Pepperl+Fuchs KCD2-SON-Ex Series User manual

ISO9001
2
Functional Safety
Switch Amplifier
KCD2-SON-Ex*(.R*)(.SP)
PROCESS AUTOMATION
MANUAL

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"
Functional Safety KCD2-SON-Ex*(.R*)(.SP)

Functional Safety KCD2-SON-Ex*(.R*)(.SP)
Content
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1 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
1.1 Content of this Document. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
1.2 Safety Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
1.3 Symbols Used . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
2 Product Description. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
2.1 Function . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
2.2 Interfaces . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
2.3 Marking . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
2.4 Standards and Directives for Functional Safety . . . . . . . . . . . . . . . . . . 8
3 Planning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
3.1 System Structure. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
3.2 Assumptions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
3.3 Safety Function and Safe State . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
3.4 Characteristic Safety Values . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
3.5 Useful Lifetime . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
4 Mounting and Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
4.1 Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
5 Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
5.1 Proof Test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
6 Maintenance and Repair . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
7 List of Abbreviations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21

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Functional Safety KCD2-SON-Ex*(.R*)(.SP)
Introduction
1Introduction
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
•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.

Functional Safety KCD2-SON-Ex*(.R*)(.SP)
Introduction
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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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Functional Safety KCD2-SON-Ex*(.R*)(.SP)
Introduction
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.

Functional Safety KCD2-SON-Ex*(.R*)(.SP)
Product Description
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2 Product Description
2.1 Function
General
This devices are used for intrinsic safety applications.
The devices transfer digital signals (NAMUR sensors or dry contacts) from the hazardous area
to the non-hazardous area.
The devices offer line fault transparency on the signal lines.
A fault is signalized by LEDs and a separate collective error message output.
Via switches the mode of operation can be reversed and the line fault detection
can be switched off.
The devices are available with screw terminals or spring terminals. The type code of
the versions of the devices with spring terminals has the extension ".SP".
The devices are mounted on a 35 mm DIN mounting rail according to EN 60715.
KCD2-SON-Ex1(.SP)
The input controls two passive transistor outputs with a resistive output characteristic
(acc. to EN60947-5-6).
The outputs have three defined states: 1-signal = 1.8 k, 0-signal = 14 kand fault > 100 k.
KCD2-SON-Ex1.R1
The input controls two passive transistor outputs with a resistive output characteristic.
The outputs have three defined states: 1-signal = 6.5 V voltage drop, 0-signal = 33 kand
6.5 V voltage drop and fault > 100 k.
KCD2-SON-Ex1.R2
The input controls two passive transistor outputs with a resistive output characteristic.
The outputs have three defined states: 1-signal = 5 k, 0-signal = 15 kand fault > 100 k.
KCD2-SON-Ex1.R3
The input controls two passive transistor outputs with a resistive output characteristic.
The outputs have three defined states: 1-signal = 100 ... 600 , 0-signal = 19 kand
fault > 100 k.
KCD2-SON-Ex2(.SP)
Each input controls a passive transistor output with a resistive output characteristic
(acc. to EN60947-5-6).
The outputs have three defined states: 1-signal = 1.8 k, 0-signal = 14 kand fault > 100 k.

