The customer wants to use ZART8L. They will use 2 additional push-button to control the grab(open and close). They would like to be able to use hoisting motion only when the grab totally opened or closed. Is it possible to do that?

With the ZART8L + ZARB12* you haven't any internal possibilities i.e. you have to built an external solution. With the ZART*D + ZARB18* it is possible to use the Limit Switches inputs of the concerned movements in order to block them until the grab end is movement.

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