Pilz PNOZ 15 User manual

PNOZ 15
Operating Manual-18492-EN-04
}Safety relays

Preface
This document is the original document.
All rights to this documentation are reserved by Pilz GmbH & Co. KG. Copies may be made
for the user's internal purposes. Suggestions and comments for improving this documenta-
tion will be gratefully received.
Source code from third-party manufacturers or open source software has been used for
some components. The relevant licence information is available on the Internet on the Pilz
homepage.
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

Contents
Operating Manual PNOZ 15
18492-EN-04 3
Introduction 4
Validity of documentation 4
Using the documentation 4
Definition of symbols 4
Safety 5
Intended use 5
Safety regulations 5
Safety assessment 5
Use of qualified personnel 6
Warranty and liability 6
Disposal 6
For your safety 6
Unit features 7
Safety features 7
Block diagram/terminal configuration 7
Function Description 8
Operating modes 8
Timing diagram 9
Installation 9
Wiring 10
Preparing for operation 11
Operation 13
Status indicators 13
Faults – Interference 14
Dimensions in mm 14
Technical details 14
Safety characteristic data 18
Supplementary data 18
Service life graph 19
Order reference 19
EC declaration of conformity 19

PNOZ 15
Operating Manual PNOZ 15
18492-EN-04 4
Introduction
Validity of documentation
This documentation is valid for the product PNOZ 15. It is valid until new documentation is
published.
This operating manual explains the function and operation, describes the installation and
provides guidelines on how to connect the product.
Using the documentation
This document is intended for instruction. Only install and commission the product if you
have read and understood this document. The document should be retained for future ref-
erence.
Definition of symbols
Information that is particularly important is identified as follows:
DANGER!
This warning must be heeded! It warns of a hazardous situation that poses
an immediate threat of serious injury and death and indicates preventive
measures that can be taken.
WARNING!
This warning must be heeded! It warns of a hazardous situation that could
lead to serious injury and death and indicates preventive measures that can
be taken.
CAUTION!
This refers to a hazard that can lead to a less serious or minor injury plus
material damage, and also provides information on preventive measures
that can be taken.
NOTICE
This describes a situation in which the product or devices could be dam-
aged and also provides information on preventive measures that can be
taken. It also highlights areas within the text that are of particular import-
ance.

PNOZ 15
Operating Manual PNOZ 15
18492-EN-04 5
INFORMATION
This gives advice on applications and provides information on special fea-
tures.
Safety
Intended use
The safety relay PNOZ 15 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
The following is deemed improper use in particular
}Any component, technical or electrical modification to the product,
}Use of the product outside the areas described in this manual,
}Use of the product outside the technical details (see Technical details [ 14]).
NOTICE
EMC-compliant electrical installation
The product is designed for use in an industrial environment. The product
may cause interference if installed in other environments. If installed in other
environments, measures should be taken to comply with the applicable
standards and directives for the respective installation site with regard to in-
terference.
Safety regulations
Safety assessment
Before using a device it is necessary to perform a safety assessment in accordance with
the Machinery Directive.
Functional safety is guaranteed for the product as a single component. However, this does
not guarantee the functional safety of the overall plant/machine. In order to achieve the re-
quired safety level for the overall plant/machine, define the safety requirements for the
plant/machine and then define how these must be implemented from a technical and organ-
isational standpoint.

PNOZ 15
Operating Manual PNOZ 15
18492-EN-04 6
Use of qualified personnel
The products may only be assembled, installed, programmed, commissioned, operated,
maintained and decommissioned by competent persons.
A competent person is a qualified and knowledgeable person who, because of their train-
ing, experience and current professional activity, has the specialist knowledge required. To
be able to inspect, assess and operate devices, systems and machines, the person has to
be informed of the state of the art and the applicable national, European and international
laws, directives and standards.
It is the company’s responsibility only to employ personnel who
}Are familiar with the basic regulations concerning health and safety / accident preven-
tion,
}Have read and understood the information provided in the section entitled Safety
}Have a good knowledge of the generic and specialist standards applicable to the spe-
cific application.
Warranty and liability
All claims to warranty and liability will be rendered invalid if
}The product was used contrary to the purpose for which it is intended,
}Damage can be attributed to not having followed the guidelines in the manual,
}Operating personnel are not suitably qualified,
}Any type of modification has been made (e.g. exchanging components on the PCB
boards, soldering work etc.).
Disposal
}In safety-related applications, please comply with the mission time TM in the safety-re-
lated characteristic data.
}When decommissioning, please comply with local regulations regarding the disposal of
electronic devices (e.g. Electrical and Electronic Equipment Act).
For your safety
The unit meets all the necessary conditions for safe operation. However, please note the
following:
}Note for overvoltage category III: If voltages higher than low voltage (>50 VAC or >120
VDC) are present on the unit, connected control elements and sensors must have a
rated insulation voltage of at least 250 V.