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Functional Safety KCD2-SON-Ex*(.R*)(.SP)
Product Description
KCD2-SON-Ex2.R1
Each input controls a passive transistor output with a resistive output characteristic.
The outputs have three defined states: 1-signal = 6.5 V voltage drop, 0-signal = 33 kand
6.5 V voltage drop and fault > 100 k.
KCD2-SON-Ex2.R2
Each input controls a passive transistor output with a resistive output characteristic.
The outputs have three defined states: 1-signal = 5 k, 0-signal = 15 kand fault > 100 k.
KCD2-SON-Ex2.R3
Each input controls a passive transistor output with a resistive output characteristic.
The outputs have three defined states: 1-signal = 100 ... 600 , 0-signal = 19 kand
fault > 100 k.
2.2 Interfaces
The device has the following interfaces.
• Safety-relevant interfaces:
KCD2-SON-Ex1(.R*)(.SP): input I, output I, output II (optional)
KCD2-SON-Ex2(.R*)(.SP): input I, input II, output I, output II
• Non-safety-relevant interfaces: fault output
2.3 Marking
2.4 Standards and Directives for Functional Safety
Device specific standards and directives
System-specific standards and directives
Note!
For corresponding connections see datasheet.
Pepperl+Fuchs GmbH
Lilienthalstraße 200, 68307 Mannheim, Germany
Internet: www.pepperl-fuchs.com
KCD2-SON-Ex1, KCD2-SON-Ex1.SP, KCD2-SON-Ex1.R1,
KCD2-SON-Ex1.R2, KCD2-SON-Ex1.R3,
KCD2-SON-Ex2, KCD2-SON-Ex2.SP, KCD2-SON-Ex2.R1,
KCD2-SON-Ex2.R2, KCD2-SON-Ex2.R3
Up to SIL 2
Functional safety IEC/EN 61508, part 1 –7, edition 2010:
Functional safety of electrical/electronic/programmable
electronic safety-related systems (manufacturer)
Functional safety IEC/EN 61511, part 1 –3, edition 2016:
Functional safety –Safety instrumented systems for the
process industry sector (user)

Functional Safety KCD2-SON-Ex*(.R*)(.SP)
Planning
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3 Planning
3.1 System Structure
3.1.1 Low Demand Mode of Operation
If there are two control loops, one for the standard operation and another one for the
functional safety, then usually the demand rate for the safety loop is assumed to be less
than once per year.
The relevant safety parameters to be verified are:
•thePFD
avg value (average Probability of dangerous Failure on Demand) and the
T1value (proof test interval that has a direct impact on the PFDavg value)
• the SFF value (Safe Failure Fraction)
• the HFT architecture (Hardware Fault Tolerance)
3.1.2 High Demand or Continuous Mode of Operation
If there is only one safety loop, which combines the standard operation and safety-related
operation, then usually the demand rate for this safety loop is assumed to be higher
than once per year.
The relevant safety parameters to be verified are:
•thePFHvalue(Probability of dangerous Failure per Hour)
• Fault reaction time of the safety system
• the SFF value (Safe Failure Fraction)
• the HFT architecture (Hardware Fault Tolerance)
3.1.3 Safe Failure Fraction
The safe failure fraction describes the ratio of all safe failures and dangerous detected failures
to the total failure rate.
SFF = (s+ dd) / (s+ dd + du)
A safe failure fraction as defined in IEC/EN 61508 is only relevant for elements or (sub)systems
in a complete safety loop. The device under consideration is always part of a safety loop
but is not regarded as a complete element or subsystem.
For calculating the SIL of a safety loop it is necessary to evaluate the safe failure fraction
of elements, subsystems and the complete system, but not of a single device.
Nevertheless the SFF of the device is given in this document for reference.

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Functional Safety KCD2-SON-Ex*(.R*)(.SP)
Planning
3.2 Assumptions
The following assumptions have been made during the FMEDA:
• The device shall claim less than 10 % of the total failure budget for a SIL 2 safety loop.
• For a SIL 2 application operating in low demand mode the total PFDavg value of the
SIF (Safety Instrumented Function) should be smaller than 10-2, hence the maximum
allowable PFDavg value would then be 10-3.
• For a SIL 2 application operating in high demand mode the total PFH value of the
SIF should be smaller than 10-6 per hour, hence the maximum allowable PFH value would
then be 10-7 per hour.
• The safety-related device is considered to be of type Adevice with a hardware fault
tolerance of 0.
• Since the safety loop has a hardware fault tolerance of 0and it is a type Adevice,
the SFF must be > 60 % according to table 2 of IEC/EN 61508-2 for a SIL 2 (sub) system.
• Failure rate based on the Siemens standard SN29500.
• Failure rates are constant, wear is not considered.
• External power supply failure rates are not included.
• The stress levels are average for an industrial environment and the environment is similar
to IEC/EN 60654-1 Class C (sheltered location) with temperature limits in the range
of the manufacturer's specifications and an average temperature of 40 ºC over a long
period. The humidity level is within manufacturer's rating.
• The listed failure rates are valid for operating stress conditions typical of an industrial field
environment similar to IEC/EN 60654-1 Class C with an average temperature over a long
period of time of 40 ºC. For a higher average temperature of 60 ºC, the failure rates must
be multiplied by a factor of 2.5 based on experience. A similar factor must be used
if frequent temperature fluctuations are expected.
• Since the outputs of the device use common components, these outputs must not be used
in the same safety function.
• The indication of a dangerous failure (via fault bus) is detected within 1 hour
by the programmable logic controller (PLC).
• The collective error message output is not considered in the FMEDA and
in the calculations.

