Pilz PZE X4 Data Sheet
Expander modules
Instantaneous
PZE X4
Contact expander module for increasing the number of available contacts
Approvals
PZE X4
Unit features
` Positive-guided relay outputs:
– 4 safety contacts (N/O), instanta-
neous
` Safe separation of safety contacts
13-14, 23-24, 33-34 from input circuit A1 and feedback loop Y1-Y2
` Connection for feedback loop
` Switch status channel 1/2
` See order reference for unit types
Unit description
The unit meets the requirements of EN
60204-1 and IEC 60204-1. The contact expander module is used to increase the number of contacts
available on a base unit. Base units are
all
` Safety relays with feedback loop
` Programmable safety systems with
feedback loop
The category that can be achieved in
accordance with EN 954-1 depends
on the category of the base unit. The
contact expander module may not exceed this.
Safety features
The unit meets the following safety requirements:
` The contact expander module ex-
pands 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 effec-
tive 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 de-energise and
the safety contacts open.
Block diagram
* Safe separation in accordance with EN 60947-1, 6 kV (see unit features)
A1 A2 17 27 37
A1 A2 17 27 37
=
=
Input
Input
=
Power
Power
=
K1
K1
K2
K2
Y1
Y1
Y2
Y2
18 28 38
18 28 38
*
*
47
47
48
48
Pilz GmbH & Co. KG, Sichere Automation, Felix-Wankel-Straße 2, 73760 Ostfildern, Germany
Telephone: +49 711 3409-0, Telefax: +49 711 3409-133, E-Mail: pilz.gmbh@pilz.de
NSG-D-2-091-2006-10
Expander modules
Instantaneous
PZE X4
Function description ` Single-channel operation: one in-
put circuit affects both output re-
lays
Timing diagram
POWER
Input
Output safe
Feedback
t1 t1t2 t2
Key
` Power: Supply voltage
` Input: Input circuits A1
` Output safe: Safety contacts 13-14,
23-24, 33-34, 43-44
` Feedback: Feedback loop Y1-Y2
: Switch-on delay
` t
1
: Delay-on de-energisation
` t
2
Wiring
Please note:
` Information given in the “Technical
details” must be followed.
` Outputs 13-14, 23-24, 33-34, 43-44
are safety contacts.
` To prevent contact welding, a fuse
should be connected before the
output contacts (see technical details).
` Calculation of the max. cable runs
in the input circuit:
l
max
R
lmax
=
I
max
Rl / km
= max. overall cable resist-
R
lmax
ance (see technical details)
/km = cable resistance/km
R
l
` Use copper wire that can withstand
60/75 °C.
` Sufficient fuse protection must be
provided on all output contacts with
capacitive and inductive loads.
Telephone: +49 711 3409-0, Telefax: +49 711 3409-133, E-Mail: pilz.gmbh@pilz.de
NSG-D-2-091-2006-10Pilz GmbH & Co. KG, Sichere Automation, Felix-Wankel-Straße 2, 73760 Ostfildern, Germany
-2
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