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PNOZ s2
Safety relays
Operating Manual-21394-EN-07
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Preface
This document is the original document.
All rights to this documentation are reserved by Pilz GmbH & Co. KG. Copies may be made
for internal purposes. Suggestions and comments for improving this documentation will be
gratefully received.
Pilz®, PIT®, PMI®, PNOZ®, Primo®, PSEN®, PSS®, PVIS®, SafetyBUS p®, SafetyEYE®,
SafetyNET p®, the spirit of safety® are registered and protected trademarks of Pilz GmbH
& Co. KG in some countries.
SD means Secure Digital
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PNOZ s2
PNOZ s2 safety relay
The safety relay provides a safety-related interruption of a safety circuit.
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
For your safety
} Only install and commission the unit if you have read and understood these operating
instructions and are familiar with the applicable regulations for health and safety at work
and accident prevention.
Ensure VDE and local regulations are met, especially those relating to safety.
} Any guarantee is rendered invalid if the housing is opened or unauthorised modifica-
tions are carried out.
Unit features
} Positive-guided relay outputs:
– 3 safety contacts (N/O), instantaneous
– 1 auxiliary contact (N/C), instantaneous
} Safe separation of safety contacts from all other circuits
} 1 semiconductor output
} Connection options for:
– E-STOP pushbutton
– Safety gate limit switch
– Start button
} A connector can be used to connect 1 PNOZsigma contact expansion module
} Operating modes can be set via rotary switch
} LED indicator for:
– Supply voltage
– Input status, channel 1
– Input status, channel 2
– Switch status of the safety contacts
} Plug-in connection terminals (either spring-loaded terminal or screw terminal)
Operating Manual PNOZ s2
21394-EN-07
– Start circuit
– Errors
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PNOZ s2
Safety features
The relay meets the following safety requirements:
} The circuit is redundant with built-in self-monitoring.
} The safety function remains effective 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/terminal configuration
A1 A2
13
23 33 41
Input
Power
Reset/
Start
S34
Centre: Front view with cover, right: Front view without cover
*Safe separation in accordance with EN 60947-1, 6 kV
Function description
} Single-channel operation: no redundancy in the input circuit, earth faults in the reset
and input circuit are detected.
Y32
K1
K2
14
Interface
24 34 42
unit
expansion
}
} Manual start: Unit is active once the input circuit is closed and then the start circuit is
}
}
} Increase in the number of available instantaneous safety contacts by connecting con-
Operating Manual PNOZ s2
21394-EN-07
Automatic start: Unit is active once the input circuit has been closed.
closed.
Monitored start with falling edge: Unit is active once
– the input circuit is closed and then the start circuit is closed and opened again.
– the start circuit is closed and then opened again once the input circuit is closed.
Monitored start with rising edge: Unit is active once the input circuit is closed and
once the start circuit is closed after the waiting period has elapsed (see technical details).
tact expander modules or external contactors/relays;
A connector can be used to connect 1 PNOZsigma contact expander module.
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PNOZ s2
Installation
Install base unit without contact expansion module:
} Ensure that the plug terminator is inserted at the side of the unit.
Connect base unit and PNOZsigma contact expansion module:
} Remove the plug terminator at the side of the base unit and at the contact expansion
module.
} Connect the base unit and the contact expansion module to the supplied connector be-
fore mounting the units to the DIN rail.
Installation in control cabinet
} The safety relay 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 (35 mm).
} When installed vertically: Secure the unit by using a fixing element (e.g. retaining brack-
et or end angle).
} Push the device upwards or downwards before lifting it from the DIN rail.
Wiring
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).
} Auxiliary contact 41-42 and semiconductor output Y32 should not be used for safety
circuits!
} To prevent contact welding, a fuse should be connected before the output contacts (see
technical details).
} Calculation of the max. cable length l
R
= max. overall cable resistance (see technical details)
lmax
/ 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 in-
ductive loads.
in the input circuit:
max
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PNOZ s2
Preparing for operation
Operating modes
The operating mode is set via the rotary switch on the unit. You can do this by opening the
cover on the front of the unit.
CAUTION!
Do not adjust the rotary switch during operation, otherwise an error message will appear, the safety contacts will open and the unit will not be ready
for operation until the supply voltage has been switched off and then on
again.
Set operating modes
} Switch off supply voltage.
} Select operating mode via the operating mode selector switch "mode".
