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AUTBUS


Introduction

AUTBUS is an industrial single pair cable communication fieldbus based on OFDM- Orthogonal Frequency Division Multiplexing technology. Up to 254 multidrop passive node connections can be achieved over up to 500 metres at a transmission speed of 100Mbit/s. It can solve mission-critical deterministic challenges in a wide variety of industrial applications.

Leveraging the tunnelling technology, AUTBUS can carry IPV4/IPV6 data over single pair, it simultaneously enables the transmission of both time-sensitive and non-time-sensitive data as a virtual bus. AUTBUS implements real-time, high reliability and deterministic transmission and application for both industrial fieldbus data and ISO/IEC/IEEE 8802-3 Ethernet data by shared medium bus.

Origin
AUTBUS was developed by Kyland Technology, Beijing, China, in 2020. At the time this article was realized the AUTBUS is still in standardization phase (planned to be released in 1st Quarter 2023) and is listed under the number IEC 61158 Type 28 (Industrial communication networks - Fieldbus specifications and Profiles - Type 28 elements) and IEC 61784 CPF22 (Industrial communication networks. Broadband fieldbus specification.)

Technology
AUTBUS is based on static/dynamic time-driven and Orthogonal Frequency Division Multiplexing (OFDM) technology. The OFDM method has so far been popularly used in wireless communication

Key Technical Features

 * Up to 254 passive multidrop nodes with T-connectors or vampire clamps
 * 2 Wire Twisted Pair Cable (polarity-non sensitive), e.g. with SPE cable and connectors
 * 100Mbps high data bandwidth with fix and dynamic bandwidth allocation
 * Up to 500 meters distance depending on cable type and multidrop nodes quantity
 * Real time deterministic, low latency time
 * High availability due to fail-safe bus and ring redundancy

Applications
Factory Automation - PLC, actuators, sensors for, machines, robots, ..

Building Automation - Access control and security surveillance, climatization (HVAC)

Battery Management System - Connecting of multiple battery managers to main controller.

Warehouse and Carpark - Sensor and displays

Electric Charging Stations - Serial connection

Public Transport - Onboard Communication to sensors, displays, cameras

Traffic Control - Serial bus communication instead of point-to-point data lines

External links section
A technical paper of the Single Pair Ethernet System Alliance