As building systems become smarter and more connected, one question keeps surfacing: how can we efficiently connect more devices, across larger spaces, without adding network complexity or cost?
This is where 10BASE-T1L Ethernet fundamentally changes the way we think about building network design.
Long-Reach Ethernet, Designed for Buildings
Traditional Ethernet (such as 100BASE-T) typically maxes out at 100 meters per cable run and requires Category 5e or better cabling. For large commercial buildings, these limitations have shaped decades of network design — centralized telecom rooms every 100 meters, structured cabling bundles, and rigid network topologies requiring Ethernet switches at the center of each floor or zone.
10BASE-T1L rewrites those rules.
With 10 Mbps full-duplex communication over a single twisted pair cable up to 1000 meters, 10BASE-T1L allows you to reach deep into a building — from the core network all the way to remote sensors, actuators, and controllers — without additional switches or repeaters in between.
New Topologies for Smarter Buildings
In traditional Ethernet designs, like a “Star” topology, every device connects back to a central switch. This method has been reliable but inefficient for distributed control systems like HVAC and lighting, which often stretch across long corridors, multiple wings, or remote mechanical spaces.
With 10BASE-T1L, you can think differently:
1. Point-to-Point Topology
A simple direct connection between two Ethernet devices (such as a controller and a remote I/O module or sensor). Ideal for long-run devices up to 1 km away without a switch in between. Reduces network complexity and cost.
2. Linear or “Daisy-Chain” Topologies
Instead of pulling individual home-run cables to each device, a single 10BASE-T1L line can run through multiple control panels or zones. This reduces cabling volume, installation time, and material costs — ideal for retrofits or expansive facilities.
3. Extended Reach for Flexible Device Placement
With 10BASE-T1L supporting cable runs up to 1000 meters (1 km), system designers gain new freedom to place controllers and devices exactly where they make the most sense — not just where the network allows.
Rethinking Network Rooms and Infrastructure
Because 10BASE-T1L extends IP reach like never before, network designers can consolidate the number of needed switches into fewer telecom or control rooms. Imagine covering an entire floor or even a small building from a single network closet.
Plus, since 10BASE-T1L uses only a single twisted pair of wires, it can run over existing 18–22 AWG control wiring, significantly increasing retrofit opportunities without hefty integration costs.
With unique benefits like these, designers can now:
- Simplify network management by eliminating intermediate network switches and control enclosures.
- Extend Ethernet reach to devices in mechanical rooms, risers, or remote wings.
- Lower installation and maintenance costs by reusing existing cable infrastructure.
- Maintain a consistent 10 Mbps data rate regardless of cable length (up to 1 km).
- Reduce energy and space use in IT closets.
10BASE-T1L: Bridging IT and OT Seamlessly
One of the biggest values of T1L is that it brings Ethernet to the edge. Devices that used to rely on proprietary fieldbus protocols like RS-485 can now communicate directly on the same IP network as building management systems and analytics platforms.
That means fewer protocol gateways, easier device discovery, and more accessible real-time data — all using a network topology that matches the physical layout of your building.
Designing with 10BASE-T1L in Mind
When planning your next building system:
- Think in zones, not stars. Design network layouts that follow how your systems and spaces are actually arranged.
- Capitalize on long-reach Single Pair Ethernet to connect to more remote building areas without the hassle of extra switches.
- Leverage T1L’s Ethernet compatibility to keep everything — from edge sensors to cloud dashboards — on a unified, secure IP backbone.
Conclusion
10BASE-T1L isn’t just a faster cable — it’s a new design mindset for connected buildings. Its 1000-meter reach, simple twisted-pair wiring, and Ethernet compatibility give building designers and system integrators the freedom to build smarter, more efficient network architectures that align with how buildings are actually used.
At Smart Controls, we are partnering with ASI Controls to bring 10BASE-T1L into our next generation of building automation products — helping building owners and operators unlock the full potential of Single Pair Ethernet.
Want to see how 10BASE-T1L could simplify your next building automation project? Stay tuned for updates on our upcoming product line — or contact Smart Controls to explore how we can help you design for the future of connected buildings.