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)
PNOZ 15
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.
PNOZ 15
Operating Manual PNOZ 15
18492-EN-04 9
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).
PNOZ 15
Operating Manual PNOZ 15
18492-EN-04 10
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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