USER HANDBOOK 2.0 | DC20XX, ET20XX, ECC21XX SLIM
Berghof Automation GmbH | Harretstrasse 1 | 72800 Eningen | www.berghof.com
Dialog-Controller-DC20XX_EN.docx
2. Safety
Safety-related systems
The use of PLC in safety-related systems requires specific measures. Wherever a PLC is to be used in a safety-
related system, the user must be given comprehensive advice by the PLC manufacturer in addition to
information on any available standards or regulations regarding safety installations.
Before starting any work on devices, switch off all power feeds, including peripherals.
Keep all ventilation holes unobstructed.
Failure in 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.
2.1. Safety instructions
The device may be operated only when it is in good working condition. Exposed sharp edges pose an injury
risk.
If you discover damage to the front glass of the device, do not continue to operate the device.
Immediately disconnect it from the power supply.
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.
1st Bring the system into a safe condition.
2nd Switch the system and the device off.
3rd Secure the system against being switched on again.
4th Disconnect the device from the system.
The casing of the device must not be opened.
If work on the internal parts of the device is necessary, contact the manufacturer (see “Addresses”).
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