Siemens SINAMICS G220 - Page 660

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 a system or machine:
– EMERGENCY OFF reduces the risk of electric shock.
– EMERGENCY STOP reduces the risk of unexpected movement.
Table 14-89 The distinction between EMERGENCY OFF and EMERGENCY STOP
Action: EMERGENCY OFF EMERGENCY STOP EMERGENCY STOP
Stop category0 according to
IEC60204‑1
Stop category 1 according to IEC
60204‑1
Risk:
Electric shock
Unexpected motion Motion
Measure to mini‐
mize risk:
Switch o󹪜 voltage
Switch o󹪜 hazardous voltages
completely or in part
Prevent movement
Prevent any hazardous movement
Stop movement
Stop hazardous movement and
prevent any restart.
Classic solution: Switch o󹪜 the voltage:

Switch o󹪜 the power supply of the
drive:
.
.
Brake the motor and switch o󹪜 the
drive power supply
Solution with the
STO or SS1 Safety In‐
tegrated Function
integrated in the
drive:
STO and SS1 are not suitable
for switching o󹪜 an electric
voltage.
Select STO:
.
Select SS1:
.
It is permissible that you switch o󹪜 the converter power supply as well.
However, switching o󹪜 the voltage is not required as a risk-reduction
measurement.
Functions
14.12Safety Integrated
SINAMICS G220 converter
658 Operating Instructions, 04/2024, FW V6.2, A5E51781573B AB