Pilz PSS u2 EF 8DO 0.5A User manual

PSS u2 EF 8DO 0.5A
Operating Manual-1003621-EN-03
}PSS u2 in the automation system PSS 4000
}Remote I/O system PSS u2

Preface
This document is the original document.
Where unavoidable, for reasons of readability, the masculine form has been selected when
formulating this document. We do assure you that all persons are regarded without discrim-
ination and on an equal basis.
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.
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
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1 Introduction ............................................................................................................................5
1.1 Validity of documentation.......................................................................................................... 5
1.2 Using the documentation .......................................................................................................... 5
1.3 Definition of symbols................................................................................................................. 5
2 Overview .................................................................................................................................7
2.1 Module features ........................................................................................................................ 7
3 Safety ...................................................................................................................................... 8
3.1 Intended use ............................................................................................................................. 8
3.2 System requirements................................................................................................................ 8
3.3 Safety regulations ..................................................................................................................... 9
3.3.1 Safety assessment ................................................................................................................... 9
3.3.2 Use of qualified personnel ........................................................................................................ 9
3.3.3 Warranty and liability ................................................................................................................ 9
3.3.4 Disposal .................................................................................................................................... 9
4 Function description ............................................................................................................. 10
4.1 Block diagram ........................................................................................................................... 10
4.2 Supply....................................................................................................................................... 10
4.3 Outputs ..................................................................................................................................... 10
4.4 Output capacitance C ............................................................................................................... 13
4.5 Integrated protection mechanisms............................................................................................ 15
4.6 Energy-saving functions ........................................................................................................... 15
4.7 Reaction times .......................................................................................................................... 15
5 Address assignment ............................................................................................................. 16
6 Installation ..............................................................................................................................17
6.1 General installation guidelines.................................................................................................. 17
6.1.1 Dimensions in mm .................................................................................................................... 17
6.2 Inserting and removing an electronic module ........................................................................... 18
6.2.1 Inserting an electronic module.................................................................................................. 18
6.2.2 Removing an electronic module ............................................................................................... 20
6.2.3 Changing an electronic module during operation ..................................................................... 21
7 Wiring ......................................................................................................................................22
7.1 General wiring guidelines ......................................................................................................... 22
7.1.1 Connection mechanism for terminal blocks .............................................................................. 22
7.2 Terminal configuration .............................................................................................................. 23
7.3 Function test during commissioning ......................................................................................... 23
8 Operation ................................................................................................................................24
8.1 Display elements and messages .............................................................................................. 24
9 Technical Details ...................................................................................................................26
9.1 Safety characteristic data ......................................................................................................... 28

Contents
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10 Order reference ......................................................................................................................29
10.1 Product ..................................................................................................................................... 29
10.2 Accessories .............................................................................................................................. 29
11 EC declaration of conformity ................................................................................................ 31
12 UKCA-Declaration of Conformity ......................................................................................... 32

Introduction
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1 Introduction
1.1 Validity of documentation
This operating manual explains the function and operation, describes the installation and
provides guidelines on how to connect the product.
This documentation is valid for the product PSS u2 EF 8DO 0.5A hardware version 01 or
higher. It is valid until new documentation is published.
1.2 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.
Please refer to the PSS u2 Installation Manual.
1.3 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.

Introduction
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INFORMATION
This gives advice on applications and provides information on special fea-
tures.

Overview
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2 Overview
Module structure:
A module consists of
}an electronic module,
}a terminal block with cage clamp terminals and
}a module carrier
The electronic modules are plugged into the backplane and determine the function. The
backplane is used for communication between the head module and the electronic modules
and forms the carrier unit for the electronic modules. The terminal block is plugged into the
electronic modules and is used to connect the field wiring.
Details of the terminal blocks that can be used are available under "Intended Use".
2.1 Module features
Application of the product PSS u2 EF 8DO 0.5A:
Electronic module with digital single-pole outputs for failsafe applications
The product has the following features:
}8 digital outputs
– Semiconductor technology
– Single-pole
– Positive-switching
– Current load capacity per output: 0,5 A
– Short circuit-proof
– Overload-proof
– Configurable switch-off delay
– Configurable on/off tests
– Configurable repetition time of the on tests
}Energy-saving functions
}LEDs for:
– Switch status of each output
– Module error

Safety
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3 Safety
3.1 Intended use
The module provides failsafe outputs and may be used for failsafe applications in the PSS
u2 system.
The module meets the requirements of ENIEC61508 up to SIL 3 and ENISO13849-1 up
to PLe.
The outputs may be used to switch:
}Resistive loads
}Inductive loads
}Capacitive loads
The programmable safety system should be installed in a protected environment that meets
at least the requirements of pollution degree 2. Example: Protected inside space or control
cabinet with protection class IP54.
Make sure that only authorised personnel have access to the programmable safety system.
Intended use includes making the electrical installation EMC-compliant. The module is de-
signed for use in an industrial environment. Interference may occur if used in other areas.
The following is deemed improper use in particular
}Any component, technical or electrical modification to the module,
}Use of the module outside the areas described in this manual,
}Any use of the module that is not in accordance with the technical details.
The module PSS u2 EF 8DO 0.5A may be used in conjunction with the following terminal
block:
}16-pin terminal block
3.2 System requirements
INFORMATION
The module is supported by
}PASconfig from version 1.0.0
– We recommend that you always use the latest version (download
from www.pilz.com).

