The safety functions are available in all modes and can communicate with the process using safety-related input/output signals. These can be implemented individually for each axis and spindle. The following Safety Integrated functions are available (terms in accordance with IEC 61800-5-2):

Safety Integrated basic functions

• Safe Torque Off (STO)
  Prevention of unexpected startup by internal cancellation of the drive pulses
• Safe Brake Control (SBC)
  Safe brake control of holding brakes which are active in the de-energized state, e.g. motor holding brakes.
• Safe Stop 1 (SS1)
  Safe stopping of the drive with subsequent prevention of unexpected startup (STO).

Extended Safety Integrated functions

• Safe Operating Stop (SOS)
  Monitors drives for standstill. The drives remain fully functional for position control.
• Safe Stop 2 (SS2)
  Safe stopping of the drive with subsequent monitoring for standstill (SOS).
• Safely Limited Speed (SLS)
  Monitoring of configurable velocity limit values, e.g. during setup
• Safe Speed Monitor (SSM)
  Safe checkback signal when a value falls below a settable speed limit, e.g. for enabling a protective door
• Safe Acceleration Monitor (SAM)
  Safe monitoring of drive acceleration
• Safe Direction (SDI)
  Safe monitoring of the direction of motion

The basic functions of Safety Integrated are activated via the terminals of the SINAMICS S120 Combi Power Modules or the SINAMICS S120 Motor Modules in booksize compact format and SINUMERIK 828.

A SINAMICS TM54F Terminal Module is required for controlling the extended Safety Integrated functions.

We recommend the following safety relays for the configuration of the safe control logic for individual safety functions:

• SIRIUS 3SK1 safety relay for configuring a hardware link
• SIRIUS 3RK3 Modular Safety System for a graphically parameterizable solution