Pilz PNOZ s4 Data Sheet
E-STOP relays, safety gate monitors
Up to PL e of EN ISO 13849-1
PNOZ s4
Gertebild
][Bildunterschrift_NOT_Sch.tuer_Licht
Safety relay for monitoring E-STOP
pushbuttons, safety gates and light
beam devices
Approvals
PNOZ s4
SÜDDEUTSCHLAND
Unit features
Gertemerkmale
` Positive-guided relay outputs:
– 3 safety contacts (N/O), instanta-
neous
– 1 auxiliary contact (N/C), instan-
taneous
` 1 semiconductor output
` Connection options for:
– E-STOP pushbutton
– Safety gate limit switch
– Reset button
– Light barriers
– PSEN
` A connector can be used to con-
nect 1 PNOZsigma contact expander module
` Operating modes can be set via ro-
tary switch
` LED indicator for:
– Supply voltage
– Input status, channel 1
– Input status, channel 2
– Switch status, safety contacts
– Reset circuit
– Error
` Plug-in connection terminals (either
spring-loaded terminal or screw
terminal)
Unit description
Bestimmung/Gertebeschreibung NOT-AUS, Schutzt, Lichtschr_PNOZ
The safety relay meets the requirements of EN 60947-5-1, EN 60204-1
and VDE 0113-1 and may be used in
applications with
` E-STOP pushbuttons
` Safety gates
` Light beam devices
Safety features
][Sicherheitseigenscha ften Schaltgerät_allgem einer Teil
The relay meets the following safety
requirements:
` The circuit is redundant with built-in
self-monitoring.
` The safety function remains effec-
tive 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.
Sicherheitseigenschaften Zusatz - Sicherung DC_PNOZ
` The unit has an electronic fuse.
Zulassungen
Block diagram
A1 A2 S21 S22
=
(~)*
Power
* only when UB = 48 – 240 VAC/DC
Blockschaltbild
Zusatz WSNT
=
( )*
S11 S12
Reset/
Start
S34
41
23 33
13
InputInput
K1
unit
Interface
expansion
Y32
K2
14
24 34
42
Pilz GmbH & Co. KG, Felix-Wankel-Straße 2, 73760 Ostfildern, Germany
Telephone: +49 711 3409-0, Telefax: +49 711 3409-133, E-Mail: pilz.gmbh@pilz.de
1001742-EN-03-2010-11
E-STOP relays, safety gate monitors
Up to PL e of EN ISO 13849-1
PNOZ s4
Function description
][Funktionen_einkanalig
` Single-channel operation: no re-
dundancy in the input circuit, earth
faults in the reset and input circuit
are detected.
][Funktionen_zweikanalig_ohne_quer
` Dual-channel operation without de-
tection of shorts across contacts:
redundant input circuit, detects
– earth faults in the reset and input
circuit,
– short circuits in the input circuit
and, with a monitored reset, in
the reset circuit too.
][Funktionen_zweikanalig_mit_quer_ber
` Dual-channel operation with detec-
tion of shorts across contacts: redundant input circuit, detects
– earth faults in the reset and input
Timing diagram
1 2
POWER
Reset/Start
Input
Output safe
Output aux.
Out semi
t1 t2
t1 t2
circuit,
– short circuits in the input circuit
and, with a monitored reset, in
the reset circuit too,
– shorts between contacts in the
input circuit.
][Funktionen_autoStart
` Automatic start: Unit is active once
the input circuit has been closed.
][Funktionen_manuStart
` Manual reset: Unit is active once
the input circuit is closed and then
the reset circuit is closed.
][Funktionen_berStart_fall_Flanke
` Monitored reset with falling edge:
Unit is active once
– 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 in-
][Zeitdiagramm_PNOZs_auto_manu_ueber1_ueber2_aux_Semi
ab
t3
t1
t2
t1
t2
t1
put circuit is closed.
][Funktionen_berStart_steig_Flanke
` Monitored reset with rising edge:
Unit is active once the input circuit
is closed and once the reset circuit
is closed after the waiting period
has elapsed (see technical details).
][Funktionen_Start_Anlauftest
` Reset with start-up test: The unit
checks whether safety gates that
are closed are opened and then
closed again when supply voltage
is applied.
][Funktionen_Kontaktvervielfachung_PNOZsigma
` Increase in the number of available
instantaneous safety contacts by
connecting contact expander modules or external contactors/relays;
A connector can be used to connect 1 PNOZsigma contact expander module.
3
ab
t3
t2
t4
t1
4
ab
t1
t2
t2
Key
` Power: Supply voltage
` Reset/start: Reset circuit S34 S34
` Input: Input circuits S11-S12, S21-
S22
` Output safe: Safety contacts 13-14,
23-24, 33-34
` Output aux: Auxiliary contacts 41-
42
` Out semi: Semiconductor output
Y32
` c: Automatic reset
` d: Manual reset
` e: Monitored reset with rising edge
` f: Monitored reset with falling edge
` a: Input circuit closes before reset
circuit
Wiring
][Verdrahtung_Si_unverz_1Hi_unverz
Please note:
` Information given in the “Technical
details” must be followed.
` Outputs 13-14, 23-24, 33-34 are
safety contacts, output 41-42 is an
auxiliary contact (e.g. for display).
` To prevent contact welding, a fuse
should be connected before the
output contacts (see technical details).
` Use copper wire that can withstand
` Sufficient fuse protection must be
` Calculation of the max. cable runs
in the input circuit:
l
max
Telephone: +49 711 3409-0, Telefax: +49 711 3409-133, E-Mail: pilz.gmbh@pilz.de
R
lmax
=
I
max
Rl / km
R
= max. overall cable resist-
lmax
ance (see technical details)
/km = cable resistance/km
R
l
60/75 °C.
provided on all output contacts with
capacitive and inductive loads.
` b: Reset circuit closes before input
circuit
: Switch-on delay
` t
1
: Delay-on de-energisation
` t
2
: Waiting period
` t
3
: Waiting period reset circuit was
` t
4
closed
1001742-EN-03-2010-11Pilz GmbH & Co. KG, Felix-Wankel-Straße 2, 73760 Ostfildern, Germany
-2
E-STOP relays, safety gate monitors
Up to PL e of EN ISO 13849-1
PNOZ s4
Preparing for operation
Betriebsbereitschaft herstellen PNOZs
` Supply voltage
Supply voltage AC DC
L
N
S21
A1
A2
` Input circuit
Input circuit Single-channel Dual-channel
E-STOP
without detection of shorts across contacts
E-STOP
with detection of shorts across contacts
S11
S12
S22
S1
A1
A2
S11
S12
S22
S11
S21
S22
S12
L+
L-
S1
S1
Safety gate
without detection of shorts across contacts
Safety gate
with detection of shorts across contacts
Light beam device or safety switch with
detection of shorts across contacts via
ESPE
(only when U
= 24 VDC)
B
S11
S12
S22
S1
A2
S11
S12
S22
S11
S12
S21
S22
S12
S22
S1
S1
S2
S2
24 V DC
GND
Pilz GmbH & Co. KG, Felix-Wankel-Straße 2, 73760 Ostfildern, Germany
Telephone: +49 711 3409-0, Telefax: +49 711 3409-133, E-Mail: pilz.gmbh@pilz.de
1001742-EN-03-2010-11
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