Pilz PZV Data Sheet
E-STOP relays, safety gate monitors
Category 4, EN 954-1
PNOZ 2VQ
Safety relay for monitoring E-STOP
pushbuttons and safety gates.
Approvals
PNOZ 2VQ
Unit features
` Positive-guided relay outputs:
– 3 safety contacts (N/O), instanta-
neous
– 2 safety contacts (N/O), delay-on
de-energisation
– 1 auxiliary contact (N/C), instan-
taneous
` Connection options for:
– E-STOP pushbutton
– Safety gate limit switch
– Reset button
` Delay-on de-energisation can be
set separately for both safety contacts with delay-on de-energisation
` Delay time can be cancelled via re-
set button
` LED indicator for:
– Switch status channel 1/2
– Supply voltage
Unit description
The safety relay meets the requirements of EN 60204-1 and IEC 602041 and may be used in applications with
` E-STOP pushbuttons
` Safety gates
The max. category the safety contacts
can achieve in accordance with EN
954-1 is stated in the technical details.
Safety features
The relay conforms to the following
safety criteria:
` The circuit is redundant with built-in
self-monitoring.
` The safety function remains effecti-
ve in the case of a component failure.
` The correct opening and closing of
the safety function relays is tested
automatically in each on-off cycle.
` The unit has an electronic fuse.
Block diagram
A1 A2
~
Power
Power
=
S11 S12
Feed-
back
Y1 Y2
S21 S22
InputInput
Reset/
Start
S12 S33
Y36 S52
Input
S34
Y39 Y40
Reset
t
K3
K1
K4
K2
13 23 33
14 24 34
41
42
57 67
58 68
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-2-063-01/05
E-STOP relays, safety gate monitors
Category 4, EN 954-1
PNOZ 2VQ
Function description
` Single-channel operation: no red-
undancy in the input circuit, earth
faults in the reset and input circuit
are detected.
` Dual-channel operation without de-
tection of shorts across contacts:
redundant input circuit, detects
– earth faults in the reset and input
circuit,
Timing diagram
POWER
Reset/Start
Reset t
v
Input
Output safe
Output aux
Output safe del
– short circuits in the input circuit
and, with a monitored reset, in
the reset circuit too.
` Dual-channel operation with detec-
tion of shorts across contacts: redundant input circuit, detects
– earth faults in the reset and input
circuit,
– short circuits and shorts bet-
ween contacts in the input circuit.
1 2
t1 t2 t3 t2
t1
t3
t1
` Automatic start: Unit is active once
the input circuit has been closed.
` Manual reset: Unit is active once
the input circuit is closed and then
the reset circuit is closed.
` Increase in the number of available
contacts by connecting contact expander modules or external contactors/relays.
ab
t2
t2t1t3 t3
Key
` Power: Supply voltage
` Reset/start: Reset circuit S12, S33,
S34
` Reset t
: Y39-Y40
v
` Input: Input circuits S11-S12, S21-
S22, Y36-S52
` Output safe: Safety contacts 13-14,
23-24, 33-34
Wiring
Please note:
` Information given in the “Technical
details” must be followed.
` Outputs 13-14, 23-24, 33-34 are in-
stantaneous safety contacts, outputs 57-58, 67-68 are delay-on deenergisation safety contacts, output 41-42 is an instantaneous auxiliary contact (e.g. for display).
` 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
` Output safe del: Safety contacts,
delayed 57-58, 67-68
` Output aux: Auxiliary contacts 41-
42
` c: Automatic reset
` d: Manual reset
` a: Input circuit closes before reset
circuit
R
lmax
=
I
max
Rl / km
R
= max. overall cable resi-
lmax
stance (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.
` b: Reset circuit closes before input
circuit
: Switch-on delay
` t
1
` t2: Delay-on de-energisation inst.
contacts
: Delay time
` t
3
Telephone: +49 711 3409-0, Telefax: +49 711 3409-133, E-Mail: pilz.gmbh@pilz.de
NSG-D-2-063-01/05Pilz GmbH & Co. KG, Sichere Automation, Felix-Wankel-Straße 2, 73760 Ostfildern, Germany
-2
E-STOP relays, safety gate monitors
Category 4, EN 954-1
PNOZ 2VQ
Preparing for operation
` Supply voltage
Supply voltage AC DC
` Input circuit
Input circuit Single-channel Dual-channel
E-STOP
without detection of shorts across
contacts
S21
S22
S11
S12
S52
S1
S21
S22
E-STOP
with detection of shorts across contacts
Y36
S52
Safety gate
without detection of shorts across
contacts
S21
S22
S11
S12
S52
S1
S21
S22
S11
S12
S52
A1
A2
S11
S21
S22
S12
S11
S12
S52
S1
L+
L-
S1
S1
S2
Safety gate
with detection of shorts across contacts
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
Y36
S52
S11
S12
S21
S22
S1
NSG-D-2-063-01/05
S2
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