Pilot Control Of The Valve Solenoid Coils (Pilot Air) - Festo Smart cubic CPA-SC Series Manual

3. Installation
3.2

Pilot control of the valve solenoid coils (pilot air)

3−6
2. Ascertain the valve terminal which controls this cylinder.
3. Remove the silencer on connection 3/5, if fitted.
4. Hold a piece of white cardbord 10 cm in front of the
exhaust port.
5. Let the system operate for some time.
The cardboard may only assume a slightly yellow
colouring. If oil drops out, this clearly indicates
over−lubrication.
A further indication of over−lubrication is the colouring or
status of the exhaust silencer. A clearly yellow colouring of
the filter element or oil drops on the silencer indicate a too
high lubricator setting.
Caution
Operate the CPA−SC valve terminal only with compressed
·
air or inert gases (e.g. nitrogen).
Valve terminals with externally supplied pilot air:
·
For the pilot air (connections 12/14) use the above
named media, if possible, non−lubricated. Otherwise
note the instructions in the section Preparing the com
pressed air".
Valve terminals with internally branched pilot air:
·
For the supply air (connection 1) use the above named
media, if possible, non−lubricated. Otherwise note the
instructions in the section Preparing the compressed
air".
Pilot control of the valve solenoid coils can be undertaken
with internal or external pilot air, depending on the base
block. You can ascertain the pilot control variant for which
your CPA−SC valve terminal is equipped, by means of the fol
lowing features (see table).
Festo P.BE−CPASC−EN en 0412b