PFH calculation for a complete loop

We will treat the example of monitoring an emergency stop control organ and a movable protector  

If we take the calculations above with the following parameters for the two channel emergency stop  

C Number of times that the device is actuated l 10-Vh Assumptions it is actuated 10 times per hour User 

Dangerous failure rate of the detecting sub-system element (Ane). 

T1 Usage time 87600h Lifetime of the position switch 

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