Machine movements create a range of hazards for machine operators and maintenance personnel. Anyone coming into contact with the machine therefore has to be protected from injuries at all times and during all operating phases, from commissioning to decommissioning. Integrated control and safety technology is a prerequisite for safe and economic automation. With the integration of safety technology into drive technology, Beckhoff consistently developed the TwinSAFE system philosophy further. TwinSAFE enables integrated automation, ranging from digital inputs and logic systems to drives or digital outputs. Simple handling, diagnostic and support functions help the user to implement the required application quickly and safely.
The “Safety of machinery” standard, EN ISO 13849‑1:2006, which replaces the existing EN 954‑1, places even greater responsibility on the machine manufacturer.
The safety of a machine is either assessed by Performance Level (PL a‑e) EN ISO 13849‑1:2006 or Safety Integrity Level (SIL 1‑4) IEC 62061. To this end, the safety-related functions for drives are defined in IEC 61800‑5‑2.
Drive-integrated safety significantly simplifies the realisation of the required safety functions. Safety sensors (e.g. light curtains, emergency stop buttons, OK buttons) are collected via the fieldbus where they are installed. The required function is triggered in the TwinSAFE Logic Bus Terminal or the TwinSAFE PLC, and the Servo Drive carries it out.
Two TwinSAFE option cards are available for the AX5000: AX5801-0000 and AX5805-0000 (for functional descriptions see next page).
Option card AX5801-0000
Control takes place via a digital output of a TwinSAFE Terminal to AX5801-0000. For all functions the mains voltage remains connected at the Servo Drive.
Option card AX5805-0000
Control is performed via EtherCAT; no further wiring is required. For all functions the mains voltage remains connected at the Servo Drive.