Pilz PNOZ s8 User manual

PNOZ s8
Operating Manual-21400-EN-10
}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 s8
21400-EN-10 3
Introduction 5
Validity of documentation 5
Using the documentation 5
Definition of symbols 5
Safety 6
Intended use 6
Safety regulations 6
Safety assessment 6
Use of qualified personnel 7
Warranty and liability 7
Disposal 7
For your safety 7
Unit features 8
Safety features 8
Block diagram/terminal configuration 8
Function description 9
Timing diagram 9
Installation 9
Wiring 10
Preparing for operation 10
Operation 11
Status indicators 12
Error indicators 12
Faults - malfunctions 12
Dimensions in mm 12
Technical details 13
Safety characteristic data 16
Supplementary data 17
Service life table 17
Permitted operating height 18

Contents
Operating Manual PNOZ s8
21400-EN-10 4
Remove plug-in terminals 19
Order reference 19
EC declaration of conformity 19

PNOZ s8
Operating Manual PNOZ s8
21400-EN-10 5
Introduction
Validity of documentation
This documentation is valid for the product PNOZ s8. 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 s8
Operating Manual PNOZ s8
21400-EN-10 6
INFORMATION
This gives advice on applications and provides information on special fea-
tures.
Safety
Intended use
The contact expansion module PNOZ s8 meets the requirements of EN60947-5-1,
EN60204-1 and VDE0113-1. It is used to increase the number of safety contacts available
on a base unit. Base units are all safety relays with feedback loop.
The max. achievable safety level depends on the base unit. The expansion module may not
exceed this. The safety-related characteristic values stated under Safety-related character-
istic data [ 16] can only be achieved if the base unit also exhibits these values.
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 [ 13]).
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 s8
Operating Manual PNOZ s8
21400-EN-10 7
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 s8
Operating Manual PNOZ s8
21400-EN-10 8
Unit features
}Relay outputs:
– 2 safety contacts (N/O), instantaneous
}1 semiconductor output
}LED for:
– Input status, channel1
– Input status, channel2
– Switch status of the safety contacts
– Fault
}Plug-in connection terminals (either spring-loaded terminal or screw terminal)
}See order reference for unit types
Safety features
The unit meets the following safety requirements:
}The unit monitors its own output contacts.
}The safety function remains effective in the case of a component failure.
}Earth fault in the feedback loop:
Detected, depending on the base unit that is used.
}Earth fault in the input circuit:
The output relays de-energise and the safety contacts open.
Block diagram/terminal configuration
Interface
expansion
module
Fig.: Centre: Front view with cover, right: Front view without cover
*Safe separation from non-marked area in accordance with EN 60947-1, 6 kV, basic insula-
tion between all safety contacts.

PNOZ s8
Operating Manual PNOZ s8
21400-EN-10 9
Function description
with PNOZsigma base unit:
}Dual-channel operation via PNOZsigma connector
without PNOZsigma base unit:
}Single-channel operation: one input circuit affects the output relays
Timing diagram
POWER/Input
Legend
}POWER/Input: Supply voltage/input
}Output safe: Safety contacts
}Out semi: Semiconductor output
}t1: Switch-on delay
}t2: Delay-on de-energisation
Installation
Install contact expansion module without base unit:
}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 expander
module
}Connect the base unit and the contact expansion module using the connector supplied,
before mounting the units to the DIN rail.
Control cabinet installation
}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
bracket or end angle).
}Push the unit upwards or downwards before lifting it from the DIN rail.

PNOZ s8
Operating Manual PNOZ s8
21400-EN-10 10
Wiring
Please note:
}Information given in the "Technical details [ 13]" 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 [ 13]).
}Calculation of the max. cable length lmax in the input circuit:
Rlmax
Rl / km
Imax =
Rlmax = max. overall cable resistance (see Technical details [ 13])
Rl/km = cable resistance/km
}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.
}Ensure the wiring and EMC requirements of EN 60204-1 are met.
}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.
Preparing for operation
Supply voltage AC DC
A1
A2
24 V DC
0 V
PNOZsigma
expansion
module
Input circuit Single-channel Dual-channel
Base unit:
Safety relay PNOZ X
A1
A2
24 V DC
0 V
PNOZsigma
expansion
module
Base unit:
Safety relay PNOZelog
Driven via semiconductor outputs
(24 VDC)
A1
A20 V
O1
L-
PNOZsigma
expansion
module

PNOZ s8
Operating Manual PNOZ s8
21400-EN-10 11
Feedback loop
}with PNOZsigma base unit:
The feedback loop is connected and evaluated via the connector.
}without PNOZsigma base unit:
Feedback loop does not need to be monitored because the contact expansion block
monitors its own output contacts.
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 linked via the connector, no additional wiring is necessary.
Do not connect A1 to the contact expansion module!
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 for SIL CL 2/PL c at
least 1 x per year, so that the internal diagnostics can check that the safety contacts open
correctly.
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.
LEDs indicate the status and errors during operation:
LED on
LED flashes

PNOZ s8
Operating Manual PNOZ s8
21400-EN-10 12
Status indicators
IN1
Channel1 actuated.
IN2
Channel2 actuated.
IN1, IN2, OUT
Safety contacts are closed.
Error indicators
FAULT
Diagnostics: Internal error, unit defective
}Remedy: Switch supply voltage off and then on again, change unit if neces-
sary.
Faults - malfunctions
}Contact malfunctions: If the contacts have welded, reactivation will not be possible after
the input circuit has opened.
Dimensions in mm
*with spring-loaded terminals
120 (4.72")
* 100 (3,94")
98 (3.86")
12,5 (0.69")

PNOZ s8
Operating Manual PNOZ s8
21400-EN-10 13
Technical details
General 750108 751108
Approvals
CCC, CE, EAC (Eurasian),
KOSHA, TÜV, cULus Listed
CCC, CE, EAC (Eurasian),
KOSHA, TÜV, cULus Listed
Electrical data 750108 751108
Supply voltage
Voltage 24 V 24 V
Kind DC DC
Voltage tolerance -20 %/+20 % -20 %/+20 %
Output of external power supply
(DC) 2 W 2 W
Residual ripple DC 20 % 20 %
Duty cycle 100 % 100 %
Inputs 750108 751108
Number 1 1
Voltage at
Input circuit DC 24 V 24 V
Current at
Input circuit DC 65 mA 65 mA
Max. inrush current impulse
Current pulse, input circuit 0,6 A 0,6 A
Pulse duration, input circuit 15 ms 15 ms
Max. overall cable resistance Rl-
max
Single-channel at UB DC 30 Ohm 30 Ohm
Semiconductor outputs 750108 751108
Number 1 1
Voltage 24 V 24 V
Current 20 mA 20 mA
Relay outputs 750108 751108
Number of output contacts
Safety contacts (N/O), instant-
aneous 2 2
Max. short circuit current IK 1 kA 1 kA
Utilisation category
In accordance with the standard EN 60947-4-1 EN 60947-4-1

PNOZ s8
Operating Manual PNOZ s8
21400-EN-10 14
Relay outputs 750108 751108
Utilisation category of safety con-
tacts
AC1 at 240 V 240 V
Min. current 0,02 A 0,02 A
Max. current 3 A 3 A
Max. power 720 VA 720 VA
DC1 at 24 V 24 V
Min. current 0,02 A 0,02 A
Max. current 3 A 3 A
Max. power 72 W 72 W
Utilisation category
In accordance with the standard EN 60947-5-1 EN 60947-5-1
Utilisation category of safety con-
tacts
AC15 at 230 V 230 V
Max. current 1,5 A 1,5 A
DC13 (6 cycles/min) at 24 V 24 V
Max. current 1,5 A 1,5 A
Utilisation category in accordance
with UL
Voltage 240 V AC G. P. 240 V AC G. P.
With current 3 A 3 A
Voltage 24 V DC G. P. 24 V DC G. P.
With current 3 A 3 A
Pilot Duty B300, R300 B300, R300
External contact fuse protection,
safety contacts
In accordance with the standard EN 60947-5-1 EN 60947-5-1
Blow-out fuse, quick 4 A 4 A
Blow-out fuse, slow 2 A 2 A
Blow-out fuse, gG 4 A 4 A
Circuit breaker 24V AC/DC,
characteristic B/C 2 A 2 A
Conventional thermal current 3 A 3 A
Contact material AgSnO2 AgSnO2
Times 750108 751108
Switch-on delay
With automatic start after power
on typ. 100 ms 100 ms
With automatic start after power
on max. 150 ms 150 ms
Delay-on de-energisation
With E-STOP typ. 30 ms 30 ms
With E-STOP max. 40 ms 40 ms
With power failure typ. 30 ms 30 ms
With power failure max. 40 ms 40 ms