} If the operating mode selector switch "mode" is in its start position (vertical position), an
error message will appear.
Operating mode selector switch "mode"
Automatic/manual
start
Monitored start rising
edge
without detection of
shorts across contacts
Connection
} Supply voltage
Supply voltage AC DC
Monitored start falling
edge
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PNOZ s2
} Input circuit
Input circuit Single-channel Dual-channel
Emergency stop
without detection of shorts
across contacts
Safety gate
without detection of shorts
across contacts
} Start circuit/feedback loop
Start circuit/feedback loop Start circuit Feedback loop
Automatic start
Manual/monitored start
} Semiconductor output
*Connect together the 0V connections on all the external power supplies
Information
If a base unit and a contact expansion module from the PNOZsigma range
are connected via the connector, no additional wiring is necessary.
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PNOZ s2
Operation
The unit is ready for operation when the Power LED is permanently lit.
LEDs indicate the status and errors during operation:
LED on
LED flashes
Information
Status indicators and error indicators may occur independently. In the case
of an error display, the "Fault" LED will light or flash (exception: "Supply
voltage too low"). An LED that is also flashing indicates the potential cause
of the error. An LED that is lit and is static indicates a normal operating status. Several status indicators and error indicators may occur simultaneously.
Status indicators
Power, In1, In2
Input circuit is closed.
Out
Safety contacts are closed and semiconductor output Y32 carries a high signal.
Reset
24 V DC is present at S34.
Error indicators
Fault
Diagnostics: Plug terminator not connected
} Remedy: Insert plug terminator, switch supply voltage off and then on
again.
Fault
Diagnostics: Internal error, unit defective
} Remedy: Switch supply voltage off and then on again, change unit if neces-
sary.
Operating Manual PNOZ s2
21394-EN-07
Power
Diagnostics: Supply voltage too low
} Remedy: Check the supply voltage.
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PNOZ s2
Reset
Fault
Diagnostics: Position of rotary switch is not permitted or rotary switch was adjusted during operation.
} Remedy: Switch supply voltage off and then on again.
Power, In1, In2, Out, Reset, Fault
Diagnostics: The operating mode selector switch "mode" is in its start position
(vertical position)
} Remedy: Switch off the supply voltage and set the required operating mode
on operating mode selector switch "mode".
Faults - malfunctions
} Contact malfunctions: If the contacts have welded, reactivation will not be possible after
the input circuit has opened.
Service life graph
The service life graphs indicate the number of cycles from which failures due to wear must
be expected. The wear is mainly caused by the electrical load; the mechanical load is negligible.
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Example
} Inductive load: 0,2 A
} Utilisation category: AC15
} Contact service life: 2,000,000 cycles
Provided the application requires fewer than 2,000,000 cycles, the PFH value (see technical details) can be used in the calculation.
To increase the service life, sufficient spark suppression must be provided on all output
contacts. With capacitive loads, any power surges that occur must be noted. With contactors, use freewheel diodes for spark suppression.
Technical Details
General 750102 751102
Approvals CCC, CE, GOST, KOSHA, TÜV,
cULus Listed
Electrical data 750102 751102
Supply voltage
Voltage 24 V 24 V
Type DC DC
Voltage tolerance -15 %/+10 % -15 %/+10 %
Output of external power supply
2,0 W 2,0 W
(DC)
Residual ripple DC 20 % 20 %
Continuous duty 100 % 100 %
Max. inrush current impulse
Reset circuit 0,50 A 0,50 A
Feedback loop 0,50 A 0,50 A
Max. overall cable resistance Rlmax
Single-channel at UB DC 30 Ohm 30 Ohm
Voltage at
Input circuit DC 24,0 V 24,0 V
Reset circuit DC 24,0 V 24,0 V
