Factories today commonly use Ethernet networks for supervisory control and station management, but still rely on legacy fieldbus solutions to communicate with field instrumentation. Such legacy protocols need to be replaced and modernized with low-cost, single unshielded-pair Ethernet solutions which will allow factories to run data over Ethernet seamlessly from the cloud to the edge.
The IEEE 802.3cg standard provides a specification for the technology to overcome the gap in industrial Ethernet systems, offering low-cost communication to field devices at a data rate of 10 Mbits/s using two physical layers:
Now onsemi has introduced dedicated IEEE 802.3cg-compliant components which provide a robust, off-the-shelf solution for unshielded-pair Ethernet.
The NCN26000 is an Ethernet transceiver (PHY) which provides all the physical layer functions needed to transmit and receive data over a single unshielded twisted-pair cable. The transceiver communicates to half−duplex 10 Mbits/s-capable Ethernet controllers via a standard MII interface.
The NCN26010 Ethernet incorporates both an Ethernet media access controller (MAC) and a 10BASE-T1S PHY for data communication over a single unshielded twisted-pair cable. The NCN26010 communicates to a host microcontroller via an Open Alliance MACPHY SPI protocol.
The noise immunity of the NCN26000 and NCN26010 is far higher than is specified in the 10BASE-T1S standard: a proprietary enhanced noise immunity feature provides robust signal detection in noisy industrial environments, and can extend the network range to up to 50 m. The NCN26000 and NCN26010 also offer very low line capacitance, enabling them to support five times the node requirement of the IEEE 802.3cg standard, up to 40 nodes on a 25 m segment. This helps factory operators to save more on the cost of wiring and installation.
Multi-drop Ethernet offers a way to reduce the wiring and installation costs which dominate the networking budget in many factories: a network can be completed with up to 70% fewer cables while reducing installation costs by as much as 80%. 10BASE-T1S also offers the flexibility to repurpose nodes after the initial installation.
Additional benefits include:
Part Number: NCN26000XMNEVB
The NCN26000XMNEVB board for the onsemi NCN26000 10BASE-T1S Ethernet transceiver enables developers to evaluate the device’s performance in networks connected by unshielded twisted-pair cable.
This board provides a connection to third-party microcontroller evaluation boards which support a Clause 4-compliant MII interface. Additionally, it includes a USB Type-C® connector, facilitating connection to any PC based on a Linux® or Windows operating system. This enables PCs to join a 10BASE-T1S multi-drop network. The board can also be used to monitor traffic on the multi-drop segment by running the Wireshark network protocol analyzer on a PC.
Part Number: NCN26010XMNEVK
The NCN26010XMNEVK from onsemi demonstrates the basic functionality of the NCN26010 Ethernet controller and transceiver, and doubles as a laboratory tool to allow engineers to develop embedded software drivers for the NCN26010 device.
The evaluation kit consists of the NCN26010BMNEVB bridge board and the NCN26010XMNEVB 10BASE-T1S evaluation board.
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