Emergency Switching Off And Emergency Stop - Siemens SINAMICS G120C Operating Instructions Manual
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Also See for SINAMICS G120C:
- Operating instructions manual (470 pages) ,
- Compact operating instructions (92 pages) ,
- Getting started (68 pages)
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8.16.3
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.
Table 8-42
Action:
Risk:
Measure to minimize
risk:
SINAMICS G120C Converters
Operating Instructions, 02/2023, FW V4.7 SP14, A5E34263257B AK
The distinction between "EMERGENCY OFF" and "EMERGENCY STOP"
EMERGENCY OFF
Electric shock
Switch off the power supply
Either completely or partially switch
off hazardous voltages
Advanced commissioning
8.16 Safe Torque Off (STO) safety function
EMERGENCY STOP
Stop Category 0 according to
EN 60204‑1
Unexpected movement
Prevent movement
Prevent any hazardous movement
257
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