Function description, Block diagram – Pilz PSEN cs4.2a User Manual
Page 6
PSEN 4.2a/b/p/M12
Operating Manual PSEN 4.2a/b/p/M12
22188-EN-02
6
Function description
There is a high signal or a low signal at the safety outputs, depending on the position of the
actuator and the state of the inputs. The signal output Y32 signals the position of the actua-
tor.
State of the inputs and outputs:
Actuator in
the response
range
Input S11
Input S21
Safety out-
put 12
Safety out-
put 22
Signal out-
put Y32
Yes
High
Low
High
Low
High
Yes
Low
High
Low
High
High
Yes
High
High
High
High
High
Yes
Low
Low
Low
Low
High
No
x
x
Low
Low
Low
x: High or low signal
The outputs cannot be switched back on until there is a low signal at both inputs simultane-
ously.
Safety inputs S11 and S21 are monitored for feasibility. A high signal can be present at the
inputs at offset times; the low signal must be present at both inputs simultaneously (partial
operation lock).
Block diagram
Input
A1 A2
Power
S11 S21
12 22
Y32
Receiver
Actuator
&