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Power Module PM330

Hardware Installation Manual, 12/2018, A5E32844552B AF

105

Fundamental safety technology principles

7.1

Standard stop functions

7.1.1

Emergency Off and Emergency Stop

"Emergency Off" and "Emergency Stop" are commands that minimize different risks in the

machine or plant.

The STO function is suitable for achieving an Emergency Stop but not an Emergency Off.

You can review the details about the definitions in EN 60204-1.

Risk: Risk of electric shock:

Risk of unexpected motion:

Measure to minimize

risk:

Safe switch off

Switching off the electric power sup-

ply for the installation, either com-

pletely or partially.

Safely stop and safely prevent re-

starting

Stopping or preventing the dangerous

movement

Command:

Emergency Off

Emergency Stop

Solution: Switch off the power supply:

Select STO:

It is permissible that you switch off

the inverter power supply as well.

However, switching off the voltage is

not required as a risk-reduction

measure:

Siemens PM330 User Manual

Questions and Answers: