Pilz PNOZ c2 User manual

PNOZ c2
Operating Manual-22212-EN-04
}Safety relays

Preface
This document is a translation of 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.
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 c2
22212-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 5
Warranty and liability 6
Disposal 6
For your safety 6
Unit features 7
Safety features 7
Block diagram/terminal configuration 7
Function description 8
Installation 8
Wiring 8
Connect cable with crimp connector 9
Connect cable without crimp connector 10
Disconnect cable 10
Preparing for operation 11
Operation 12
Status indicators 12
Faults - malfunctions 13
Dimensions in mm 13
Technical details 14
Safety characteristic data 17
Supplementary data 17
Service life graph 18
Order reference 19
EC declaration of conformity 19

PNOZ c2
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Introduction
Validity of documentation
This documentation is valid for the product PNOZ c2. 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.

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INFORMATION
This gives advice on applications and provides information on special fea-
tures.
Safety
Intended use
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 dual-channel positive switching OSSDs such as
}periodically tested light guard type 2 in accordance with EN 61496-1
}Light guard type 4 EN 61496-1
}safe sensors with semiconductor outputs
The safety relay provides a safety-related interruption of a safety circuit.
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).
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 unit 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.
Use of qualified personnel
The products may only be assembled, installed, programmed, commissioned, operated,
maintained and decommissioned by competent persons.

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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 this description under "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.

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Unit features
}Positive-guided relay outputs:
– 2 safety contacts (N/O), instantaneous
}1 semiconductor output (auxiliary output)
}Connection options for:
– Type 2 or Type 4 light guards
– safe sensors with semiconductor outputs (OSSD)
– Start button
}LED display for:
– Supply voltage
– Switch status channel 1
– Switch status channel 2
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
14
S33
S35
S34
13
23
24
Y32
PNOZ c2
S22
S12
A2
A2
A2
A1
A1
A1
Power
Ch. 1
Ch. 2
tD12ms
* Insulation from non-marked area: Safe separation (overvoltage category III),
Insulation between relay contacts: basic insulation (overvoltage category III), safe separa-
tion (overvoltage category II)

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Function description
When the supply voltage is supplied, the "POWER" LED illuminates. The unit is ready for
operation when the start circuit is closed or a start contact in the start circuit is opened and
then closed again.
}High signal at the input circuit (e.g. light guard not interrupted): The safety contacts are
closed and the auxiliary contact is enabled.
}Low signal at the input circuit (e.g. light guard interrupted): The safety contacts are
open and the auxiliary contact is disabled.
}Dual-channel operation without detection of shorts across contacts: Redundant input
circuit, detects earth faults in the start and input circuit .
}Automatic start: Unit is active as soon as a high signal is present at the input circuit.
}Monitored start: Unit is active when there is a high signal at the input circuit is closed
and then the start circuit is closed.
}Increase in the number of available contacts by connecting contact expander modules
or external contactors/relays.
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.
}Ensure the unit is mounted securely on a vertical DIN rail (35 mm) by using a fixing ele-
ment (e.g. retaining bracket or an end angle).
Wiring
Please note:
}Information given in the "Technical details" must be followed.
}Outputs 13-14 and 23-24 are safety contacts, the semiconductor output Y32 is an auxil-
iary output (e.g. for display).
}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).
}Use copper wire that can withstand 60/75°C.
}Do not connect capacitive load.
}Do not switch low currents using contacts that have been used previously with high cur-
rents.
}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 IEC 60204-1 are met.

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INFORMATION
The voltage at the inputs S12, S22 has to be at least 24 V DC less the lower
tolerance value of the supply voltage (s. technical details). When the voltage
is too low, increase the supply voltage until at least the lower tolerance
value is reached at the inputs.
Connect cable with crimp connector
}Strip the cable [1] and apply a crimp connector.
}Insert the stripped cable with the crimp connector applied into the terminal point [2] [3]
as far as it will go.
NOTICE
Do not use a tool to connect the cable.
[1] [2] [3]
10 mm
Fig.: Connect cable with crimp connector

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Connect cable without crimp connector
}Strip the cable [1].
}Using the screwdriver, press the actuator button [2] and insert the stripped cable into
the terminal point [2] [3] as far as it will go.
We recommend you use a screw driver with a 0.4 x 2.5 mm (DIN 5264) blade!
[1] [2] [3]
10 mm
Fig.: Connect cable without crimp connector
Disconnect cable
We recommend you use a screw driver with a 0.4 x 2.5 mm (DIN 5264) blade!
}Using the screwdriver, press the actuator button and pull the cable out of the terminal
point [4].
[4]
Fig.: Disconnect cable

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Preparing for operation
Supply voltage AC DC
A1
A2
L+
L-
Input circuit Single-channel Dual-channel
Light grid of safe sensor with de-
tection of shorts across contacts
and short-circuit-proof OSSDs
A1
A1
A1
A2
A2
A2 S12
S22
24 V DC
GND
*
*
NOTICE
It must not be possible to switch off the supply voltage for the PNOZ c2
separately from the supply voltage for the safe sensor or the light guard.
* When operated with a light guard: Use the free connections A1 and A2 to
connect the supply voltage for the transmitter.
Start circuit/feedback loop Start circuit Feedback loop
automatic start
Monitored start

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NOTICE
In the event of an automatic start:
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.
Semiconductor output
*Connect together the 0V connections on all the external power supplies
Operation
In switched-on state of relay outputs the mechanical contact of the relay cannot be tested
automatically. Depending on the operational environment, measures to detect the non-
opening of electromechanical contact elements may be required under some circum-
stances.
When using the product in accordance with the European Machinery Directive it has to be
checked whether the safety contacts of the relay outputs open correctly. Start the device
again or open the safety contacts (switch off output), so that the internal diagnostics can
check the correct opening of the safety contacts
}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.
The unit is ready for operation when the Power LED is permanently lit.
LEDs indicate the status and errors during operation:
Status indicators
POWER
Supply voltage is present.
CH.1
Safety contacts of channel 1 are closed.

