1 About this safety manual
This safety manual contains instructions on the use of devices in safety instrumented systems (SIS). The consid-
eration of safety-related values is based on IEC 61508. The safety manual describes the values determined for the
SIL assessment and is only applicable in conjunction with the attached EXIDA FMEDA report Turck 04/07-14 R001.
Read this document carefully before using the device. This will prevent the risk of personal injury or damage to
property or equipment. Keep this manual safe during the service life of the device. If the device is passed on, hand
over this safety manual as well.
DANGER
Malfunction caused by operating errors
Danger to life if safety function fails!
Observe the instructions contained in this safety manual without fail if the device is to be used in safety-relat-
ed applications.
1.1 Target groups
This safety manual is designed for use by suitably qualified or trained personnel. It must be read and understood
by anyone entrusted with any of the following tasks:
■
Unpacking and mounting
■
Commissioning
■
Testing and maintenance
■
Troubleshooting
■
Disassembly and disposal
1.2 Explanation of symbols
The following symbols are used in this safety manual:
DANGER
DANGER indicates an immediate hazardous situation that, if not avoided, will result in death or serious injury.
NOTE
NOTE indicates tips, recommendations and important information. The notes contain information, particular op-
erating steps that facilitate work and possibly help to avoid additional work resulting from incorrect procedures.
MANDATORY ACTION
This symbol denotes actions that the user must carry out.
RESULT OF ACTION
This symbol denotes the relevant results of actions and procedures.
1.3 Abbreviations and terms
Definition of terms, see IEC 61508-4
DC diagnostic coverage
E/E/PE system electrical/electronic/programmable
electronic system
EUC equipment under control
dangerous failure
no effect failure
no part failure
safe failure
safe state
HFT hardware fault tolerance
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