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Unformatted text preview: idle return directions. 1
4 Active zones (1, 2) Counting direction (3) Idle return direction (4) Fig. 15.1.4: Inductive proximity sensor with idle return function 15.1.9 Self-monitoring proximity sensors
The self-monitoring proximity sensor (safety switch) is used in all those instances
where a high degree of reliability is required. A fault occurring with the switch is
detected by the evaluation unit and triggers the required actions. Generally the
entire installation is switched to safe status.
With some safety systems, not only the switch itself, but also the voltage supply
lines, the voltage supply and the evaluation electronics are continually checked. 232 © Festo Didactic GmbH & Co. KG • FP 1110 15. Special designs and variants of proximity sensors 1 1 2 3 F400 6 4
selbstüberwachend Production process (1) Error message (3) Intervention in production process (5) Fault (2) Error signal (4) Control (6) Fig. 15.1.5: Design example: Self-monitoring inductive sensor system (source: IFM) The connected senso...
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This note was uploaded on 11/01/2012 for the course CHEMICAL 102 taught by Professor Jamesrodriguez during the Spring '12 term at Universidad Politécnica de Cartagena.
- Spring '12