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Episode Description:
The industry is shifting and BACnet Secure Connect (BACnet SC) is becoming the new standard for protecting BAS networks from cyber threats. This episode walks you through what it is, why it matters, and how to prepare for the transition while keeping operations running smoothly.
We’ll explore:
• How BACnet SC strengthens cybersecurity for BAS networks
• The key differences from BACnet over IP
• Practical considerations before implementation
• Real-world migration strategies and lessons learned
• The future of BACnet SC in smart buildings
Discover how BACnet SC can help secure your BAS network and set the foundation for future-ready building operations.
Click here to download or listen to this episode now.
Podcast Video
The Definitive Guide to BACnet Secure Connect (BACnet SC)
Building automation systems are increasingly connected to IT networks. This brings new possibilities but also new cybersecurity risks. BACnet Secure Connect (BACnet SC) is designed to address these challenges while improving performance and compatibility.
What is BACnet Secure Connect?
BACnet SC is an update to the BACnet protocol that uses modern IT security standards, including TLS 1.3, to encrypt data. It uses web technologies such as HTTPS and WebSockets to ensure secure, reliable communication. BACnet SC can be integrated into existing BACnet IP systems, allowing upgrades without replacing all devices.
Why BACnet SC Was Developed
Three main drivers led to its creation:
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Cybersecurity concerns: Traditional BACnet over IP is vulnerable to interception, especially across multiple networks.
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IT and OT convergence: Building automation systems are becoming IT assets, requiring alignment with IT security standards.
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Need for secure communication: Encrypted, authenticated communication is essential to protect building operations.
Key Differences from BACnet over IP
BACnet over IP relies on broadcasts and VPNs for security. BACnet SC eliminates broadcasts, using hubs to route traffic securely. It encrypts communications using TLS 1.3, reducing IT complexity and improving performance in large-scale systems.
Components of BACnet SC
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Hubs: Central points for communication and authentication, typically software-based.
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Nodes: Devices such as controllers, sensors, and workstations that connect to hubs.
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TLS Certificates: Provide encryption and authenticate devices.
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WebSockets: Enable persistent, secure, two-way communication.
Cybersecurity Advantages
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End-to-end encryption prevents data interception.
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Device authentication ensures only trusted devices join the network.
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Modern protocols improve reliability.
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Compatible with existing BACnet IP devices.
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Works within a defense-in-depth strategy alongside firewalls and intrusion detection.
Implementation Considerations
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Collaboration with IT: BAS and IT teams must align early in the project.
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Certificate management: Requires planning and a public key infrastructure.
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Redundancy: Failover hubs prevent single points of failure.
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Compatibility: Ensure both new and existing devices integrate properly.
Migration Strategies
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Start with phased implementation, securing high-risk devices first.
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Use BACnet routers and gateways to connect SC networks with IP and MSTP devices.
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Prepare for potential complexity, cost, and performance considerations.
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Plan around vendor adoption rates and hardware availability.
Case Study Example
A large commercial building with outdated BACnet IP controllers faced IT security restrictions. By creating a hybrid network of BACnet SC, IP, and MSTP devices, the BAS team met IT security requirements while keeping existing equipment online. This resulted in enhanced security and simplified system management.
Best Practices
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Involve IT early in planning.
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Always use TLS encryption.
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Manage certificates for both devices and user workstations.
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Maintain firewalls and VLANs during transitions.
Looking Ahead
BACnet SC is expected to see rapid adoption and closer integration with cloud and IoT platforms. Engineers and facility managers will need ongoing cybersecurity training to maintain secure systems. Industry programs are supporting OEM adoption, ensuring broader availability in the coming years.
Final Takeaways
BACnet Secure Connect is a secure, future-ready protocol that aligns IT and operational technology requirements. It supports regulatory compliance and delivers safer, smarter building automation.
For a deeper discussion and insights from the field, listen to this episode on the Smart Buildings Academy podcast.
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