PNOZ 15
Operating Manual PNOZ 15
18492-EN-04 7
Unit features
}Positive-guided relay outputs:
– 3 safety contacts (N/O), instantaneous
}Relay outputs:
– 1 auxiliary contact (N/C), instantaneous
– 1 auxiliary contact (N/O), instantaneous
}1 semiconductor output
}Connection options for:
– E-STOP pushbutton
– Safety gate limit switch
– Start button
}Reset button for resetting after a short circuit
}LED indicator for:
– Supply voltage
– Switch state of the safety contacts
– Error
}Semiconductor output signals:
– Error
Safety features
The safety 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.
Block diagram/terminal configuration
Start
A1 A2 S52 13S22 S33 S34
S21
Feed-
back
23 33 41 53
14 24 34 42 54
Y35
Y31
Y30
5341332313S22S21S12S52S11A1
5442342414Y2Y1S34S33 A2
PNOZ 15
POWER
FAULT
CH.1
Y31
13 23 33
14 24 34
Y35
Y30
CH.2
41 53
42 54
*Insulation between the non-marked area and the relay contacts: Basic insulation (over-
voltage category III), Protective separation (overvoltage category II)

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Operating Manual PNOZ 15
18492-EN-04 8
Function Description
The safety relay PNOZ 15 provides a safety-oriented interruption of a safety circuit. When
supply voltage is supplied the "POWER" LED is lit. The unit is ready for operation when the
feedback loop Y1-Y2 and the start circuit S12-S34 are closed.
}Input circuit is closed (e.g. E-STOP pushbutton not operated):
– The LEDs "CH.1" and "CH.2" are lit.
– Safety contacts 13-14, 23-24, 33-34 and auxiliary contact 53-54 are closed, auxili-
ary contact 41-42 is open. The unit is active.
}Input circuit is opened (e.g. E-STOP pushbutton operated):
– The LEDs "CH.1" and "CH.2" go out.
– Safety contacts 13-14, 23-24, 33-34 and auxiliary contact 53-54 are opened re-
dundantly, auxiliary contact 41-42 is closed.
Semiconductor output fault Y35
}A low signal is present at semiconductor output Y35 if the supply voltage is present and
the internal fuse (thermal circuit breaker) has not blown. If there is a fault on the safety
relay, a high signal is present at Y35, the "FAULT" LED lights. Once the cause of the
fault has been removed, the fuse must be reset via the reset pushbutton.
Operating modes
}Single-channel operation: No redundancy in the input circuit, earth faults in the start
and input circuit are detected.
}Dual-channel operation with detection of shorts across contacts: Redundant input cir-
cuit, PNOZ 15 detects
– earth faults in the start and input circuit,
– short circuits in the input circuit,
– shorts across contacts in the input circuit.
}Dual-channel operation without detection of shorts across contacts: Redundant input
circuit, detects PNOZ 15
– earth faults in the start and input circuit,
– short circuits in the input circuit.
}Automatic start: Unit is active once the input circuit has been closed.
}Manual start: Unit is active once the input circuit and the start circuit are closed.
}Increase in the number of available contacts by connecting contact expander modules
or external contactors/relays.

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Operating Manual PNOZ 15
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Timing diagram
Out semi FAULT
[2][1]
Output aux. N/C
Output aux. N/O
POWER
Start
Input
Output safe
Legend
}Power: Supply voltage
}Start: Start circuit
}Input: Input circuit
}Output safe: Safety contacts
}Output aux. N/C: Auxiliary contact, normally closed
}Output aux. N/O: Auxiliary contact, normally open
}Out semi FAULT: Semiconductor output fault
}[1]: Automatic start
}[2]: Manual start
}a: Input circuit closes before start circuit
}b: Start circuit closes before input circuit
}t1: Switch-on delay
}t2: Delay-on de-energisation
}t3: Recovery time
Installation
}The unit 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
bracket or end angle).

