The work is devoted to a new technology that provides low and predictable data transmission delays in industrial Ethernet networks. The traffic is divided into critical and non-critical to delays. The features of TSN functioning are considered. The operating principle and architecture of such networks are considered. It is shown that cost reduction can be achieved by having only one network that meets the requirements of deterministic networking and is compatible with modern Ethernet solutions. Examples are given and it is shown that deterministic networks can be used to create hard real-time systems. This is especially true for automatic regulation and control systems that include feedback circuits. The key features of TSN that provide guaranteed message delivery times are traffic transmission time synchronization and scheduling. The TSN switch is presented as two subsystems, one of which performs standard Ethernet functions, and the second provides the TSN control logic. An example of cyclic traffic control according to the schedule is considered. The prospects of using TSN technology in industrial automation control networks are shown.