Basic Safety - Sto - Lenze i550-C0.25/120-1 Project Planning Manual

Information on electrical installation
Functional safety

Basic Safety - STO

Basic Safety - STO
DANGER!
With the "Safe torque off" (STO) function, no "emergency‑stop" can be executed according to
EN 60204−1 without additional measures. There is no electrical isolation between the motor
and inverter and no service switch or maintenance switch!
Possible consequences: Death or severe injuries
▶ "Emergency stop" requires electrical isolation, e. g. via a central mains contactor.
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