Pepperl+Fuchs SIL VIM8 Series User manual

Functional Safety
Vibration Sensor VIM8*
Manual
ISO9001
PL d
2

With regard to the supply of products, the current issue of the following document is applicable:
The General Terms of Delivery for Products and Services of the Electrical Industry, published by the Central
Association of the Electrical Industry (Zentralverband Elektrotechnik und Elektroindustrie (ZVEI) e.V.) in its most
recent version as well as the supplementary clause: "Expanded reservation of proprietorship"
Worldwide
Pepperl+Fuchs Group
Lilienthalstr. 200
68307 Mannheim
Germany
Phone: [phone] - 0
E-mail: [e-mail]
North American Headquarters
Pepperl+Fuchs Inc.
1600 Enterprise Parkway
Twinsburg, Ohio 44087
USA
Phone: [phone]
E-mail: [email protected].com
Asia Headquarters
Pepperl+Fuchs Pte. Ltd.
P+F Building
18 Ayer Rajah Crescent
Singapore 139942
Phone: [phone]
E-mail: [email protected]
https://www.pepperl-fuchs.com

3
Functional Safety Vibration Sensor VIM8*
Contents
2022-07
1 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
1.1 Content of this Document . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
1.2 Safety Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
1.3 Symbols Used . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
2 Product Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
2.1 Function . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
2.2 Interfaces . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
2.3 Marking . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
2.4 Standards and Directives for Functional Safe . . . . . . . . . . . . . . . . . . . . 10
3 Planning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
3.1 Assumptions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
3.2 Safety Function and Safe State . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
3.3 Characteristic Safety Values . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
3.4 Useful Lifetime . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
4 Mounting, Installation and Commissioning . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
4.1 Parameterization . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
5 Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
5.1 Proof Test and Self-Diagnostics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
6 Maintenance and Repair . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
7 List of Abbreviations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

Functional Safety Vibration Sensor VIM8*
Contents
4
2022-07

Functional Safety Vibration Sensor VIM8*
Introduction
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1 Introduction
1.1 Content of this Document
This document contains information for usage of the device in functional safety-related
applications. You need this information to use your product throughout the applicable stages
of the product life cycle. These can include the following:
•Product identification
•Delivery, transport, and storage
•Mounting and installation
•Commissioning and operation
•Maintenance and repair
•Troubleshooting
•Dismounting
•Disposal
The documentation consists of the following parts:
•Present document
•Instruction manual
•Datasheet
Additionally, the following parts may belong to the documentation, if applicable:
•EU-type examination certificate
•EU declaration of conformity
•Attestation of conformity
•Certificates
•Control drawings
•FMEDA report
•Assessment report
•Additional documents
For more information about Pepperl+Fuchs products with functional safety,
see www.pepperl-fuchs.com/sil.
Note
This document does not substitute the instruction manual.
Note
For full information on the product, refer to the instruction manual and further documentation
on the Internet at www.pepperl-fuchs.com.
Note
For specific device information such as the year of construction, scan the QR code
on the device. As an alternative, enter the serial number in the serial number search
at www.pepperl-fuchs.com.

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Functional Safety Vibration Sensor VIM8*
Introduction
1.2 Safety Information
Target Group, Personnel
Responsibility for planning, assembly, commissioning, operation, maintenance,
and dismounting lies with the plant operator.
Only appropriately trained and qualified personnel may carry out mounting, installation,
commissioning, operation, maintenance, and dismounting of the product. The personnel
must have read and understood the instruction manual and the further documentation.
Intended Use
The device is only approved for appropriate and intended use. Ignoring these instructions
will void any warranty and absolve the manufacturer from any liability.
The device is developed, manufactured and tested according to the relevant safety standards.
Use the device only
•for the application described
•with specified environmental conditions
•with devices that are suitable for this safety application
Improper Use
Protection of the personnel and the plant is not ensured if the device is not used according
to its intended use.

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Introduction
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1.3 Symbols Used
This document contains symbols for the identification of warning messages and of informative
messages.
Warning Messages
You will find warning messages, whenever dangers may arise from your actions.
It is mandatory that you observe these warning messages for your personal safety
and in order to avoid property damage.
Depending on the risk level, the warning messages are displayed in descending order
as follows:
Informative Symbols
Action
This symbol indicates a paragraph with instructions. You are prompted to perform an action
or a sequence of actions.
Danger!
This symbol indicates an imminent danger.
Non-observance will result in personal injury or death.
Warning!
This symbol indicates a possible fault or danger.
Non-observance may cause personal injury or serious property damage.
Caution!
This symbol indicates a possible fault.
Non-observance could interrupt the device and any connected systems and plants,
or result in their complete failure.
Note
This symbol brings important information to your attention.

