DeviceNet vs. Ethernet: What’s the Difference and Which Should You Choose?

In industrial automation, choosing the right communication protocol is crucial. Among the popular options, DeviceNet and Ethernet/IP are often compared. Both are based on the Common Industrial Protocol (CIP), but they operate on very different physical layers and serve different use cases. Let’s explore their key differences and where each works best.

1. Understanding the Basics: What Are DeviceNet and Ethernet?

To begin with, it's important to know what these two protocols are.

DeviceNet is built on CAN (Controller Area Network) technology. It’s designed for communication between industrial devices like sensors, actuators, and controllers in a linear network topology. It supports both data and DC power over the same cable, making it efficient for many low-level device networks.

Ethernet/IP, on the other hand, uses standard Ethernet technology to provide faster data communication. It’s better suited for complex, high-speed applications and allows integration with enterprise-level networks.

2. Speed vs. Simplicity: Performance and Complexity

Moving forward, let’s look at how they compare in terms of performance and setup.

Ethernet/IP is faster, supporting speeds up to 100 Mbps or more. This makes it ideal for large systems requiring high data throughput. However, this speed comes with a cost—it needs more powerful hardware, switches, and a more complex network infrastructure.

In contrast, DeviceNet operates at lower speeds (up to 500 kbps), but it's much simpler to install, maintain, and troubleshoot. Its bit-wise arbitration system allows multiple devices to send data at the same time without conflict, making full use of the bus bandwidth.

3. DeviceNet Advantages: Power and Efficiency

Let’s now consider why DeviceNet remains relevant despite being older.

DeviceNet offers several unique benefits, especially in industrial settings:

• DC power over the communication cable, reducing the need for extra wiring

• 100% bus utilization thanks to CAN arbitration

• Cost-effective and reliable components

• Ideal for simple devices like proximity sensors and push buttons

These features make DeviceNet a solid choice for smaller or fixed-topology systems.

4. Ethernet/IP Benefits: Scalability and Integration

Now let’s shift our focus to Ethernet/IP and its strengths.

The main advantage of Ethernet/IP is speed and scalability. It allows integration with IT systems and supports real-time communication across multiple network layers. Ethernet/IP is better for:

• High-performance motion control

• Data-heavy applications

• Network diagnostics and remote monitoring

However, its real-world speed often depends on device CPU power, not just the network infrastructure.

5. Long-Term Outlook: Is DeviceNet Still Future-Proof?

This leads to an important question—is DeviceNet still viable in the long run?

While DeviceNet is still widely used, many manufacturers are shifting towards Ethernet-based protocols. The growing focus on Industrial Internet of Things (IIoT) and smart factories means Ethernet/IP will likely gain more support. Some vendors may eventually phase out DeviceNet in favor of Ethernet solutions.

That said, in legacy systems or simple device networks, DeviceNet continues to offer reliability and ease of use.

Conclusion: Choosing the Right Protocol for Your Application

In summary, choose DeviceNet if your system needs low-speed communication, simple wiring, and cost-effective installation. On the other hand, opt for Ethernet/IP if you need higher speed, more advanced networking, and integration with IT systems.

Both have their place in the industrial world—your decision should depend on the scale, complexity, and long-term goals of your automation project.

If you're unsure which communication protocol suits your industrial setup best, Amissiontech can help. We specialize in custom industrial connectors and cable harness solutions, supporting both DeviceNet and Ethernet/IP applications. Let’s build the right solution for your needs—Contact Amissiontech today.