Functional Safety KCD2-SON-Ex*(.R*)(.SP)
Planning
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3.3 Safety Function and Safe State
Safe State
The safe state of output I and output II is the high impedance state or the fault state.
The fault state is the open circuit. The high impedance state is defined as 0-signal
in respective datasheet.
Safety Function
The safety function has 2 modes of operation:
• normal operation (output follows input)
• inverted operation (output inverts input)
The 1-channel devices have 2 outputs where output II may be used in safety-relevant
applications if it is configured to follow output I.
Here are the DIP switch settings for all channels used in safety-relevant applications:
DIP Switch Settings 1-channel Devices
DIP Switch Settings 2-channel Devices
Function Mode KCD2-SON-Ex1(.R*)(.SP)
Output mode Normal operation S1 position I
Inverted operation S1 position II
Line fault detection ON S3 position I
OFF 1 S3 position II
Table 3.1
1This switch setting may not be used if the device is used for safety-relevant applications.
Function Mode KCD2-SON-Ex2(.R*)(.SP)
Mode channel I Normal operation S1 position I
Inverted operation S1 position II
Mode channel II Normal operation S2 position I
Inverted operation S2 position II
Line fault detection channel I ON S3 position I
OFF1S3 position II
Line fault detection channel II ON S4 position I
OFF 1 S4 position II
Table 3.2
1This switch setting may not be used if the device is used for safety-relevant applications.

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Functional Safety KCD2-SON-Ex*(.R*)(.SP)
Planning
LB/SC Diagnosis
The input loops of all versions are supervised, if the line fault detection is active
(mandatory, see datasheet). The related safety function is defined as the outputs are
in fault state (safe state), if there is a line fault detected.
Note!
The collective error message output is not safety-relevant.
Note!
See corresponding datasheets for further information.

Functional Safety KCD2-SON-Ex*(.R*)(.SP)
Planning
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3.4 Characteristic Safety Values
The characteristic safety values like PFD, PFH, SFF, HFT and T1are taken from
the FMEDA report. Observe that PFD and T1are related to each other.
The function of the devices has to be checked within the proof test interval (T1).
Parameters Characteristic values
Assessment type and
documentation
Full assessment
Device type A
Mode of operation Low demand mode or high demand mode
HFT 0
SIL (hardware) 2
Safety function Inverted operation 1
1The device can be used in 2 modes of operation, inverted operation and normal operation.
Normal operation 1
safe2
2"Annunciation failures" do not directly influence the safety function and are therefore not considered.
108 FIT 109 FIT
dd 3.3 FIT 3.3 FIT
du326.0 FIT 24.2 FIT
total (safety function) 137 FIT 136 FIT
SFF 81 % 82 %
MTBF 3
3acc. to SN29500. This value includes failures which are not part of the safety function/MTTR = 8 h.
The value is valid for one channel only.
328 years 328 years
PFH 2.60 x 10-8 1/h 2.42 x 10-8 1/h
PFDavg for T1= 1 year 1.14 x 10-4 1.12 x 10-4
PFDavg for T1= 2 years 2.28 x 10-4 2.24 x 10-4
PFDavg for T1= 5 years 5.69 x 10-4 5.59 x 10-4
Reaction time 4
4Time between fault detection and fault reaction
<20ms
Table 3.3

