Festo VIFB-02 Series Manual page 68

VIFB8 – 02
9706
4. Installation
PLEASE NOTE
The electronic components and the inputs
show a greater tolerance range of the 24V DC
operating voltage than the outputs. Under cer-
tain circumstances this can cause the electro-
nic components to indicate the switching sta-
tus of the outputs, although the latter are not
in the switched position (operating voltage of
the outputs outside tolerance range).
The 24 V DC operating voltage of the outputs
should be tested whilst the system is operating.
Please see that the operating voltage of the out-
puts is within the permitted tolerances even dur-
ing full operation.
PLEASE NOTE
• Always connect the earth potential to pin 4
of the operating voltage connection.
• Connect the earth cable of the left-hand end
plate to the earth potential with low impe-
dance (short cable with large diameter).
By means of low impedance connections,
make sure that the housing of the valve termi-
nal and the earth connection at pin 4 have
the same potential and that there are no equa-
lizing currents. You can thereby avoid interfe-
rence due to electromagnetic influences.
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