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Multi-Channel Relay Output HVAC main control PCB boards with Dual RS485 Communication Ports for AC/EC Fresh Air Systems

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Multi-Channel Relay Output HVAC main control PCB boards with Dual RS485 Communication Ports for AC/EC Fresh Air Systems

Place of Origin : China

Motor Compatibility : AC/EC systems

Payment Terms : T/T

Fan Signal Output : 0-10V

Delivery Time : 2-3 weeks

Brand Name : OEM

Communication Ports : Dual RS485

Supply Ability : 100000pcs

Protection Circuit : High/low pressure

MOQ : 500

Relay Outputs : Multi-channel

Price : US$25/pcs

Sensor Ports : NTC, Temperature & Humidity, PM2.5, CO₂

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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 HVAC main control PCB boards with Dual RS485 Communication Ports for AC/EC Fresh Air Systems

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Multi-Channel Relay Output HVAC main control PCB boards with Dual RS485 Communication Ports for AC/EC Fresh Air Systems Images

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Multi-Channel Relay Output HVAC main control PCB boards with Dual RS485 Communication Ports for AC/EC Fresh Air Systems

Multi-Channel Relay Output HVAC main control PCB boards with Dual RS485 Communication Ports for AC/EC Fresh Air Systems

Dual RS485 HVAC PCB boards

AC/EC HVAC PCB boards

Multi-Channel HVAC PCB boards

Multi-Channel Relay Output HVAC main control PCB boards with Dual RS485 Communication Ports for AC/EC Fresh Air Systems Images