Datasheet

Relays for functional safety
Safety relays PNOZ X
PNOZ X2.1VP
Pilz GmbH & Co. KG, Felix-Wankel-Straße 2, 73760 Ostfildern, Germany
Telephone: [phone], Telefax: [phone], E-Mail: [e-mail]
2016-09
43
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 X2.1VP 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.
Timing diagram
22
Output safe delay
Semi
v
[1] [2]
v
v
v
Legend
} Power: Supply voltage
} Start: Start circuit
} Input: Input circuit
} Output safe delay: Safety contacts, delayed
} Semi: Semiconductor output
} [1]: Automatic start
} [2]: Manual start
} a: Input circuit closes before start circuit
} b: Start circuit closes before input circuit
} t
1
: Switch-on delay
} t
2
: Recovery time
} t
v
: Delay time