The I/O construction kit is extended safely
With the TwinSAFE Bus Terminals, Beckhoff offers the option of simply expanding the proven Bus Terminal system, and to transfer the complete cabling for the safety circuit into the already existing fieldbus network. Safe signals can be mixed with standard signals without restriction. This saves design effort, installation and material. Maintenance is simplified significantly through faster diagnosis and simple replacement of only a few components. The TwinSAFE Bus Terminals only include three basic functionalities: digital inputs (KL19xx), digital outputs (KL29xx), and logic terminal (KL6904). For a large number of applications, all sensors and actuators can be wired on these Bus Terminals. The required logical link of the inputs and the outputs is handled by the KL6904 TwinSAFE controller. For small configurations, the tasks of a fail-safe PLC can thus be handled within the Bus Terminal system.

TwinSAFE Bus Terminals
The TwinSAFE Bus Terminals enable connection of all common safety sensors and actuators. They can be operated in standalone mode with the KL6904 TwinSAFE Logic Bus Terminal. The TwinSAFE protocol is used for safe communication.

The TwinSAFE Logic Bus Terminal is the link unit between the TwinSAFE input and output terminals. It enables the configuration of a simple, flexible and cost-effective decentralised safety control system.

Therefore, there are no safety requirements for the higher-level control. The typical safety functions required for the automation of machines, such as emergency off, safety door, two-hand etc. are already permanently included in the KL6904. The user can configure the terminal according to the safety requirements of his application.