Concept
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 factors such as the type and length of the transmission medium, network topology, and the number of nodes.
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.
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.
Components associated with legacy communication protocols may include, but are not limited to, Andover Continuum Infilink or b-Link repeaters, physical layer repeaters, LON terminators, RS-485 termination resistors, bias resistors, and external power supplies.
Legacy devices are not compatible with the signaling used by the Twisted Pair Adapter and can interfere with communication, resulting in communication issues or degraded network performance.
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.
Twisted Pair Adapter is designed for scalability, allowing you to connect up to 64 nodes (adapters) across the twisted pair network.
The adapter supports a total connected cable length of up to 1200 m (3900 ft), including all stubs.
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.
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.
The operating modes are controlled by the M/T slide switch on the front of the adapter:
Master – For connection to an automation server (exactly one Master is required per twisted pair network).
Terminal – For connection to a SpaceLogic BACnet/IP controller.
For more information, see Twisted Pair Adapter Operating Modes .
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 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 .
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.
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