Festo VIFB11-02 Series Manual page 78

VIFB11 - 02
4-38
4. Installation
PLEASE NOTE
The electronic components and inputs have a
greater tolerance range of the 24V operating
voltage than the outputs. Under certain cir-
cumstances, this can cause the electronic
components to indicate the switching status of
the outputs, although the latter are not in the
switched position (operating voltage of the out-
puts outside the tolerance range).
The 24 V operating voltage of the outputs
should be tested whilst the system is oper-
ating. Please ensure that the operating voltage
of the outputs is within the permitted toler-
ances even during full operation.
PLEASE NOTE
• Always connect the earth potential to pin 4
of the operating voltage connection.
• Connect the earth connection
terminal to the earth potential with low im-
pedance (short cable with large sectional
area).
• By means of low impedance connections,
make sure that the housing of the valve
terminal and the earth connection at pin 4
have the same potential and that there are
no equalizing currents.
You can thereby avoid interference due to
electromagnetic influences.
of the valve
0503f