Datasheet

Relays for functional safety
Safety relays PNOZ X
PZE X4P
Pilz GmbH & Co. KG, Felix-Wankel-Straße 2, 73760 Ostfildern, Germany
Telephone: [phone], Telefax: [phone], E-Mail: [e-mail]
2016-09
410
Function description
The contact expansion module PZE X4P is an add-on device without delay-on de-energisa-
tion, and it is used to expand a safety circuit. The contact expansion module is driven by a
base unit (e. g. emergency stop relay).
} Functional procedure once the input circuit is closed (e.g. safety contacts on the base
unit are closed):
– The supply voltage is present at input (A1) of the contact expansion module.
– The safety contacts 13-14, 23-24, 33-34 and 43-44 close.
– The LEDs "CH.1" and "CH.2" are lit.
} Functional procedure once the input circuit is opened (e.g. safety contacts on the base
unit are opened):
– The supply voltage is not present at input (A1) of the contact expansion module.
– Safety contacts 13-14, 23-24, 33-34 and 43-44 are opened redundantly.
– The LEDs "CH.1" and "CH.2" go out.
Installation
} The unit 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.
} Ensure the unit is mounted securely on a vertical DIN rail (35 mm) by using a fixing ele-
ment (e.g. retaining bracket or an end angle).
} If more than 2 units are installed next to each other in the control cabinet, leave a dis-
tance of at least 6 mm between the units.
Wiring
Please note:
} Information given in the "Technical details [ 412]" must be followed.
} The outputs 13-14, 23-24, 33-34 and 43-44 are safety contacts.
} To prevent contact welding, a fuse should be connected before the output contacts (see
Technical details [ 412]).
} Calculation of the max. cable length l
max
in the input circuit:
R
lmax
R
l
/ km
I
max
=
R
lmax
= max. overall cable resistance (see Technical details [ 412])
R
l
/km = cable resistance/km
} Use copper wire that can withstand 60/75°C.
} Sufficient fuse protection must be provided on all output contacts with capacitive and in-
ductive loads.