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Functional Safety KCD2-SON-Ex*(.R*)(.SP)
Planning
3.5 Useful Lifetime
Although a constant failure rate is assumed by the probabilistic estimation this only applies
provided that the useful lifetime of components is not exceeded. Beyond this useful lifetime,
the result of the probabilistic estimation is meaningless as the probability of failure significantly
increases with time. The useful lifetime is highly dependent on the component itself and its
operating conditions –temperature in particular. For example, the electrolytic capacitors can
be very sensitive to the operating temperature.
This assumption of a constant failure rate is based on the bathtub curve, which shows
the typical behavior for electronic components.
Therefore it is obvious that failure calculation is only valid for components that have
this constant domain and that the validity of the calculation is limited to the useful lifetime
of each component.
It is assumed that early failures are detected to a huge percentage during the installation
and therefore the assumption of a constant failure rate during the useful lifetime is valid.
However, according to IEC/EN 61508-2, a useful lifetime, based on general experience,
should be assumed. Experience has shown that the useful lifetime often lies within a range
periodofabout8to12years.
As noted in DIN EN 61508-2:2011 note N3, appropriate measures taken by the manufacturer
and plant operator can extend the useful lifetime.
Our experience has shown that the useful lifetime of a Pepperl+Fuchs product can be higher
if the ambient conditions support a long life time, for example if the ambient temperature
is significantly below 60 °C.
Please note that the useful lifetime refers to the (constant) failure rate of the device.
The effective life time can be higher.

Functional Safety KCD2-SON-Ex*(.R*)(.SP)
Mounting and Installation
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4 Mounting and Installation
Mounting and Installing the Device
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.
5. Check the safety function to ensure the expected output behavior.
4.1 Configuration
Configuring the Device
The device is configured via DIP switches. The DIP switches for setting the safety functions
are on the front of the device.
1. De-energize the device before configuring the device.
2. Open the cover.
3. Configure the device for the required safety function via the DIP switches, see chapter 3.3.
4. Close the cover.
5. Secure the DIP switches to prevent unintentional adjustments.
6. Connect the device again.
Note!
See corresponding datasheets for further information.

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Functional Safety KCD2-SON-Ex*(.R*)(.SP)
Operation
5Operation
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 within 8 hours. Take measures to maintain the
safety function while the device is being repaired.
5.1 Proof Test
According to IEC/EN 61508-2 a recurring proof test shall be undertaken to reveal potential
dangerous failures that are not detected otherwise.
Check the function of the subsystem at periodic intervals depending on the applied
PFDavg in accordance with the characteristic safety values. See chapter 3.4.
It is under the responsibility of the plant operator to define the type of proof test and
the interval time period.
Equipment required:
• Digital multimeter without special accuracy
Use for the proof test of the intrinsic safety side of the device a special digital multimeter
for intrinsically safe circuits.
If intrinsically safe circuits are operated with non-intrinsically safe circuits, they must
no longer be used as intrinsically safe circuits.
• Dual power supply, set to 24 V DC respective 8 V DC (NAMUR voltage).
• Load resistor R. See table, value R.
• Sensor simulator:
• Potentiometer of 4.7 k(threshold for normal operation)
•Resistorof220(short circuit detection)
•Resistorof150k(lead breakage detection)
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.

