The EL6900 is a TwinSAFE Logic Terminal from Beckhoff, designed as a dedicated safety controller for safety-oriented applications. Here's a detailed overview:

• Functionality: It processes safe input signals and generates safe output signals using certified function blocks. These range from simple Boolean functions (like AND, OR) to more complex ones for muting safety functions.

• Connections: It supports up to 128 safe communication devices via FSoE (Fail Safe over EtherCAT).

• Programming: The EL6900 is programmed using the TwinCAT 3 Safety Editor or TwinCAT 2.

• Backup and Restore: It includes a feature for easy replacement of the safety controller during servicing.

• Technical Specifications:

  • Protocol: TwinSAFE/Safety over EtherCAT

  • Cycle Time: Approximately 500 µs (depending on project size)

  • Safety Standards: Complies with DIN EN ISO 13849-1:2008 (Cat. 4, PL e) and EN 61508:2010 (SIL 3)

  • Protection Rating: IP20

  • Installation: Mounted on a 35 mm DIN rail

  • Weight: Approximately 50 g