Safety
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3.3 Safety regulations
3.3.1 Safety assessment
Before using a device, a safety assessment in accordance with the Machinery Directive is
required.
The product as an individual component fulfils the functional safety requirements in accord-
ance with EN ISO 13849 and EN 62061. However, this does not guarantee the functional
safety of the overall plant/machine. To achieve the relevant safety level of the overall plant/
machine’s required safety functions, each safety function needs to be considered separ-
ately.
3.3.2 Use of qualified personnel
The products may only be assembled, installed, programmed, commissioned, operated,
maintained and decommissioned by persons who are competent to do so.
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 prevention,
}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 specific
application.
3.3.3 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.).
3.3.4 Disposal
}In safety-related applications, please comply with the mission time TM in the safety-related
characteristic data.
}When decommissioning, please comply with local regulations regarding the disposal of
electronic devices (e.g. Electrical and Electronic Equipment Act).

Function description
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4 Function description
4.1 Block diagram
Module
Supply
Data
(FS)
Periphery
Supply
+24 V DC
Module Bus
1
O0
2
0V
15
O7
16
0V
Fig.: Block diagram PSS u2 EF 8DO 0.5A
4.2 Supply
}The module is supplied with voltage via the head module.
}The periphery supply provides the outputs with voltage.
}The module routes the periphery supply from the module bus to the terminals on the ter-
minal blocks.
4.3 Outputs
Signals at the output
}"0" signal (0V) at the output:
– Output is high impedance
– No current to the load
}"1" signal (+24V) at the output:
– Output is low impedance
– Current is supplied to the load
Output test
}Outputs that are switched on are checked via regular off tests.
– Off tests are run in each test cycle
– The maximum duration of the off test can be configured (default value: 3 ms)
– Outputs that are switched on are switched off for the duration of the off test.
– The load must not switch off because of the test.

Function description
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}Outputs that are switched off are checked via regular on tests.
– On tests are run based on the configured repetition time. If a repetition time has not
been configured, then on tests are run in each test cycle.
– The maximum duration of the on test can be configured (default value: 3 ms)
– Outputs that are switched off are switched on for the duration of the on test.
– The load must not switch on because of the test.
Excluding individual outputs from the output test:
}If a plant is particularly sensitive to the output test, the output test may be switched off for
individual outputs.
}The test must be replaced by other measures, depending on the safety requirement.
}When output tests are switched off:
– The correct switch state is always checked.
– The output's ability to switch will not be detected until the next time the output is
switched on/off. That is why the outputs must be switched regularly during normal op-
eration, so that safety and characteristic safety values are not reduced.
Monitoring the maximum permitted test cycle time
}The duration of a test cycle depends on the number and type of modules. A maximum
test cycle time can be configured. If the output test is not run within the configured cycle
monitoring time, then an error is registered.
Testing for shorts
}The outputs are switched on individually in order to detect shorts across contacts.
}For applications in accordance with Category 4, PL e and SIL 3, detection of shorts
between contacts must be guaranteed either via the on/off test or through other meas-
ures (e.g. asynchronous switching). A short between contacts must be simulated during
commissioning.
Outputs
}The head module sets the output status via the module bus.
}The max. capacity at an output depends on the load (see characteristic). Connecting a
higher capacity may lead to an error.
}Operation with electronic contactors has not been tested and may lead to errors. Please
contact our Customer Support team if you are using electronic contactors.
WARNING!
When wiring an output with capacitance it is essential to note the pulse dur-
ation, repetition period and scan time of the power-up test, otherwise the
load may switch on unintentionally.

Function description
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t3
Fig.: On test for single-pole outputs
Legend
t1Configurable max. test duration (default value: 3 ms)
t2Configurable repetition time of on test in error-free operation
(default value: test is run in each test cycle)
The test cycle time is not configurable and is determined by the head
module. The configuration enables a longer repetition time to be set
between the on tests.
t3Configurable repetition time of on test in the event of an error (default
value: 30 s)
Fig.: Off test for single-pole outputs
Legend
t1Configurable max. test duration (default value: 3 ms)
t2Repetition of off test in each test cycle
Switch-off delay
FS outputs can be switched off with a delay. Even if the process image of outputs switches
from "1" to "0", a "1" signal may remain at the output for the duration of the delay. If there is
another "1" signal during the switch-off delay, the switch-off delay time is reset again and
restarts at the next "0" signal.
In the event of external errors, e.g. if the connection to the controller is lost, the output is
switched off after the set switch-off delay.
However, in the event of internal module errors, the switch-off delay cannot be guaranteed.
Default value: 0 ms (immediate shutdown).

