Pilz PNOZ 11 Data Sheet
E-STOP relay, safety gate monitor
Up to Category 4, EN 954-1
PNOZ 11
Safety relay for monitoring E-STOP
pushbuttons and safety gates.
Approvals
PNOZ 11
Unit features
` Positive-guided relay outputs:
– 7 safety contacts (N/O), instanta-
neous
– 1 auxiliary contact (N/C), instan-
taneous
` Connection options for:
– E-STOP pushbutton
– Safety gate limit switch
– Reset button
` LED indicator for:
– Switch status channel 1/2
– Supply voltage
– Reset circuit
– Input circuits
` Semiconductor output signals:
– Switch status channel 1/2
– Supply voltage is present
` See order reference for unit types
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
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 tranformer is short circuit-
proof.
Block diagram
B1 B2 13 23 33 43
=
=
A1 A2 Y1 Y2
Power
S11 S12 S21 S22
=
Feed-
back
~
S31 S32
InputInput
0 V 24 V
Y30 Y31 Y32 Y35
Input
Reset/
Start
S37S33 S34
Reset/
Start
K1
K2
14 24 34 44
53 63 73 81
54 64 74 82
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-2-058-12/04
E-STOP relay, safety gate monitor
Up to Category 4, EN 954-1
PNOZ 11
Function description
` Single-channel operation: no red-
undancy in the input circuit, earth
faults in the reset circuit are detected.
` Dual-channel operation with detec-
tion of shorts across contacts: redundant input circuit, detects
– earth faults in the reset and input
circuit,
Timing diagram
1 2
POWER
Reset/Start
Input
Output safe
Output aux.
Out semi RUN
Out semi CH
t1 t2
t1 t2
– short circuits in the input circuit
and, with a monitored reset, in
the reset circuit too,
– shorts between contacts in the
input circuit.
` 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.
` M on it or ed re se t: Un i t i s ac ti ve on c e
ab
t1
t1
t2
– the input circuit is closed and
then the reset circuit is closed
and opened again.
– the reset circuit is closed and
then opened again once the input circuit is closed.
` Increase in the number of available
contacts by connecting contact expander modules or external contactors/relays.
ab
t2
t1
3
t2
t1
t2
Key
` Power: Supply voltage
` Reset/start: Reset circuit S33-S34,
S34-S37
` Input: Input circuits S11-S12, S21-
S22, S31-S32
` Output safe: Safety contacts 13-14,
23-24, 33-34, 43-44, 53-54, 63-64,
73-74
Wiring
Please note:
` Information given in the “Technical
details” must be followed.
` Outputs 13-14, 23-24, 33-34, 43-
44, 53-54, 63-64, 73-74 are safety
contacts, output 81-82 is an 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
R
lmax
=
I
max
Rl / km
` Output aux: Auxiliary contacts 81-
82
` Out semi RUN: Semiconductor out-
put supply voltage Y35
` Out semi CH: Semiconductor out-
put switch status Y32
` c: Automatic reset
` d: Manual reset
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.
` e: Monitored reset
` a: Input circuit closes before reset
circuit
` b: Reset circuit closes before input
circuit
: Switch-on delay
` t
1
` t2: Delay-on de-energisation
Telephone: +49 711 3409-0, Telefax: +49 711 3409-133, E-Mail: pilz.gmbh@pilz.de
NSG-D-2-058-12/04Pilz GmbH & Co. KG, Sichere Automation, Felix-Wankel-Straße 2, 73760 Ostfildern, Germany
-2
E-STOP relay, safety gate monitor
Up to Category 4, EN 954-1
PNOZ 11
Preparing for operation
` Supply voltage
Supply voltage AC DC
A1
A2
B2 PE
L1
N
` Input circuit
Input circuit Single-channel Dual-channel
E-STOP
without detection of shorts across
contacts
S21
S22
S12
S11
S32
S31
S1
E-STOP
with detection of shorts across contacts
S11
S12
Safety gate
without detection of shorts across
contacts
S21
S22
S12
S11
S32
S31
S1
B1
B2
S22
S32
S31
S21
L+
L-
S1
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
S11
S12
S22
S21
S32
S31
S1
NSG-D-2-058-12/04
S2
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