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Wiring
Please note:
}Information given in the "Technical details [ 14]" must be followed.
}Outputs 13-14, 23-24, 33-34 are safety contacts, outputs 41-42, 53-54 are auxiliary
contacts (e.g. for display).
}Do not use auxiliary contacts 41-42, 53-54 and semiconductor output Y35 for safety cir-
cuits!
}Do not connect undesignated terminals.
}To prevent contact welding, a fuse should be connected before the output contacts (see
Technical details [ 14]).
}Calculation of the max. cable length lmax in the input circuit:
Rlmax
Rl / km
Imax =
Rlmax = max. overall cable resistance (see Technical details [ 14])
Rl/km = cable resistance/km
}Use copper wire that can withstand 60/75°C.
}Do not switch low currents using contacts that have been used previously with high cur-
rents.
}Sufficient fuse protection must be provided on all output contacts with capacitive and in-
ductive loads.
}The power supply must comply with the regulations for extra low voltages with protect-
ive electrical separation (SELV, PELV) in accordance with VDE 0100, Part 410.
}Ensure the wiring and EMC requirements of EN 60204-1 are met.
}Terminals S11 and S33, and terminals Y1 and S34 are linked internally and either can
be used.
Important for detection of shorts across contacts:
As this function for detecting shorts across contacts is not failsafe, it is tested by Pilz during
the final control check. If there is a danger of exceeding the cable runs, we recommend the
following test after the installation of the device:
1. Unit ready for operation (output contacts closed)
2. Short circuit the test terminals S12, S22 for detecting shorts across the inputs.
3. The unit's fuse must be triggered and the output contacts must open. Cable lengths in
the scale of the maximum length can delay the fuse triggering for up to 2 minutes.
4. Reset the fuse: remove the short circuit and switch off the supply voltage for approx. 1
minute.

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Operating Manual PNOZ 15
18492-EN-04 11
Preparing for operation
Supply voltage AC DC
A1
A2
L+
L-
Input circuit Single-channel Dual-channel
E-STOP
without detection of shorts
across contacts
S1
S22
S21
S11
S52
S12
S1
S11
S12
S52
S22
S21
E-STOP
with detection of shorts across
contacts
S1
S22
S21
S12
S11
S52
S11
Safety gate
without detection of shorts
across contacts
S1
S22
S21
S11
S52
S12
S1 S2
S22
S21
S11
S12
S52
Safety gate
with detection of shorts across
contacts
NOTICE
With single-channel wiring the safety level of your machine/plant may be
lower than the safety level of the unit (see Safety characteristic
data [ 18]).

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Operating Manual PNOZ 15
18492-EN-04 12
Start circuit
E-STOP wiring/safety gate
(single-channel, dual-channel
without detection of shorts
across contacts)
E-STOP wiring/safety gate (dual-
channel without detection of
shorts across contacts)
Automatic start
Automatic start with start-up test
S2S1
S33
S34
Manual start
S33
S34
S3
NOTICE
In the event of an automatic start or manual start with bridged start
contact (fault):
The unit starts up automatically when the safeguard is reset, e.g. when the
E-STOP pushbutton is released. Use external circuit measures to prevent
an unexpected restart.
Feedback loop
Without feedback loop monit-
oring With feedback loop monitoring
Link or contacts from external
contactors
Semiconductor output
Y31 24 V DC
0 V DC
SPS InputY35
Y30

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18492-EN-04 13
Legend
}S1/S2: E-STOP/safety gate switch
}S3: Reset button
}: Switch operated
}: Gate open
}: Gate closed
Operation
When the relay outputs are switched on, the mechanical contact on the relay cannot be
tested automatically. Depending on the operational environment, measures to detect the
non-opening of switching elements may be required under some circumstances.
When the product is used in accordance with the European Machinery Directive, a check
must be carried out to ensure that the safety contacts on the relay outputs open correctly.
Open the safety contacts (switch off output) and start the device again, so that the internal
diagnostics can check that the safety contacts open correctly
}for SIL CL 3/PL e at least 1x per month
}for SIL CL 2/PL d at least 1x per year
NOTICE
The safety function should be checked after initial commissioning and each
time the plant/machine is changed. The safety functions may only be
checked by qualified personnel.
Status indicators
LEDs indicate the status and errors during operation:
LED on
POWER
Supply voltage is present.
CH.1
Safety contacts of channel 1 are closed.
CH.2
Safety contacts of channel 2 are closed.
FAULT
Short circuit: internal fuse has blown.

