Pilz PSEN ml b 1.1 - Connection to control systems and evaluation devices; Important information

Connection to control systems and evaluation devices
Operating Manual PSEN ml b 1.1/2.1/2.2
1003884-EN-12
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6 Connection to control systems and evaluation
devices
6.1 Important information
The selected evaluation device must have the following properties:
} 2-channel with plausibility monitoring
Both OSSDs must change the switch state synchronously. In particular, the evaluation
device must monitor that the state of both OSSDs was "Gate unlocked" before both return
to the "Gate locked" state and vice-versa.
} OSSD signals are evaluated through 2 channels.
} The state of the OSSDs must be tested before and after safety inputs S31 and S41 are
activated (solenoid operation) (see Timing diagram [ 16]).
} The use of Safety Device Diagnostics is described in the System Description "Safety
Device Diagnostics".
WARNING!
Risk of injury due to loss of the safety function.
The safety function can be lost when the safe state is not checked regularly.
– Use an evaluation device/safety system to test whether the plant is in
a safe condition.
– Do not operate the solenoid via S31/S41 unless the plant is in a safe
condition.