| Measuring of the operation pressure and release of an electrical signal while reaching the response pressure three times redundant)
| | Testing of the safety functions
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| Signalisation of the safety function of the electro-pneumatic and hydraulic control
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| 3-times redundant | | | Testability of function during operation | | | Pressure switches can be checked during operation | |
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| TÜV-Type Test Approval in connection with electo-pneumatic and hydraulic control
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