PNOZ XV3.1P
Operating Manual PNOZ XV3.1P
20516-EN-09
| 10
Function Description
The safety relay PNOZ XV3.1P 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 reset circuit Y39-Y40 and the start circuit S13-S14 are closed.
} Input circuit is closed (e.g. E-STOP pushbutton not operated):
– The "START" LED is lit.
– The LEDs "CH.1", "CH.1 [t]", "CH.2" and "CH.2 [t]" are lit.
– Safety contacts 13-14, 23-24, 33-34, 57-58 and 67-68 are closed, auxiliary contact
41-42 is opened. The unit is active.
– The "START" LED goes out.
} Input circuit is opened (e.g. E-STOP pushbutton operated):
– The LEDs "CH.1" and "CH.2" go out.
– Safety contacts 13-14, 23-24 and 33-34 are opened redundantly, auxiliary contact
41-42 is closed.
– Safety contacts 57-58 and 67-68 open after the delay time has elapsed.
– The LEDs "CH.1 [t]" and "CH.2 [t]" go out.
Before the unit can be restarted, the delay time must have elapsed and the unit must again
be ready for operation.
Set delay time:
On units with selectable delay time, the delay time of the safety contacts 57-58 and 67-68
can be set on the front of the unit using a screwdriver.
Reset function:
The delay time cycle can be ended prematurely by opening the reset circuit Y39-Y40. For
this purpose, one N/C contact is connected between Y39-Y40 instead of a link.
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 circuit,
detects PNOZ XV3.1P
– earth faults in the start and input circuit,
– short circuits in the input circuit,
– Shorts across contacts in the input circuit.
} Dual-channel operation without detection of shorts across contacts: Redundant input cir-
cuit, detects PNOZ XV3.1P
– earth faults in the start and input circuit,
– short circuits in the input circuit.
} Automatic start: Unit is active once the input circuit has been closed.
} Monitored start: Unit is active once the input circuit is closed and once the start circuit is
closed after the waiting period has elapsed (see Technical details [ 18]).
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