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Functional Safety Vibration Sensor VIM8*
Product Description
2 Product Description
2.1 Function
The following vibration sensor versions are described in this manual:
General
The vibration sensor is used to measure and monitor absolute bearing vibrations in machines
in line with DIN ISO 10816. The effective vibration acceleration value is used
as the measurement parameter.
The vibration sensor determines the vibration variable using rms (root meas square)
averaging. This form of quadratic averaging or pre-filtering enables precise trend statements
about the condition of the application.
The device has 2 switching thresholds LIM1 and LIM2 and the corresponding delay times,
which can be adjusted separately.
The device also has an analog current output. This current output supplies a direct current
of 4 mA to 20 mA proportional to the vibration variable.
Some device versions have an analog current output for the output
of the bearing status parameter, see table above. This output is not safety relevant.
Device version Vibration variable Bearing status
parameter
Pre-alarm and
main alarm
Window
function
VIM8***-**B**-***-******* Vibration acceleration X – X
VIM8***-**C**-***-******* Vibration speed X X –
VIM8***-**G**-***-******* Vibration acceleration – – X
VIM8***-**V**-***-******* Vibration speed – X –
Table 2.1 Device versions

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Product Description
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Device with Pre-Alarm and Main Alarm
The device evaluates the vibration amplitude in two independent channels.
If the vibration variable is exceeded, this is signaled at the switching contacts.
The switching contacts can be used to generate a pre-alarm and a main alarm.
Figure 2.1 Vibration sensor with pre-alarm and main alarm
Device with Window Function
The lower switching threshold of the window area is adjusted on LIM1 and the upper switching
threshold is adjusted on LIM2. If the acceleration value is below or above the adjustable
window area, an alarm will be triggered.
Figure 2.2 Vibration sensor with window function
R1 Relay contact output R1
R2 Relay contact output R2
SP1 Switching threshold LIM1
SP2 Switching threshold LIM2
WCritical state = pre-alarm from SP1/main alarm from SP2 = relay open =
like de-energized state
R1 Relay contact output R1
R2 Relay contact output R2
SP1 Switching threshold LIM1
SP2 Switching threshold LIM2
WWindow area
Critical state = out of window (SP1, SP2) = relay is open = like de-energized state
SP1
R1
R2
SP2
SP1
R1
R2
SP2
W
Note
See corresponding datasheets for further information.

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Functional Safety Vibration Sensor VIM8*
Product Description
2.2 Interfaces
The device has the following interfaces.
Device with Pre-Alarm and Main Alarm
•Safety relevant interfaces:
•Pre-alarm relay (output 1)
•Main alarm relay (output 2)
•Analog current output for the output of the vibration variable (output 3)
•Non-safety relevant interfaces: analog current output for the output of the bearing status
parameter (output 4, only for VIM8***-**C**-***-******* device version)
Device with Window Function
•Safety relevant interfaces:
•Relay for lower switching threshold (output 1)
•Relay for upper switching threshold (output 2)
•Analog current output for the output of the vibration variable (output 3)
•Non-safety relevant interfaces: analog current output for the output of the bearing status
parameter (output 4, only for VIM8***-**B**-***-******* device version)
2.3 Marking
The *-marked letters of the type code are placeholders for versions of the device.
2.4 Standards and Directives for Functional Safe
Device-specific standards and directives
Note
For corresponding connections see datasheet.
Pepperl+Fuchs Group
Lilienthalstraße 200, 68307 Mannheim, Germany
Internet: www.pepperl-fuchs.com
VIM8***-**B**-***-*******, VIM8***-**C**-***-*******
VIM8***-**G**-***-*******, VIM8***-**V**-***-******* Up to SIL 2 and PL d
Functional safety IEC/EN 61508, part 1 –2, edition 2010:
Functional safety of electrical/electronic/programmable electronic
safety-related systems (manufacturer)
Machinery Directive
2006/42/EC EN/ISO 13849, part 1, edition 2015: Safety-related parts of control systems (manufacturer)

Functional Safety Vibration Sensor VIM8*
Planning
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3 Planning
3.1 Assumptions
The following assumptions have been made during the FMEDA:
•The vibration sensor was developed as High Demand System.
•The device corresponds to a 1oo1 architecture with a diagnostic coverage of > 90 %.
The diagnostics are permanent and automatic during operation and the start-up phase
of monitoring.
•The device fulfils a Safe Failure Fraction of 60 % to 90 %. The monitoring is thus a sensor
system in accordance with SIL2.
•The fault mode is the equivalent to alarm operating mode for the switching contacts.
Configuration Mode Use Case
•A vibration sensor in configuration mode is not considered to be in a safe state.
The operator can set the sensor in configuration mode as described in the operating
manual. The safety functions as specified will not operate until configuration
has been saved and the sensor is in the normal operating mode.
Fault Exclusion
•According to ISO 13849-2 (table D.7), the multi-pole plug connection was chosen
to exclude a short circuit between any two adjacent pins.

