| 摘要 |
<p>A universal module for a pneumatic fixed-cycle control incorporates a bistable storage circuit having a first two-position valve including an inlet opening connected to an operating pressure source and a servomotor operable to shift the valve slide and connected to a start connecting opening of the bistable storage circuit. The first valve is actuable to provide an output pressure defining an activating signal for a load associated with the module. A second two-position valve acts as an AND-member, has an input opening which is loaded with the activating signal and has a valve slide servomotor which is loaded with a repeating signal. A two-way valve acts as an OR-member that has two inputs connected to stop connecting openings of the module and an output connected to a stop connecting opening of the bistable storage circuit. The first two-position valve of the bistable storage circuit is initially biased under the force of a spring to its closing position. The servomotor of the first two-position valve is connected through a second two-way valve to the start connecting opening of the bistable storage circuit and the output of a third two-position valve. The third two-position valve has a valve slide initially biased by a spring into its pass position. The third two-position valve has an input connected to the output of the first two-position valve, has an output which makes available the activating signal, and has a servomotor connected to the stop connecting opening of the bistable storage circuit.</p> |
