PNOZ X9
Operating Manual PNOZ X9
19526-EN-09
9
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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.
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Automatic start: Unit is active once the input circuit has been closed.
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Manual start: Unit is active once the input circuit and the start circuit are closed.
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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.
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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
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Power: Supply voltage
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Start: Start circuit
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Input: Input circuit
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Output safe: Safety contacts
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Output aux: Auxiliary contacts
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Out semi ON: Semiconductor output supply voltage
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Out semi OUT: Semiconductor output switch state
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[1]: Automatic start
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[2]: Manual start
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[3]: Monitored start
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a: Input circuit closes before start circuit
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b: Start circuit closes before input circuit
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t
1
: Switch-on delay
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t
2
: Delay-on de-energisation
