Pilz PNOZ s4 C 48-240VACDC 3 n/o 1 n/c - Manual (Page 7)

PNOZ s4
Operating Manual PNOZ s4
21396­EN­13 7
Function description
} In2+
Single­channel operation: no redundancy in the input circuit, earth faults in the start
circuit and input circuit are detected.
} Dual­channel operation without detection of shorts across contacts: redundant input cir­
cuit, detects
– earth faults in the start and input circuit,
– short circuits in the input circuit and, with a monitored start, in the start circuit too.
} In2-
Dual­channel operation with detection of shorts across contacts: redundant input cir­
cuit, detects
– earth faults in the start and input circuit,
– short circuits in the input circuit and, with a monitored start, in the start circuit too,
– shorts between 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 is closed and then the start circuit is
closed.
}
Monitored start with falling edge: 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.
}
Monitored start with rising edge: Unit is active once the input circuit is closed and
once the start circuit is closed after the waiting period has elapsed (see technical de­
tails).
}
Start with start­up test: The unit checks whether safety gates that are closed are
opened and then closed again when supply voltage is applied.
} Increase in the number of available instantaneous safety contacts by connecting con­
tact expander modules or external contactors/relays;
A connector can be used to connect 1 PNOZsigma contact expander module.
Installation
Install base unit without contact expansion module:
} Ensure that the plug terminator is inserted at the side of the unit.
Connect base unit and PNOZsigma contact expansion module:
} Remove the plug terminator at the side of the base unit and at the contact expansion
module.
} Connect the base unit and the contact expansion module to the supplied connector be­
fore mounting the units to the DIN rail.
Installation in control cabinet
} The safety relay should be installed in a control cabinet with a protection type of at least
IP54.
} Use the notch on the rear of the unit to attach it to a DIN rail (35 mm).
} When installed vertically: Secure the unit by using a fixing element (e.g. retaining
bracket or end angle).