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2.
Safety
2.1.
Safety-related systems
The use of PLC controls in safety-related systems requires specific measures. If a PLC control-
ler is to be used in a safety-related system, the user must be given comprehensive advice by
the PLC manufacturer in addition to any available standards or guidelines regarding safety in-
stallations.
Before starting work on the devices, switch off all power supplies, including those of con-
nected peripherals.
Keep all ventilation openings unobstructed.
The failure of certain components in an electronic control system may result in uncontrolled
and/or unpredictable operational behaviour.
All types of failure must be considered at the system level and the associated preventative
measures identified.
If necessary, request information from your automation system provider.
2.2.
Safety instructions
The device may only be operated in a flawless condition. Exposed sharp edges pose a risk of
injury.
Working on the device
Do not start work on the device until all necessary safety precautions have been taken. Take
precautions to avoid unforeseeable functional events and movements of the system.
Bring the system into a safe state.
Switch the system and the device off.
Secure the system against being switched on again.
Disconnect the device from the system.
Do not open the device housing.
If it is necessary to work on internal parts of the device, contact the manufacturer (see
“Customer services / addresses”).
