Emergency Switching Off And Emergency Stop - Siemens SINAMICS G110M Operating Instructions Manual

Advanced commissioning
8.15 Safe Torque Off (STO) safety function
8.15.1

EMERGENCY SWITCHING OFF and EMERGENCY STOP

Overview
In plants, systems and machines a distinction must be made between "EMERGENCY OFF" and
"EMERGENCY STOP". The STO safety function is only suitable for implementing an "EMERGENCY
STOP".
Function description
EN 60204‑1 defines "EMERGENCY OFF" and "EMERGENCY STOP":
• "EMERGENCY OFF" and "EMERGENCY STOP" are functions that are used in an emergency.
• "EMERGENCY OFF" and "EMERGENCY STOP" minimize different risks in the system or
machine.
– "EMERGENCY OFF" minimizes the risk of electric shock.
– "EMERGENCY STOP" minimizes the risk of unexpected motion.
• Stop Categories 0, 1 and 2 are available for EMERGENCY STOP.
Action:
Risk:
Measure to minimize
risk:
244
EMERGENCY OFF
Electric shock
Switch off the power supply
Either completely or partially switch
off hazardous voltages
Operating Instructions, 10/2020, FW V4.7 SP13, A5E31298649B AL
EMERGENCY STOP
Stop Category 0 according to
EN 60204‑1
Unexpected movement
Prevent movement
Prevent any hazardous movement
Distributed converter for SIMOGEAR geared motors