Pneumatic control device and process control device equipped therewith
AssigneeFesto AG & Co.
InventorsBodo Neef, Christoph Maile
Life of this patent
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Abstract
A pneumatic control device includes a functional assembly that has an interruption valve device for the selective opening or interruption of at least one main working channel used for the pneumatic control of a pneumatic actuator. The functional assembly also contains a manually actuatable valve device that is connected to the interruption valve device by means of at least one auxiliary working channel and which enables manual pneumatic control of the connected actuator, if the at least one main working channel is interrupted by the interruption valve device at the same time. A process control device can also be equipped with a control device of this type.
Claims14
A process control device comprising:
- a functional assembly module, the functional assembly module having a housing, at least one main working channel within the housing, at least one auxiliary working channel within the housing, an interruption valve device contained within the housing for the selective opening or interruption of the at least one main working channel, a manually actuatable valve device connected to the interruption valve device via the at least one auxiliary working channel, and an assembly interface formed on an exterior of the housing;
- a pneumatic actuator connected to the functional assembly module housing, the pneumatic actuator being pneumatically controlled by the interruption valve device of the functional assembly module via the at least one main working channel, and being further pneumatically controlled by the manually actuatable valve device via the at least one auxiliary working channel only when the at least one main working channel is interrupted by the interruption valve device;
- and
- an electropneumatic control unit module detachably connected to the functional assembly module housing, the electropneumatic control unit module having a housing, an assembly interface formed on an exterior of the housing for detachable engagement with the assembly interface of the functional assembly module housing, control electronics contained within the housing for processing of feedback signals from the pneumatic actuator and a control valve electrically controlled by the control electronics, and pneumatically connected to the at least one main working channel of the functional assembly module.
Dependencies are inferred from the claim text.