ODM HVAC equipment manufacturers.

Key Features:

✔ Multi‑channel relay output for compressors, EC fans, electric heaters, UV lamps, ion generators and water valves
✔ Reserved RS485 communication interface for remote control & system interconnection
✔ Multiple external sensor terminals: NTC, Temperature & Humidity, PM2.5, CO₂ sensors supported
✔ Built‑in high / low pressure protection for compressor safe operation
✔ Support 0‑10V fan signal output for EC fan speed regulation

Multi‑Channel Relay Output RS485 HVAC PCB Controller Board

Multi‑Channel Relay Output RS485 HVAC PCB Controller Board Images

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