4.8 Special regulations and restrictions
NOTE
Each application has its particular conditions of use and ambient requirements. For this reason, the safety-related
assessment of a system must always take the actual process into account – in addition to the general statements
concerning probability of failure, tolerances and failure rates of the components. Special application-specific fac-
tors such as chemical and physical stresses may thus cause the premature wear of the devices and must therefore
be taken into consideration when planning systems. Take special measures to compensate for a lack of experience
based values, e.g. through the implementation of shorter test intervals. The estimation of the diagnostic coverage
(DC) can vary from application to application. The estimation of the hardware fault tolerance (HFT) can only take
place if the use of the compliant object is restricted.
5 Installation and commissioning
DANGER
Failure caused by commissioning and operating errors
Danger to life if safety function fails!
Ensure that the product is only fitted, installed, operated and maintained by trained and qualified personnel.
5.1 Mounting
Observe the mounting instructions in the user manual.
5.2 Connection
Observe the mounting instructions in the user manual.
5.2.1 Wiring diagrams
+ 1
– 2
10 –
7 +
12 –
11 +
0/4...20 mA
III III
3
HART®
GN
I
?
?
?
HHT
PowerPwr
1
+ 1
2
– 3
+ 2
– 3
HART®
HART®
210 Ω
1
0/4...20 mA
(source)
RL ≤ 500 Ω
Fig. 1: Block diagram of the IM33-11Ex-Hi/24VDC
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