Feedback loop DC 24,0 V 24,0 V
Current at
Input circuit DC 75,0 mA 75,0 mA
Reset circuit DC 7,0 mA 7,0 mA
Feedback loop 7,0 mA 7,0 mA
Number of output contacts
Instantaneous safety contacts
3 3
(N/O)
Auxiliary contacts (N/C) 1 1
Inputs 750102 751102
Number 1 1
CCC, CE, GOST, KOSHA, TÜV,
cULus Listed
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Semiconductor outputs 750102 751102
Number 1 1
Voltage 24,0 V 24,0 V
Current 20 mA 20 mA
Relay outputs 750102 751102
Max. short circuit current IK 1 kA 1 kA
Utilisation category
In accordance with the standard EN 60947-4-1 EN 60947-4-1
Auxiliary contacts, AC1 at 240 V 240 V
Min. current 0,01 A 0,01 A
Max. current 6,0 A 6,0 A
Max. power 1500 VA 1500 VA
Auxiliary contacts, DC1 at 24 V 24 V
Min. current 0,01 A 0,01 A
Max. current 6,0 A 6,0 A
Max. power 150 W 150 W
Safety contacts, AC1 at 240 V 240 V
Max. current 6,0 A 6,0 A
Min. current 0,01 A 0,01 A
Max. power 1500 VA 1500 VA
Safety contacts, DC1 at 24 V 24 V
Max. current 6,0 A 6,0 A
Min. current 0,01 A 0,01 A
Max. power 150 W 150 W
Utilisation category
In accordance with the standard EN 60947-5-1 EN 60947-5-1
Auxiliary contacts, AC15 at 230 V 230 V
Max. current 5,0 A 5,0 A
Auxiliary contacts, DC13 (6 cy-
24 V 24 V
cles/min) at
Max. current 5,0 A 5,0 A
Safety contacts, AC15 at 230 V 230 V
Max. current 5,0 A 5,0 A
Safety contacts, DC13 (6 cycles/
24 V 24 V
min) at
Max. current 5,0 A 5,0 A
Contact fuse protection, external
safety contacts
In accordance with the standard EN 60947-5-1 EN 60947-5-1
Blow-out fuse, quick 10 A 10 A
Blow-out fuse, slow 6 A 6 A
Circuit breaker, 24V AC/DC,
6 A 6 A
characteristic B/C
Contact fuse protection, external
auxiliary contacts
Blow-out fuse, quick 10 A 10 A
Blow-out fuse, slow 6 A 6 A
Circuit breaker, 24 V AC/DC,
6 A 6 A
characteristic B/C
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Relay outputs 750102 751102
Contact material AgCuNi + 0,2 µm Au AgCuNi + 0,2 µm Au
Conventional thermal current
750102 751102
while loading several contacts
Ith per contact at UB DC
Conv. therm. current with 1 con-
6,00 A 6,00 A
tact
Conv. therm. current with 2 con-
6,00 A 6,00 A
tacts
Conv. therm. current with 3 con-
5,00 A 5,00 A
tacts
Times 750102 751102
Switch-on delay
With automatic reset typ. 75 ms 75 ms
With automatic reset max. 250 ms 250 ms
With automatic reset after power
75 ms 75 ms
on typ.
With automatic reset after power
250 ms 250 ms
on max.
With manual reset typ. 75 ms 75 ms
With manual reset max. 250 ms 250 ms
With monitored reset with rising
75 ms 75 ms
edge typ.
With monitored reset with rising
250 ms 250 ms
edge max.
With monitored reset with falling
55 ms 55 ms
edge typ.
With monitored reset with falling
70 ms 70 ms
edge max.
Delay-on de-energisation
With E-STOP typ. 50 ms 50 ms
With E-STOP max. 70 ms 70 ms
With power failure typ. 50 ms 50 ms
With power failure max. 70 ms 70 ms
Recovery time at max. switching
frequency 1/s
After E-STOP 100 ms 100 ms
After power failure 100 ms 100 ms
Waiting period with a monitored reset
With rising edge 100 ms 100 ms
With falling edge 110 ms 110 ms
Min. start pulse duration with a
monitored reset
With rising edge 100 ms 100 ms
With falling edge 100 ms 100 ms
Supply interruption before de-ener-
10 ms 10 ms
gisation
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Environmental data 750102 751102
Climatic suitability EN 60068-2-78 EN 60068-2-78
Ambient temperature
Temperature range -10 - 55 °C -10 - 55 °C
Storage temperature
Temperature range -40 - 85 °C -40 - 85 °C
EMC EN 60947-5-1, EN 61000-6-2, EN
61000-6-4
EN 60947-5-1, EN 61000-6-2, EN
61000-6-4
Vibration
In accordance with the standard EN 60068-2-6 EN 60068-2-6
Frequency 10,0 - 55,0 Hz 10,0 - 55,0 Hz
Max. amplitude 0,35 mm 0,35 mm
Airgap creepage
In accordance with the standard EN 60947-1 EN 60947-1
Overvoltage category III III
Pollution degree 2 2
Rated insulation voltage 250 V 250 V
Rated impulse withstand voltage 6,00 kV 6,00 kV
Protection type
Mounting (e.g. cabinet) IP54 IP54
Housing IP40 IP40