PNOZ s8
Operating Manual PNOZ s8
21400-EN-10 15
Environmental data 750108 751108
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
Climatic suitability
Humidity 93 % r. h. at 40 °C 93 % r. h. at 40 °C
Condensation during operation Not permitted Not permitted
EMC EN 60947-5-1, EN 61000-6-2, EN
61000-6-4, EN 61326-3-1
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 EN 60068-2-6
Frequency 10 - 55 Hz 10 - 55 Hz
Amplitude 0,35 mm 0,35 mm
Airgap creepage
In accordance with the standard EN 60947-1 EN 60947-1
Overvoltage category III / II III / II
Pollution degree 2 2
Rated insulation voltage 250 V 250 V
Rated impulse withstand voltage 4 kV 4 kV
Protection type
Housing IP40 IP40
Terminals IP20 IP20
Mounting area (e.g. control cab-
inet) IP54 IP54
Mechanical data 750108 751108
Mounting position Any Any
Mechanical life 5,000,000 cycles 5,000,000 cycles
Material
Bottom PC PC
Front PC PC
Top PC PC
Connection type Screw terminal Spring-loaded terminal
Mounting type plug-in plug-in
Conductor cross section with screw
terminals
1 core flexible 0,25 - 2,5 mm², 24 - 12 AWG –
2 core with the same cross sec-
tion, flexible with crimp connect-
ors, no plastic sleeve 0,25 - 1 mm², 24 - 16 AWG –
2 core with the same cross sec-
tion, flexible without crimp con-
nectors or with TWIN crimp con-
nectors 0,2 - 1,5 mm², 24 - 16 AWG –
Torque setting with screw terminals 0,5 Nm –

PNOZ s8
Operating Manual PNOZ s8
21400-EN-10 16
Mechanical data 750108 751108
Conductor cross section with
spring-loaded terminals: Flexible
with/without crimp connector – 0,2 - 2,5 mm², 24 - 12 AWG
Spring-loaded terminals: Terminal
points per connection – 2
Stripping length with spring-loaded
terminals – 9 mm
Dimensions
Height 98 mm 100 mm
Width 12,5 mm 12,5 mm
Depth 120 mm 120 mm
Weight 105 g 105 g
Where standards are undated, the 2017-01 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 c Cat. 3 SIL CL 2 2,00E-07 SIL 2 6,35E-03 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.

PNOZ s8
Operating Manual PNOZ s8
21400-EN-10 17
Supplementary data
CAUTION!
It is essential to consider the values in the relays' service life table. The re-
lay outputs' safety-related characteristic data is only valid if the values in the
service life table are met.
The PFH value depends on the switching frequency and the load on the relay output.
If the values in the service life table 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.
Service life table
The service life table indicates 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.
Load type Switching current Number of cycles
DC1 3 A 200,000
DC13 1.5 A 75,000
AC1 3 A 50,000
AC15 1.5 A 50,000

PNOZ s8
Operating Manual PNOZ s8
21400-EN-10 18
Permitted operating height
The values stated in the technical details apply to the use of the device in operating heights
up to max. 2000 m above sea level. When used in greater heights, constraints have to be
taken into account:
}Permitted maximum operating height 5000 m
}Reduction of rated insulation voltage and rated impulse withstand voltage for applica-
tions with safe separation:
Maximum operation
height
Rated insulation
voltage Overvoltage category
Max. rated impulse
withstand voltage
3000 m 150 V II 2.5 kV
100 V III 2.5 kV
4000 m 150 V II 2.5 kV
100 V III 2.5 kV
5000 m 100 V II 1.5 kV
24 V III 0.8 kV
}Reduction of rated insulation voltage and rated impulse withstand voltage for applica-
tions with basic insulation:
Maximum operation
height Rated insulation voltage Overvoltage category
Max. rated impulse
withstand voltage
3000 m 250 V II 2.5 kV
150 V III 2.5 kV
4000 m 250 V II 2.5 kV
150 V III 2.5 kV
5000 m 150 V II 1.5 kV
100 V III 1.5 kV
}From an operating height of 2000 m the max. permitted ambient temperature is re-
duced by 0.5 °C/100 m
Operating height Permitted ambient temperature
3000 m 50 °C
4000 m 45 °C
5000 m 40 °C

PNOZ s8
Operating Manual PNOZ s8
21400-EN-10 19
Remove plug-in terminals
Procedure: Insert the screwdriver into the housing recess behind the terminal and lever the
terminal out.
Do not remove the terminals by pulling the cables!
Order reference
Product type Features Connection type Order No.
PNOZ s8 24 VDC Screw terminals 750 108
PNOZ s8 C 24 VDC Spring-loaded terminals 751 108
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

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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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sustainability, plus the security of using energy-ecient
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73760 Ostfildern, Germany
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200XXXX-EN-0X
0-0-2-3-000, 2017-00 Printed in Germany
© Pilz GmbH & Co. KG, 2017
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21400-EN-10, 2017-06 Printed in Germany © Pilz GmbH & Co. KG, 2015