Function description
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tdelay
t
PAA
Clamp
1
0
0
1
tdelay
Fig.: Switch-off delay
Legend
PIO Process image of outputs
tdelay Configured switch-off delay time
If there is another "1" signal, the time is reset and restarts
at the next "0" signal
Clamp Signal at the terminal
4.4 Output capacitance C
0
10
20
30
40
50
0 50 100
150 200 250 300 350 400 450 500
550
C [µF]
I [mA]
[1]
[2]
Fig.: Output capacitance C dependent on load current I
Legend
[1] Max. test duration 1 ms
[2] Max. test duration 3 ms

Function description
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FS outputs can be switched off with a delay. Even if the process image of outputs switches
from "1" to "0", a "1" signal may remain at the output for the duration of the delay. If there is
another "1" signal during the switch-off delay, the switch-off delay time is reset again and
restarts at the next "0" signal.
In the event of external errors, e.g. if the connection to the controller is lost, the output is
switched off after the set switch-off delay.
However, in the event of internal module errors, the switch-off delay cannot be guaranteed.
Default value: 0 ms (immediate shutdown).
tdelay
t
PAA
Clamp
1
0
0
1
tdelay
Fig.: Switch-off delay
Legend
PIO Process image of outputs
tdelay Configured switch-off delay time
If there is another "1" signal, the time is reset and restarts
at the next "0" signal
Clamp Signal at the terminal

Function description
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4.5 Integrated protection mechanisms
The module has the following protection mechanisms:
}Common second shutdown route, tested regularly
}Cyclical output tests
}Tests for shorts between the outputs
The module provides the following diagnostic data:
}Start-up error
}Configuration error
}FS communication error
}Temperature error: too warm
}Temperature error: too hot
}Output error
4.6 Energy-saving functions
The energy levels are supported by the head module and are not configurable. The module
supports the following energy levels:
– Switching off the LEDs that display the module and terminal status
– Switching off the LEDs that display the terminal status
4.7 Reaction times
Detailed information on the reaction times is available in the operating manual of the head
modules.

Address assignment
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5 Address assignment
The module occupies 1 Byte in the process image of outputs.
PIO Meaning State
Bit 0 Output data O0 0: "0" signal (0 V) at the output
1: "1" signal (+ 24 V) at the output
Bit 1 Output data O1
Bit 2 Output data O2
Bit 3 Output data O3
Bit 4 Output data O4
Bit 5 Output data O5
Bit 6 Output data O6
Bit 7 Output data O7
The module occupies 1 Byte in the process image of inputs:
PII Meaning State
Bit 0 Valid bit of output O0 0: Output error
1: The signal in the PIO corresponds to the
output signal
Bit 1 Valid bit of output O1
Bit 2 Valid bit of output O2
Bit 3 Valid bit of output O3
Bit 4 Valid bit of output O4
Bit 5 Valid bit of output O5
Bit 6 Valid bit of output O6
Bit 7 Valid bit of output O7

Installation
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6 Installation
6.1 General installation guidelines
NOTICE
Damage due to electrostatic discharge!
Electrostatic discharge can damage components. Ensure against discharge
before touching the product, e.g. by touching an earthed, conductive sur-
face or by wearing an earthed armband.
6.1.1 Dimensions in mm
The dimensions include the backplane, electronic module and terminal block.
12,5
50,1
54.4
88,37
6
51,1 60
111,1
(95.3)
51,7
Fig.: Dimensions in mm, including backplane, electronic module and terminal block

Installation
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6.2 Inserting and removing an electronic module
Please note:
}Backplane must be installed first.
}Electronic modules may only be plugged or unplugged if the terminal block has been re-
moved first.
}The mechanics of the electronic modules are designed for 20 plug in/out cycles.
}On electronic modules with outputs, the terminal block may only be inserted and removed
when the load is switched off. Unforeseeable error reactions may be triggered if modules
are inserted and removed under load.
6.2.1 Inserting an electronic module
1. Insert the electronic
module into the suspen-
sion lug on the back-
plane.

Installation
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2. Swivel the electronic
module downwards until
you hear it click into
place.
3. Insert the terminal
block into the suspen-
sion lug on the module.
4. Swivel the terminal
block upwards until you
hear it click into place.

Installation
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6.2.2 Removing an electronic module
1. Press the unlocking
mechanism on the ter-
minal block that is
shown by the arrow and
pull off the terminal
block forward.
2. Press the unlocking
mechanism that is
shown by the arrow and
pull off the electronic
module upwards.