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Concept

Concept


Products: Twisted Pair Adapter
Functionalities: Hardware
Product version: 1.8, 1.9, 2.0, 2.1, 3.0, 3.1, 3.2, 3.3, 2022, 2023, 2024, 7.0, 7.1
12/18/2025

Ethernet over Twisted Pair Cable Network

Twisted Pair Adapter supports Ethernet over twisted pair cable networks.

The adapter supports Ethernet connectivity at 10/100 Mbit/s. Actual data throughput may vary depending on the type and length of the transmission medium.

The device has an Ethernet 10/100BASE-TX port with RJ45 connector for connection to the SpaceLogic BACnet/IP controller or automation server and a 2-position removable screw terminal block for polarity insensitive connection to the twisted pair cable network.

The adapter does not supply power to the twisted pair network.

Retrofit projects

Twisted Pair Adapter enables seamless integration of the IP-based SpaceLogic controllers into networks originally designed for serial or free topology protocols.

By reusing existing twisted pair cabling, the adapter minimizes the need for new wiring and avoids major infrastructure changes, making retrofit projects more efficient and cost-effective.

 
action_zoom_plus_stroke Example of transition from serial communication to Ethernet/IP over twisted pair network
Figure: Example of transition from serial communication to Ethernet/IP over twisted pair network
Support of free topology networks

Twisted Pair Adapter supports free topology networks, allowing twisted pair cable networks to be arranged in bus, star, ring (loop), daisy-chain, or hybrid (mixed) configurations.

 
action_zoom_plus_stroke Free topology networks supported
Figure: Free topology networks supported
Scalable network

Twisted Pair Adapter is designed for scalability, allowing you to connect up to 64 nodes (adapters) on a single twisted pair cable network.

The adapter supports cable lengths up to 1200 m (3900 ft).

L2 switching for IP network communication

Twisted Pair Adapter features OSI Layer 2 (L2) switching, enabling efficient data forwarding within local networks using MAC addresses. Designed for plug-and-play operation, the adapter requires no configuration and integrates seamlessly into IP networks.

 
action_zoom_plus_stroke L2 switch functionality
Figure: L2 switch functionality
Self-recovering mesh network and multi-hop capability

Twisted Pair Adapter supports a self-recovering mesh network that automatically adapts to changes in network topology. The adapter's multi-hop capability extends the communication range.

Configurable operating mode

The operating modes are controlled by the M/T slide switch on the front of the adapter:

  • Master – For connection to an automation server (only one Master per network).

  • Terminal – For connection to a SpaceLogic BACnet/IP controller.

For more information, see Twisted Pair Adapter Operating Modes .

Polarity insensitive network connection

The adapter's interface to the twisted pair cable network is not only isolated but also polarity-insensitive, allowing for easy and error-resistant installation.

Twisted Pair Adapter Engineering Tool

Twisted Pair Adapter Engineering Tool is a standalone tool that allows monitoring of adapter status and link quality. The tool also enables firmware upgrades of connected adapters.

For more information, see Twisted Pair Adapter Engineering Tool Overview .

Support of IP-based protocols

As a protocol-agnostic device, the Twisted Pair Adapter supports various IP-based protocols, including BACnet/IP, and BACnet/SC (Secure Connect), used in the EcoStruxure BMS network.

See Also

  • Twisted Pair Adapter
  • Twisted Pair Adapter Operating Modes
  • Wiring
  • Wire Sizes and Lengths for the Twisted Pair Adapter
  • Communication Port Wiring
  • Wiring the Screw Terminals on a Twisted Pair Adapter for Connection to a Twisted Pair Cable Network
  • Twisted Pair Adapter Engineering Tool Overview