PNOZ X2.5P
Operating Manual PNOZ X2.5P
20407-EN-10
8
Function Description
The safety relay PNOZ X2.5P 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 start circuit S33-S34 is closed.
} Input circuit is closed (e.g. E-STOP pushbutton not operated):
– The LEDs "CH.1" and "CH.2" are lit.
– Safety contacts 23-24 and 33-34 are closed. The unit is active.
– The semiconductor output Y11-Y12 is enabled.
– The LED "Y11/Y22" will light.
} Input circuit is opened (e.g. E-STOP pushbutton operated):
– The semiconductor output Y11-Y12 is disabled.
– The LED "Y11/Y22" goes out.
– Safety contacts 23-24 and 33-34 are redundantly opened.
– The LEDs "CH.1" and "CH.2" go out.
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 X2.5P 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.
} Increase in the number of available contacts by connecting contact expander modules
or external contactors/relays.
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