Reliable Connectivity for Modern HVAC Systems

Common Design Challenges

Design Challenges in Connected Control Systems

As climate control and monitoring systems become more connected, engineers must balance power delivery, signal integrity, and mechanical reliability—often in harsh or space-constrained environments. Choosing the right connector architecture early can help avoid performance and integration issues later in the design cycle

1. Designing an HMI or display? Explore FPC / FFC solutions

2. Need internal power distribution? Learn more about SignalBee / EnerBee

3. Connecting multiple PCBs? View FunctionMAX® board-to-board options

4. Linking sensors and actuators? See I/O connector solutions

5. Using removable memory or storage? Discover DM / KP Series

6. Adding wireless connectivity? Review FL Series connectors

Not seeing your design question here? Talk to our team >

Design Resources

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Popular Connector Solutions for Smart, Connected Systems

Find application-focused resources to help guide connector selection for common commercial climate control and cooling systems:

View HVAC Connector Resources > Connector solutions for indoor and outdoor HVAC equipment, including control boards, sensor interfaces, power distribution, and communication modules.

Explore Chiller Design Resources > Recommended connectors for chillers and cooling units, supporting reliable power and signal connections in high-duty-cycle environments.

See Thermostat Design Resources > Connector options for compact control interfaces, displays, and communication modules used in smart thermostats and system controllers.

View Cold Storage Container Resources > Rugged connector solutions for mobile cooling equipment, designed to withstand vibration, temperature extremes, and frequent maintenance cycles.

Explore Data Center Cooling Applications > Connector solutions for data center chillers, cooling controls, sensors, and monitoring systems supporting critical infrastructure.

What types of connectors are used in HVAC systems? +

HVAC systems use wire-to-board, board-to-board, FPC/FFC, power, signal, and industrial communication connectors. These support connections between control boards, sensors, displays, fan assemblies, power modules, and communication interfaces. Hirose offers solutions including the DF51, DF60, FX31, FH, and ix Industrial™ Series.

Where are connectors used in HVAC and refrigeration equipment? +

Connectors are used throughout HVAC and refrigeration equipment, including thermostats, control boards, temperature and pressure sensors, fan and motor control assemblies, power distribution modules, displays, and network interfaces. Depending on the subsystem, they carry power, control signals, or data between components.

How do I choose the right connector for my HVAC application? +

Start with the electrical requirements, including current, voltage, and signal type. Then consider available space, operating temperature, vibration, moisture exposure, and assembly requirements. Hirose offers compact, high-current, secure-locking, waterproof, and floating connector options to address different HVAC design needs.

What connector features help prevent disconnection from vibration? +

Positive-locking and secure-latching mechanisms help prevent accidental unmating in equipment exposed to vibration. Contact design, cable retention, and proper mounting also contribute to connection reliability. Hirose offers secure-locking wire-to-board connector families, including DF51B and DF63W, for applications where vibration resistance is important.

What connectors are used in commercial chillers and data center cooling systems? +

Commercial chillers and data center cooling systems use connectors for power distribution, control boards, pumps, fan assemblies, sensors, monitoring equipment, and industrial communication. Hirose offers FX31 floating board-to-board connectors for high-current power connections, DF60 and DF22 Series power connectors, and ix Industrial™ connectors for industrial Ethernet interfaces.

What connectors are used for smart thermostats, displays, and control boards? +

Smart thermostats and HVAC controllers use compact connectors for displays, touch interfaces, sensors, wireless modules, and control PCBs. Hirose offers FH Series FPC/FFC connectors for display connections, DF51 Series wire-to-board connectors for internal wiring, and U.FL Series micro-coaxial connectors for RF interfaces.

What connectors are suitable for refrigerated trailers and cold storage equipment? +

Refrigerated trailers and cold storage equipment require connectors selected for vibration, temperature changes, moisture exposure, and secure electrical contact. Hirose offers DF62W and DF63W Series water-resistant or waterproof connector options, depending on the series and configuration, along with high-current power and secure-locking signal connectors for refrigeration control and monitoring assemblies.

When should waterproof connectors be used in HVAC systems? +

Waterproof connectors should be considered for HVAC equipment exposed to rain, condensation, washdown, or other sources of moisture. Applications may include outdoor units, cooling equipment, and exposed sensor connections. Hirose offers IP-rated connector options, including the DF63W Series, to help protect electrical connections. Engineers should verify the required IP rating, operating conditions, and sealing requirements for each application.

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