PNOZ X9
Operating Manual PNOZ X9
19526-EN-09
9
} Dual-channel operation with detection of shorts across contacts: Redundant input cir-
cuit, PNOZ X9 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.
Timing diagram
Out semi OUT
Out semi ON
[2] [3]
[1]
Legend
} Power: Supply voltage
} Start: Start circuit
} Input: Input circuit
} Output safe: Safety contacts
} Output aux: Auxiliary contacts
} Out semi ON: Semiconductor output supply voltage
} Out semi OUT: Semiconductor output switch state
} [1]: Automatic start
} [2]: Manual start
} [3]: Monitored start
} a: Input circuit closes before start circuit
} b: Start circuit closes before input circuit
} t
1
: Switch-on delay
} t
2
: Delay-on de-energisation
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