2009/06 – Subject to change
29
Internet: www.festo.com/catalogue/...
Valve terminals type 32 MPA
Key features – Pneumatic components
Blanking plate
Plate without valve function for
reserving valve positions on a valve
terminal.
Valves and blanking plates are
attached to the manifold block using
two screws.
Valve function
Code
Circuit symbol
Size
Description
y
1
2
p
L
–
For valve terminal only:
Blanking plate for vacant valve position
Compressed air supply and venting
Pneumatic interface
The valve terminal MPA can be sup-
The main supply to the valve terminal
These vents are located on the
p
plied with air at one or more points.
This ensures that the valve terminal
will always have a sufficient supply of
air and that this air will be vented,
even with large-scale expansions.
pp y
is located on the pneumatic interface,
which links the electrical and the
pneumatic parts. Additional provision
is made for a number of supply plates.
Venting is either via integrated flat
plate silencers or common lines for
pneumatic interface as well as on the
supply plates.
In the case of ducted exhaust, at least
one additional supply plate is re-
quired that then contains the exhaust
port for the pilot air supply (port
Supply plate
plate silencers or common lines for
ducted exhaust.
port for the pilot air supply (port
82/84).
ducted exhaust.
82/84).
Pilot air supply
The port for the main pneumatic
supply is located on the pneumatic
interface.
The ports differ for the following types
of pilot air supply:
•
Internal
•
External
Internal pilot air supply
Internal pilot air supply can be
selected if the required working
pressure is between 3 and 8 bar.
The pilot air supply is then branched
from the compressed air supply 1 in
the pneumatic interface using an
internal connection. Port 12/14 is
sealed with a blanking plug.
External pilot air supply
If the supply pressure is less than
3 bar or greater than 8 bar, you must
operate your MPA valve terminal with
external pilot air supply.
In this case the pilot air is addition-
ally supplied via port 12/14 on the
pneumatic interface.
-H-
Note
If a gradual pressure build-up in the
system using a soft-start valve is
chosen, an external pilot air supply
should be connected so that the
control pressure applied during
switch-on is already very high.
