Siemens SINAMICS S200 - Page 585

A.2 EMERGENCY OFF and EMERGENCY STOP
Overview
In plants, sys
tems and machines a distinction must be made between "EMERGENCY OFF" and
"EMERGENCY STOP".
The Safe Torque O󹪜 (STO) Safety Integrated function is suitable for implementing an
"EMERGENCY STOP" but is not suitable for implementing an "EMERGENCY OFF".
Description of function
IEC60204‑1 de󹪝nes "EMERGENCY OFF" and "EMERGENCY STOP":
• "EMERGENCY OFF" and "EMERGENCY STOP" are actions taken in an emergency.
• "EMERGENCY OFF" and "EMERGENCY STOP" reduce di󹪜erent risks in the machine or system:
– "EMERGENCY OFF" reduces the risk from electric shock.
– "EMERGENCY STOP" reduces the risk from unexpected movement.
Table A-1 The distinction between "EMERGENCY OFF" and "EMERGENCY STOP"
Action: EMERGENCY OFF EMERGENCY STOP
Stop category0 according to IEC60204‑1
Risk:
Electric shock
Unexpected motion
Measure to minimize risk: Switch o󹪜 voltage
Switch o󹪜 hazardous voltages completely
or in part
Prevent movement
Prevent any hazardous movement
Classic solution: Switch o󹪜 the voltage: Switch o󹪜 the power supply of the drive:
.
Appendix
A.2EMERGENCY OFF and EMERGENCY STOP
SINAMICS S200 pulse train servo drive system with SIMOTICS S-1FL2
Operating Instructions, 11/2023, FW V6.3, A5E51646767B AA 583