Pilz PZE X4 24VDC 4n/o - Manual (Page 5)

PZE X4
Operating Manual PZE X4
1003199­EN­08 5
INFORMATION
This gives advice on applications and provides information on special fea­
tures.
Intended use
The unit meets the requirements of EN 60947­5­1, EN 60204­1 and VDE 0113­1. The con­
tact expansion module is used to increase the number of instantaneous safety contacts
available on a base unit. Base units are all safety relays with feedback loop monitoring.
The category that can be achieved in accordance with EN ISO 13849­1 depends on the
category of the base unit. The contact expansion module may not exceed this.
For your safety
} Only install and commission the unit if you have read and understood these operating
instructions and are familiar with the applicable regulations for health and safety at work
and accident prevention.
Ensure VDE and local regulations are met, especially those relating to safety.
} Any guarantee is rendered invalid if the housing is opened or unauthorised modifica­
tions are carried out.
} Note for overvoltage category III: If voltages higher than low voltage (>50 VAC or >120
VDC) are present on the unit, connected control elements and sensors must have a
rated insulation voltage of at least 250 V.
Unit features
} Positive­guided relay outputs:
– 4 safety contacts (N/O), instantaneous
} LED display for:
– Switch status channel 1/2
} Connection for feedback loop
} Operation: single­channel
Safety features
The unit meets the following safety requirements:
} The contact expander module expands an existing circuit. As the output relays are
monitored via the base unit's feedback loop, the safety functions on the existing circuit
are transferred to the contact expander module.
} The safety function remains effective in the case of a component failure.
} Earth fault in the feedback loop:
Detected, depending on the base unit that is used.
} Earth fault in the input circuit:
The output relays de­energise and the safety contacts open.