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Functional Safety Vibration Sensor VIM8*
Planning
3.2 Safety Function and Safe State
Safe State
In the event of a fault that cannot be corrected (e. g. hardware defect, or vibration in resonance
with the sensor), the sensor will switch to the safe state. This state can only be exited
by power cycling.
The safe state can be recognized when all 3 of the following occur at the same time
•All status LEDs are switched (red, yellow, green).
•All switching contacts are opened (low level).
•Current output is set to 0 mA.
Safety Function
Device with Pre-Alarm and Main Alarm
The system includes 3 safety functions:
1. If the measured vibration variable exceeds the threshold value set for the pre-alarm
for longer than the set delay period, the pre-alarm relay will open.
2. If the measured vibration variable exceeds the threshold value set for the main alarm
for longer than the set delay period, the main alarm relay will open.
3. The analog current output depicts the vibration variable measured in the interval
between 4 mA and 20 mA. The vibration variable is the vibration speed.
Device with Window Function
The system includes 3 safety functions:
1. If the measured vibration variable falls below the lower limit value
of the switching threshold LIM1 of the window area for longer than the set delay period,
the relay will open.
2. If the measured vibration variable exceeds the upper limit value
of the switching threshold LIM2 of the window area for longer than the set delay period,
the relay will open.
3. The analog current output depicts the vibration variable measured in the interval
between 4 mA and 20 mA. The vibration variable is the vibration acceleration.
Note
The next control device must trigger the shutdown should the current output deliver
more than 20 mA.
Note
See corresponding datasheets for further information.

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Planning
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3.3 Characteristic Safety Values
3.4 Useful Lifetime
The measuring system has a useful lifetime of 10 years.
Parameters Characteristic values
Assessment type and documentation Full assessment
Device type B
Mode of operation Low demand mode or high demand mode
SIL 2
PL d
DC/DCavg 95 %
Category 2
sd 600 FIT
dd 350 FIT
no part 80
total (safety function) 1030 FIT
du 15 FIT
dd 350 FIT
SFF 94 %
PFD 10-3 to < 10 -2
PFH < 2 x 10 -7 1/h 1
1With an average expected requirement rate of fewer than 25 times per year
MTTF 112.43 years
MTTFd329.85 years (high)
CCF 95 (fulfilled)
Reacktion time 200 ms
Table 3.1

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Functional Safety Vibration Sensor VIM8*
Mounting, Installation and Commissioning
4 Mounting, Installation and Commissioning
Mounting and Installing the Device with Pre-Alarm and Main Alarm
1. Observe the safety instructions in the instruction manual.
2. Observe the information in the manual.
3. Observe the requirements for the safety loop.
4. Connect the device only to devices that are suitable for this safety application.
•Depending on the sensor version, connect the pre-alarm (output 1) to pins 5 and 6
or to cables GR and RS.
•Depending on the sensor version, connect the pre-alarm (output 2) to pins 7 and 8
or to cables BU and RD.
•Depending on the sensor version, connect the vibration variable output (output 3) to pin 3
or to cable GN.
•Connect the supply to pin 1 or to cable WH. The sensor must be powered
by a SELV power supply in safe operation.
5. Check the safety function to ensure the expected output behavior.
Select the limit values so that the safety function is triggered before any damage can be done
to the system.
Mounting and Installing the Device with Window Function
1. Observe the safety instructions in the instruction manual.
2. Observe the information in the manual.
3. Observe the requirements for the safety loop.
4. Connect the device only to devices that are suitable for this safety application.
•Depending on the sensor version, connect the lower switching threshold (output 1)
to pins 5 and 6 or to cables GR and RS.
•Depending on the sensor version, connect the upper switching threshold (output 2)
to pins 7 and 8 or to cables BU and RD.
•Depending on the sensor version, connect the vibration variable output (output 3) to pin 3
or to cable GN.
•Connect the supply to pin 1 or to cable WH. The sensor must be powered by
a SELV power supply in safe operation.
5. Check the safety function to ensure the expected output behavior.
Select the limit values so that the safety function is triggered before any damage can be done
to the system.

