Festo IFB05-03 Manual page 54

3. Installation
3−20
Potential equalization
The valve terminal has two earth connections for potential
equalization.
on the load voltage connection (pin 4 incoming socket).
on the left−hand end plate (M4 thread).
Please note
S Always connect the earth potential to pin 4 of the volt
age connection.
S Connect the earth connection of the left−hand end plate
to the earth potential with low impedance (short cable
with large cross−sectional area).
S By means of low−impedance connections, you can be
sure that the housing of the valve terminal and the earth
connection at pin 4 have the same potential and that
there are no equalizingcurrents.
You can thereby avoid interference due to electromagnetic
influences and you can ensure electromagnetic compatibil
ity in accordance with the EMC guidelines.
Festo P.BE−VIFB5−03−EN en 0503e