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CH.2
Safety contacts of channel 2 are closed.
Faults - malfunctions
}Contact malfunctions: If the contacts have welded, reactivation will not be possible after
the input circuit has opened.
Dimensions in mm
100
94.5
22.5

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Technical details
General
Approvals CCC, CE, EAC (Eurasian), TÜV, cULus Listed
Electrical data
Supply voltage
Voltage 24 V
Kind DC
Voltage tolerance -20 %/+20 %
Output of external power supply (DC) 3 W
Residual ripple DC 20 %
Duty cycle 100 %
Max. inrush current impulse
Current pulse, A1 2 A
Pulse duration, A1 4 ms
Inputs
Number 2
Voltage at
Input circuit DC 24 V
Start circuit DC 24 V
Feedback loop DC 24 V
Current at
Input circuit DC 30 mA
Start circuit DC 40 mA
Feedback loop DC 40 mA
Max. inrush current impulse
Current pulse, input circuit 0,2 A
Pulse duration, input circuit 70 ms
Current pulse, feedback loop 0,15 A
Pulse duration, feedback loop 1 ms
Current pulse, start circuit 0,15 A
Pulse duration, start circuit 1 ms
Semiconductor outputs
Number 1
Voltage 24 V
Current 20 mA
Relay outputs
Number of output contacts
Safety contacts (N/O), instantaneous 2
Max. short circuit current IK 1 kA
Utilisation category
In accordance with the standard EN 60947-4-1

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Relay outputs
Utilisation category of safety contacts
AC1 at 240 V
Min. current 0,01 A
Max. current 3 A
Max. power 750 VA
DC1 at 24 V
Min. current 0,01 A
Max. current 4 A
Max. power 100 W
Utilisation category
In accordance with the standard EN 60947-5-1
Utilisation category of safety contacts
AC15 at 230 V
Max. current 1,5 A
DC13 (6 cycles/min) at 24 V
Max. current 1,5 A
Utilisation category in accordance with UL
Voltage 240 V AC G.U. (same polarity)
With current 3 A
Voltage 24 V DC G. U.
With current 4 A
Pilot Duty B300, R300
External contact fuse protection, safety contacts
In accordance with the standard EN 60947-5-1
Max. melting integral 66 A²s
Blow-out fuse, quick 4 A
Blow-out fuse, slow 3,15 A
Blow-out fuse, gG 4 A
Circuit breaker 24V AC/DC, characteristic B/C 3 A
Conventional thermal current 4 A
Contact material AgCuNi + 0,2 µm Au
Times
Switch-on delay
With automatic start typ. 200 ms
With automatic start max. 550 ms
With monitored start with rising edge typ. 20 ms
With monitored start with rising edge max. 50 ms
Delay-on de-energisation
With E-STOP typ. 5 ms
With E-STOP max. 12 ms
Recovery time at max. switching frequency 1/s
After E-STOP 300 ms
Waiting period with a monitored start
With rising edge 300 ms

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Times
Min. start pulse duration with a monitored start
With rising edge 30 ms
Supply interruption before de-energisation 20 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 61000-6-4, 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
Pollution degree 2
Rated insulation voltage 250 V
Rated impulse withstand voltage 6 kV
Protection type
Mounting area (e.g. control cabinet) IP54
Housing IP40
Terminals IP20
Mechanical data
Mounting position Any
Mechanical life 10,000,000 cycles
Material
Bottom PC
Top PC
Connection type Spring-loaded terminal
Mounting type Fixed
Conductor cross section with spring-loaded terminals
1 core flexible without crimp connector 0,25 - 1,5 mm², 24 - 16 AWG
1 core flexible with crimp connector 0,25 - 0,75 mm², 24 - 20 AWG
Spring-loaded terminals: Terminal points per connec-
tion 1
Stripping length with spring-loaded terminals 10 mm

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Mechanical data
Dimensions
Height 105 mm
Width 22,5 mm
Depth 100 mm
Weight 160 g
Where standards are undated, the 2016-11 latest editions shall apply.
Safety characteristic data
NOTICE
You must comply with the safety-related 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]
Safety con-
tacts, in-
stantaneous 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 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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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.
Cycles x 1000
Switching current (A)
Fig.: Service life graphs at 24 V DC and 230 V AC
Number of cycles x 1000
Switching current (A)
Fig.: Service life graphs at 110 V DC

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Example
}Inductive load: 0.2 A,
}Utilisation category: AC15
}Contact service life: 1 000 000 cycles
Provided the application to be implemented requires fewer than 1 000 000 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 DC contactors, use flywheel diodes for spark suppression.
Order reference
Product
type Features Terminals Order No.
PNOZ c2 24 VDC With spring-loaded terminals 710 002
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/downloads.
Representative: Norbert Fröhlich, Pilz GmbH & Co. KG, Felix-Wankel-Str. 2, 73760 Ost-
fildern, Germany