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18492-EN-04 14
Faults – Interference
}Earth fault/short circuit
An internal fuse interrupts the supply voltage, the safety contacts are opened and the
"FAULT" LED is lit. Once the cause of the fault has been removed, press the reset but-
ton to reset the fuse.
}Contact malfunctions: If the contacts have welded, reactivation will not be possible after
the input circuit has opened.
}LED "POWER" does not light: Short circuit or no supply voltage.
Dimensions in mm
121 (4.76")
75 (2.95")
87 (3.42")
90 (3.54")
Technical details
General
Approvals CCC, CE, TÜV
Electrical data
Supply voltage
Voltage 24 V
Kind DC
Voltage tolerance -15 %/+10 %
Output of external power supply (DC) 3,5 W
Residual ripple DC 160 %
Duty cycle 100 %
Max. inrush current impulse
Current pulse, A1 11 A
Pulse duration, A1 15 ms
Inputs
Number 2

PNOZ 15
Operating Manual PNOZ 15
18492-EN-04 15
Inputs
Voltage at
Input circuit DC 24 V
Start circuit DC 24 V
Feedback loop DC 24 V
Current at
Input circuit DC 50 mA
Start circuit DC 50 mA
Feedback loop DC 50 mA
Max. inrush current impulse
Current pulse, start circuit 0,95 A
Pulse duration, start circuit 15 ms
Max. overall cable resistance Rlmax
Single-channel at UB DC 100 Ohm
Dual-channel without detection of shorts across
contacts at UB DC 200 Ohm
Dual-channel with detection of shorts across con-
tacts at UB DC 5 Ohm
Semiconductor outputs
Number 1
Voltage 24 V
Current 50 mA
External supply voltage 24 V
Voltage tolerance -30 %/+30 %
Short circuit-proof yes
Relay outputs
Number of output contacts
Safety contacts (N/O), instantaneous 3
Auxiliary contacts (N/C) 1
Auxiliary contacts (N/O) 1
Max. short circuit current IK 1 kA
Utilisation category
In accordance with the standard EN 60947-4-1
Utilisation category of safety contacts
AC1 at 400 V
Min. current 0,01 A
Max. current 5 A
Max. power 2000 VA
AC1 at 240 V
Min. current 0,01 A
Max. current 8 A
Max. power 2000 VA
DC1 at 24 V
Min. current 0,01 A
Max. current 8 A
Max. power 200 W

PNOZ 15
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18492-EN-04 16
Relay outputs
Utilisation category of auxiliary contacts
AC1 at 240 V
Min. current 0,01 A
Max. current 5 A
Max. power 1200 VA
DC1 at 24 V
Min. current 0,01 A
Max. current 5 A
Max. power 120 W
Utilisation category
In accordance with the standard EN 60947-5-1
Utilisation category of safety contacts
AC15 at 230 V
Max. current 5 A
DC13 (6 cycles/min) at 24 V
Max. current 7 A
Utilisation category of auxiliary contacts
AC15 at 230 V
Max. current 2 A
DC13 (6 cycles/min) at 24 V
Max. current 2 A
External contact fuse protection, safety contacts
In accordance with the standard EN 60947-5-1
Max. melting integral 240 A²s
Blow-out fuse, quick 10 A
Blow-out fuse, slow 6 A
Blow-out fuse, gG 10 A
Circuit breaker 24V AC/DC, characteristic B/C 6 A
External contact fuse protection, auxiliary contacts
Max. melting integral 240 A²s
Blow-out fuse, quick 6 A
Blow-out fuse, slow 4 A
Blow-out fuse, gG 6 A
Circuit breaker 24 V AC/DC, characteristic B/C 4 A
Conventional thermal current 8 A
Contact material AgSnO2 + 0,2 µm Au
Times
Switch-on delay
Typ. switch-on delay 450 ms
Max. switch-on delay 900 ms
Delay-on de-energisation
With E-STOP typ. 15 ms
With E-STOP max. 50 ms
With power failure typ. 100 ms
With power failure max. 200 ms

