| 摘要 |
Logic unit for pneumatic circuits which has a reversing valve as an AND element, allocated to the closing body of which is a second valve seat with which it forms an OR element. The reversing valve has two valve seats (2, 3) turned away from one another and having two closing bodies (7, 8) which are in drive connection with one another through a connecting passage (4) between the two valve seats (2, 3) and in each case control the connection between a signal input (11, 14) and a common output (12). Allocated to one of the two closing bodies (8) is a second valve seat (10) via which the connection to the associated signal input (14) is run. In addition, a further output (13) is run to the outside from the space (6) between the two valve seats (3, 10) of the double non-return valve thus formed. When the two signal inputs (13, 14) allocated to the non-return valve (8) are connected to one another, the logic unit works as an AND element. On the other hand, if the other signal input (11) is connected to the output (12), the logic unit functions as an OR element, in the course of which the output (13) additionally provided serves as signal output. <IMAGE>
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