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4) the IL transducer has relay output and is power supplied externally; the sensor detects the pressure and compares it with a
determined threshold; if the threshold is exceeded, the relay will open; the relay output is interfaced with an enable input of
the pressure generating system motor drive; when the threshold is exceeded, the open state of the relay stops the pressure
generating systems.
+24 Vdc
+24 Vdc
Motor drive
Motor drive
9.2. Restrictions of use
The device must only be used in accordance with these operating instructions for mechanical installation, electrical connection,
environmental conditions and use in order to maintain the declared SIL and PL degree. The sensors must be powered by non-
distributed networks and in any case with a length of less than 30 m.
9.3. Maintenance and periodic checks
The periodic maintenance to be carried out to ensure the permanence over time of the declared Failure Rates are:
• Visual inspection of the state of electrical and mechanical connections
Maintenance is aimed at assessing any problems due to situations of incorrect assembly over time or particular aggressiveness
of the processed material.
Periodicity: every two years
Visual inspection of the condition of the process membrane and stem threads.
Maintenance is aimed at assessing any abnormal abrasions or wear due to incorrect assembly situations over time. (see par. 5)
Periodicity: every year
• Checking the sensor installation seat
Maintenance is aimed at assessing the correctness of the profile and dimensions and the absence of material residues or
occlusions of the pressure channel.
Periodicity: every two years.
• Electronic calibration test (Reduced Proof Test)
The purpose of the test is to verify the correct functioning of the electronics.
It is carried out by performing the CAL procedure
Periodicity: every 6 months
30
Y splitter
RL1
RL1
RL2
RL2
Pressure
generation
system
IL transducer
Figure 8
80618_MAN_IO-LINK IMPACT_12-2019_ENG
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