User Manual
PNOZ 11
Operating Manual PNOZ 11
19147-EN-05
8
Function Description
The safety relay PNOZ 11 provides a safety-oriented interruption of a safety circuit. When
supply voltage is supplied the "POWER" LED is lit. The unit is ready for operation when the
feedback loop Y1-Y2 and the start circuit S33-S34 are closed. The "START" LED is lit.
} Input circuit is closed (e.g. E-STOP pushbutton not operated):
– The LEDs "CH.1IN" and "CH.2 IN" are lit.
– The "START" LED goes out.
– Safety contacts 13-14, 23-24, 33-34, 43-44, 53-54, 63-64 and 73-74 are closed,
auxiliary contact 81-82 is opened. The unit is active.
– The LEDs "CH.1" and "CH.2" are lit.
– A high signal is present at the semiconductor output switch state Y32.
} Input circuit is opened (e.g. E-STOP pushbutton operated):
– The LEDs "CH.1IN" and "CH.2 IN" go out.
– Safety contacts 13-14, 23-24, 33-34, 43-44, 53-54, 63-64 and 73-74 are opened re-
dundantly, auxiliary contact 81-82 is closed.
– The LEDs "CH.1" and "CH.2" go out.
– A low signal is present at the semiconductor output switch state Y32.
Semiconductor output supply voltage Y35
} A high signal is present at semi-conductor output Y35 if the supply voltage is present
and the internal fuse has not blown.
Operating modes
} Single-channel operation: No redundancy in the input circuit, earth faults in the start
and input circuit are detected.
} Dual-channel operation with detection of shorts across contacts: Redundant input cir-
cuit, PNOZ 11 detects
– earth faults in the start and input circuit,
– short circuits in the input circuit,
– shorts across contacts in the input circuit.
} Automatic start: Unit is active once the input circuit has been closed.
} Manual start: Unit is active once the input circuit and the start circuit are closed.
} Monitored start: Unit is active once
– the input circuit is closed and then the start circuit is closed and opened again.
– the start circuit is closed and then opened again once the input circuit is closed.
} Increase in the number of available contacts by connecting contact expander modules
or external contactors/relays.