Pilz PNOZ s50 C - Manual (Page 15)

Function description
Operating Manual PNOZ s50
1002194­EN­02 15
INFORMATION
At the safe inputs Y10 and Y11 / Y20 and Y21, a "0" signal must be present
before the corresponding output O1+/O1­ / O2+/O2­ can be switched by a
"1" signal at both inputs. If this is not the case, a fault is signalled and the
LED "Out 1" or "Out 2" flashes (the diagram below illustrates this, using the
dual­pole input Y10/Y11 and the output O1+/O1­ as an example).
O3
Fig.: Start­up condition for inputs Y10/Y11
INFORMATION
Please note: Inputs Y10/Y11 switch output O1+/O1­; inputs Y20/Y21 switch
output O2+/O2­. In the event of a fault, however, both outputs will switch off.
Status outputs O4/O5 also switch off, irrespective of the switch status of the
inductive load. At the time an input, e.g. Y11, is switched on, if the other in­
put, e.g. Y10, is not at "0", the fault signal output O3 will signal a fault via a
"0" signal.
After the output O1+/O1­ and/or O2+/O2­ is switched on, the voltage U
B1B2
is available for a
configurable overexcitation time U
over
. Once the overexcitation time t
over
has elapsed, the
voltage is reduced through pulse width modulation (PWM). The overexcitation time t
over
and
the reduced voltage U
Avg
are configured via the display.
INFORMATION
The overexcitation time t
over
can also be switched off for each power circuit.
In this case, the output voltage of the power circuits O1+/O1­ and/or O2+/
O2­ equals the supply voltage U
B1B2
.