Pilz PSEN cs4.1a - Manual (Page 6)

PSEN cs4.1a/b/p/M12
Operating Manual PSEN cs4.1a/b/p/M12
22187-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
&