Functional Safety Vibration Sensor VIM8*
Mounting, Installation and Commissioning
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4.1 Parameterization
Parameterizing the Device
The device is parameterized via HEX switches LIM1,LIM2 and TIME. The HEX switches
are on the front of the device.
1. The safety function is disabled during the parameterization. Take measures to maintain
the safety function while the device is being parameterized.
2. Open the cover.
3. Briefly press the Save Config button.
The current parameterization is indicated by the LEDs on the HEX switches.
4. Parameterize the limit values and delay times by using the respective HEX switch.
As soon as a switch position is changed, all LEDs start flashing.
5. Press and hold the Save Config button for 3 seconds to save the parameterization.
The acceptance of the parameterization is indicated by steady lighting up of the LEDs
in the selected HEX switch position. After about 5 minutes the LEDs turn off automatically.
6. Close the cover.
The measured signal is only validated again after leaving the parameterization mode
and meets the requirements for the safety function.
Note
For concrete details regarding the adjustable limit values and delay times,
please refer to the manual.
Note
For more information see the manual.

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Functional Safety Vibration Sensor VIM8*
Operation
5 Operation
Operating the device
1. Observe the safety instructions in the instruction manual.
2. Observe the information in the manual.
3. Use the device only with devices that are suitable for this safety application.
4. Correct any occurring safe failures. Take measures to maintain the safety function
while the device is being repaired.
The device has 2 limit values LIM1 and LIM2 and the corresponding delay times.
The delay times can be adjusted separately.
If the defined limit value is exceeded and after the set delay time has expired,
the corresponding volt-free switching contact is opened.
A subsequent fall below the limit value is also signaled at volt-free switching contacts 1 and 2,
i. e. the respective switching contact automatically closes.
•This is used for a device with pre-alarm and main alarm to generate a pre-alarm
and a main alarm.
•This is used for a device with window function to generate a signal for the lower
and upper switching threshold.
The device also has an analog current output. This supplies direct current of 4 mA to 20 mA
proportional to the vibration variable.
Danger!
Danger to life from missing safety function
If the safety loop is put out of service, the safety function is no longer guaranteed.
•Do not deactivate the device.
•Do not bypass the safety function.
•Do not repair, modify, or manipulate the device.

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Operation
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5.1 Proof Test and Self-Diagnostics
The sensor has a set of self-diagnostic measures. These are divided into 2 categories:
Start-up Diagnostics
These tests are only run in the sensor’s initial start-up phase. Among other things,
hardware-critical pathways are tested here that cannot be switched off once the device
is in operation.
One of these critical tests is the diagnostics of the switching outputs:
•On a device with pre-alarm and main alarm for the pre-alarm and the main alarm
•On a device with window function for the lower and upper switching thresholds
In order to ensure the functionality of the switching outputs over the product’s useful lifetime,
the system operator must make sure to cycle the power on the vibration sensor once a year.
Cyclical Monitoring
The cyclical monitoring is fully automated and ensures that all tests are performed
and evaluated within 12 hours for a diagnostic coverage of > 90 %.

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Functional Safety Vibration Sensor VIM8*
Maintenance and Repair
6 Maintenance and Repair
Maintaining or Replacing the Device
In case of maintenance or replacement of the device, proceed as follows:
1. Implement appropriate maintenance procedures for regular maintenance of the safety loop.
2. While the device is maintained or replaced, the safety function does not work.
Exception: The safety function is still guaranteed if the device is operated in redundancy.
Take appropriate measures to protect personnel and equipment while the safety function
is not available.
Secure the application against accidental restart.
3. Do not repair a defective device.
4. If there is a defect, always replace the device with an original device.
Reporting Device Failure
If you use the device in a safety loop according to IEC/EN 61508, it is required to inform
the device manufacturer about possible systematic failures.
Report all failures in the safety function that are due to functional limitations or a loss
of device function – especially in the case of possible dangerous failures.
In these cases, contact your local sales partner or the Pepperl+Fuchs technical sales support
(service line).
It is not necessary to report failures in the safety function that are due to external influences
or damage.
Danger!
Danger to life from missing safety function
Changes to the device or a defect of the device can lead to device malfunction.
The function of the device and the safety function is no longer guaranteed.
Do not repair, modify, or manipulate the device.

Functional Safety Vibration Sensor VIM8*
List of Abbreviations
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7 List of Abbreviations
CAT Category according to EN ISO 13849-1:2008
CCF Common Cause Failure
DC/DCavg Diagnostic Coverage/Average Diagnostic Coverage
FIT Failure In Time, 1 FIT = 1 failure / 10 h
FMEDA Failure Mode, Effects, and Diagnostics Analysis
sd Probability of safe detected failure
su Probability of safe undetected failure
not part Probability of failure of components that are not in the safety loop
total (safety function) Probability of failure of components that are in the safety loop
dd Probability of dangerous detected failure
du Probability of dangerous undetected failure
HFT Hardware Fault Tolerance
MTBF Mean Time Between Failures
MTTF Mean Time ToFailure
MTTFDMean Time To dangerous Failure
MTTR Mean Time To Restoration
PFDavg Average Probability of dangerous Failure on Demand
PFH Average frequency of dangerous failure per hour
SFF Safe Failure Fraction
SIL Safety Integrity Level

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