Functional Safety KCD2-SON-Ex*(.R*)(.SP)
Operation
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Proof Test Procedure
1. Test in the proof test with the same configuration which is used in the application.
2. Attach a load and supply defined by the application's current and voltage.
3. Substitute the sensors by sensor simulators
4. Test the respective input channel. The threshold must be between 1.4 mA and 1.9 mA.
The hysteresis must be between 170 A and 250 A.
For normal operation the corresponding yellow LED must have lit, if the input current
is above the threshold. See table, value Ion.
For inverted operation the corresponding yellow LED must have lit, if the input current
is below the threshold. See table, value Ion.
5. Connect a resistor RSC (220 ) or a resistor RLB (150 k) to the input.
The device must detect an external fault for the eruptive channel. This state is indicated
by red LED and the output of the corresponding channel shall be in fault state.
6. Test, that the outputs are definitely high impedant if the yellow LED is off.
See table, values Ioff.
7. Set the device back to the original settings after the test.
8. Check the settings after the configuration by suitable tests.
Device R U Ion Ioff Ifault
KCD2-SON-Ex*(.SP) 1k8V 2.6 mA < Ion <3.2mA 0.5 mA < Ioff <0.6mA <0.05mA
KCD2-SON-Ex*.R1 2k24 V 8.0 mA < Ion <9.2mA 0.46 mA < Ioff <0.62mA <0.05mA
KCD2-SON-Ex*.R2 250 24 V 4.2 mA < Ion <4.6mA 1.48 mA < Ioff <1.62mA <0.05mA
KCD2-SON-Ex*.R3 4.3 k24 V 4.9 mA < Ion <5.2mA 1.01 mA < Ioff <1.06mA <0.05mA
Table 5.1

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Functional Safety KCD2-SON-Ex*(.R*)(.SP)
Operation
Figure 5.1 Proof test set-up for KCD2-SON-Ex1(.SP), KCD2-SON-Ex1.R2, KCD2-SON-Ex1.R3
Figure 5.2 Proof test set-up for KCD2-SON-Ex1.R1
Zone 0, 1, 2
Div. 1, 2
Zone 2
Div. 2
Multimeter
( I)
Multimeter
( I)
R
LB
R
U
Multimeter
( I)
R
U
Fault
1+
2-
5+
6-
7+
8-
I
II
KCD2-SON-Ex1(.**)
I supply
Supply +
Supply -
24 V DC
Power
supply
Supply
Bus
R
SC
KCD2-SON-Ex1.R1
Zone 0, 1, 2
Div. 1, 2
Zone 2
Div. 2
Multimeter
( I)
Multimeter
( I)
R
LB
R
U
Multimeter
( I)
R
U
Fault
1+
2-
5+
6-
7+
8-
I
II
I supply
Supply +
Supply -
24 V DC
Power
supply
Supply
Bus
R
SC

Functional Safety KCD2-SON-Ex*(.R*)(.SP)
Operation
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19
Figure 5.3 Proof test set-up for KCD2-SON-Ex2(.SP), KCD2-SON-Ex2.R2, KCD2-SON-Ex2.R3
Figure 5.4 Proof test set-up for KCD2-SON-Ex2.R1
KCD2-SON-Ex2(.**)
Zone 0, 1, 2
Div. 1, 2
Zone 2
Div. 2
Multimeter
( I)
Multimeter
( I)
R
LB
R
U
Multimeter
( I)
R
U
Fault
1+
2-
Multimeter
( I)
R
LB
3+
4-
5+
6-
7+
8-
I
II
I
II
I supply
Supply +
Supply -
24 V DC
Power
supply
Supply
Bus
R
SC
R
SC
KCD2-SON-Ex2.R1
Zone 0, 1, 2
Div. 1, 2
Zone 2
Div. 2
Multimeter
( I)
Multimeter
( I)
R
LB
R
U
Multimeter
( I)
R
U
Fault
1+
2-
Multimeter
( I)
R
LB
3+
4-
5+
6-
7+
8-
I
II
I
II
I supply
Supply +
Supply -
24 V DC
Power
supply
Supply
Bus
R
SC
R
SC

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Functional Safety KCD2-SON-Ex*(.R*)(.SP)
Maintenance and Repair
6 Maintenance and Repair
Maintaining, Repairing or Replacing the Device
In case of maintenance, repair 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, repaired or replaced, the safety function does not work.
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. A defective device must only be repaired by
the manufacturer.
4. If there is a defect, always replace the device with an original device.
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.