PNOZ 15
Operating Manual PNOZ 15
18492-EN-04 17
Times
Recovery time at max. switching frequency 1/s
After E-STOP 500 ms
After power failure 500 ms
Supply interruption before de-energisation 35 ms
Fuse trigger delay 150 ms
Simultaneity, channel 1 and 2 max. ∞
Environmental data
Climatic suitability EN 60068-2-78
Ambient temperature
Temperature range -10 - 55 °C
Storage temperature
Temperature range -40 - 85 °C
Climatic suitability
Humidity 93 % r. h. at 40 °C
Condensation during operation Not permitted
EMC EN 60947-5-1, EN 61000-6-2, EN 61326-3-1
Vibration
In accordance with the standard EN 60068-2-6
Frequency 10 - 55 Hz
Amplitude 0,35 mm
Airgap creepage
In accordance with the standard EN 60947-1
Overvoltage category III / II
Pollution degree 2
Rated insulation voltage 400 V
Rated impulse withstand voltage 4 kV
Protection type
Housing IP40
Terminals IP20
Mounting area (e.g. control cabinet) IP54
Mechanical data
Mounting position Any
Mechanical life 10,000,000 cycles
Material
Bottom PPO UL 94 V0
Front ABS UL 94 V0
Top PPO UL 94 V0
Connection type Screw terminal
Mounting type Fixed
Conductor cross section with screw terminals
1 core flexible 0,2 - 4 mm², 24 - 10 AWG
2 core with the same cross section, flexible with
crimp connectors, no plastic sleeve 0,2 - 2,5 mm², 24 - 14 AWG
2 core with the same cross section, flexible without
crimp connectors or with TWIN crimp connectors 0,2 - 2,5 mm², 24 - 14 AWG

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18492-EN-04 18
Mechanical data
Torque setting with screw terminals 0,8 Nm
Dimensions
Height 87 mm
Width 90 mm
Depth 121 mm
Weight 465 g
Where standards are undated, the 2017-01 latest editions shall apply.
Safety characteristic data
NOTICE
You must comply with the safety characteristic data in order to achieve the
required safety level for your plant/machine.
Operating
mode
EN ISO
13849-1:
2015
PL
EN ISO
13849-1:
2015
Category
EN62061
SIL CL
EN62061
PFHD [1/h]
IEC 61511
SIL
IEC 61511
PFD
EN ISO
13849-1:
2015
TM [year]
–PL e Cat. 4 SIL CL 3 2,31E-09 SIL 3 2,03E-06 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.
Supplementary data
CAUTION!
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.
The PFH value depends on the switch frequency and the load of the relay output.
If the service life graphs are not accessible, the stated PFH value can be used irrespective
of the switch 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.

PNOZ 15
Operating Manual PNOZ 15
18492-EN-04 19
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 negli-
gible.
Number of cycles x 1000
Switching current (A)
Example
}Inductive load: 0.2 A
}Utilisation category: AC15
}Contact service life: 4 000 000 cycles
Provided the application to be implemented requires fewer than 4 000 000 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 DC con-
tactors, use flywheel diodes for spark suppression.
Order reference
Product type Features Connection type Order No.
PNOZ 15 24 VDC Screw terminals 774 050
EC declaration of conformity
This product/these products meet the requirements of the directive 2006/42/EC for ma-
chinery of the European Parliament and of the Council. The complete EC Declaration of
Conformity is available on the Internet at www.pilz.com/support/downloads.
Representative: Norbert Fröhlich, Pilz GmbH & Co. KG, Felix-Wankel-Str. 2, 73760 Ost-
fildern, Germany

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CMSE®, InduraNET p®, PAS4000®, PAScal®, PASconfig®, Pilz®, PIT®, PLID®, PMCprimo®, PMCprotego®, PMCtendo®, PMD®, 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. 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 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.
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ecological materials and energy-saving technologies.
Offices and production facilities are ecologically designed,
environmentally-aware and energy-saving. So Pilz offers
sustainability, plus the security of using energy-efficient
products and environmentally-friendly solutions.
Pilz GmbH & Co. KG
Felix-Wankel-Straße 2
73760 Ostfildern, Germany
Tel.: [phone]
Fax: [phone]
[email protected]
www.pilz.com
200XXXX-EN-0X
0-0-2-3-000, 2017-00 Printed in Germany
© Pilz GmbH & Co. KG, 2017
Back cover
18492-EN-04, 2018-07 Printed in Germany © Pilz GmbH & Co. KG, 2015