Terminals IP20 IP20
Mechanical data 750102 751102
Mounting position Any Any
Mechanical life 10,000,000 cycles 10,000,000 cycles
Material
Bottom PC PC
Front PC PC
Top PC PC
Cross section of external conduc-
tors with screw terminals
1 core flexible 0,25 - 2,50 mm², 24 - 12 AWG –
2 core with the same cross sec-
0,25 - 1,00 mm², 24 - 16 AWG –
tion, flexible with crimp connec-
tors, no plastic sleeve
2 core with the same cross sec-
0,20 - 1,50 mm², 24 - 16 AWG –
tion, flexible without crimp con-
nectors or with TWIN crimp con-
nectors
Torque setting with screw terminals 0,50 Nm –
Connection type Screw terminal Spring-loaded terminal
Mounting type plug in plug in
Cross section of external conduc-
– 0,20 - 2,50 mm², 24 - 12 AWG
tors with spring-loaded terminals:
flexible with/without crimp connector
Spring-loaded terminals: Terminal
– 2
points per connection
Stripping length – 9 mm
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Mechanical data 750102 751102
Dimensions
Height 98,0 mm 100,0 mm
Width 17,5 mm 17,5 mm
Depth 120,0 mm 120,0 mm
Weight 175 g 175 g
The standards current on 2009-12 apply.
Safety characteristic data
Operating
mode
Safety contacts, instantaneous
EN ISO
13849-1:
2006
PL
EN ISO
13849-1:
2006
Category
EN IEC
62061
SIL CL
EN IEC
62061
[1/h]
PFH
D
IEC 61511
SIL
IEC 61511
PFD
EN ISO
13849-1:
2006
T
M
PL e Cat. 4 SIL CL 3 2,50E-09 SIL 3 2,13E-05 20
All the units used within a safety function must be considered when calculating the safety
characteristic data.
Information
A safety function's SIL/PL values are not identical to the SIL/PL values of
the units that are used and may be different. We recommend that you use
the PAScal software tool to calculate the safety function's SIL/PL values.
ATTENTION!
It is essential to consider the relay's service life graphs. The relay outputs'
safety-related characteristic data is only valid if the values in the service life
graphs are met.
[year]
The PFH value depends on the switching frequency and the load on the relay output. If the
service life graphs are not accessible, the stated PFH value can be used irrespective of the
switching frequency and the load, as the PFH value already considers the relay's B10d value as well as the failure rates of the other components.
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PNOZ s2
Order reference
Order reference
Product type Features
PNOZ s2 24 V DC
PNOZ s2 C 24 V DC
Terminals
Screw terminals 750 102
Spring-loaded terminals 751 102
EC declaration of conformity
This product/these products meet the requirements of the directive 2006/42/EC for machinery of the European Parliament and of the Council. The complete EC Declaration of Conformity is available on the Internet at www.pilz.com/downloads.
Representative: Norbert Fröhlich, Pilz GmbH & Co. KG, Felix-Wankel-Str. 2, 73760 Ostfildern, Germany
Order
no.
Operating Manual PNOZ s2
21394-EN-07
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© Pilz GmbH & Co. KG, 2011
of the equipment. We accept no responsibility for the validity, accuracy and entirety of the text and graphics presented in this information. Please contact our Technical Support if you have any questions.
Back cover
Sachnummer Printed in Germany
21394-EN-07, 2013-05 Printed in Germany
© Pilz GmbH & Co. KG, 2011
...
In many countries we are
represented by our subsidiaries
and sales partners.
Please refer to our homepage
for further details or contact our
headquarters.
Technical support
+49 711 3409-444
support@pilz.com
are registered and protected trademarks
®
, the spirit of safety
®
, SafetyNET p
®
, SafetyEYE
®
, SafetyBUS p
®
, PVIS
®
, PSS
®
, PSEN
®
, Primo
®
, PNOZ
®
, PMI
®
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
Internet: www.pilz.com
, PMCprotego
®
, PIT
®
, Pilz
®
of Pilz GmbH & Co. KG in some countries. We would point out that product features may vary from the details stated in this document, depending on the status at the time of publication and the scope
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