Pepperl+Fuchs KD0-RSH-1.1E.1 Series User manual

ISO9001
3
Functional Safety
Relay Module
K*D0-RSH-1.1E.1,
HiC5863(Y1)
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"
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 K*D0-RSH-1.1E.1, HiC5863(Y1)
Contents
2021-10
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 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
2.3 Marking . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
2.4 Standards and Directives for Functional Safety . . . . . . . . . . . . . . . . . . . 9
3 Planning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
3.1 System Structure. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
3.2 Assumptions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
3.3 Safety Function and Safe State . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
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

Functional Safety K*D0-RSH-1.1E.1, HiC5863(Y1)
Contents
4
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Functional Safety K*D0-RSH-1.1E.1, HiC5863(Y1)
Introduction
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5
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
•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.

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Functional Safety K*D0-RSH-1.1E.1, HiC5863(Y1)
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 K*D0-RSH-1.1E.1, HiC5863(Y1)
Product Description
2 Product Description
2.1 Function
General
This signal conditioner provides the galvanic isolation between field circuits and control
circuits.
The energized to safe (ETS) function is permitted for SIL 3 applications.
For testing of the relays, test terminals can be used. The test mode will be indicated by a LED.
KCD0-RSH-1.1E.1, KFD0-RSH-1.1E.1
The device is a relay module that is suitable for safely switching applications of a load circuit.
The device isolates load circuits up to 230 V AC and the 24 V DC control circuit.
The device is mounted on a 35 mm DIN mounting rail according to EN 60715.
HiC5863
The device is a relay module that is suitable for safely switching applications of a load circuit.
The device isolates load circuits up to 30 V and the 24 V control circuit.
This device mounts on a HiC termination board.
HiC5863Y1
The device is a relay module that is suitable for safely switching applications of a load circuit.
The device isolates load circuits up to 230 V AC/30 V DC and the 24 V DC control circuit.
This device mounts on a HiC termination board.
2.2 Interfaces
The device has the following interfaces.
•Safety-relevant interfaces: input, output (ETS)
•The test input may not be used during normal operation. The test input may be used
for test only.
2.3 Marking
Note
For corresponding connections see datasheet.
Pepperl+Fuchs Group
Lilienthalstraße 200, 68307 Mannheim, Germany
Internet: www.pepperl-fuchs.com
KFD0-RSH-1.1E.1, KCD0-RSH-1.1E.1, HiC5863, HiC5863Y1 Up to SIL 3

Functional Safety K*D0-RSH-1.1E.1, HiC5863(Y1)
Product Description
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2.4 Standards and Directives for Functional Safety
Device specific standards and directives
System-specific standards and directives
Functional safety IEC/EN 61508, part 1 –7, edition 2010:
Functional safety of electrical/electronic/programmable
electronic safety-related systems (manufacturer)
Functional safety IEC 61511-1:2016+COR1:2016+A1:2017
EN 61511-1:2017+A1:2017
Functional safety –Safety instrumented systems
for the process industry sector (user)

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Functional Safety K*D0-RSH-1.1E.1, HiC5863(Y1)
Planning
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:
•the PFDavg value (average Probability of dangerous Failure on Demand)
and the T1 value (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:
•the PFH value (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 the elements and subsystems, but not of a single device.
Nevertheless the SFF of the device is given in this document for reference.

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Planning
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3.2 Assumptions
The following assumptions have been made during the FMEDA:
•Failure rates are constant, wear is not considered.
•Failure rate based on the Siemens standard SN 29500.
•The safety-related device is considered to be of type A device with a hardware
fault tolerance of 0.
•The device will be used under average industrial ambient conditions comparable
to the classification "stationary mounted" according to MIL-HDBK-217F.
Alternatively, 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 may be assumed. 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.
•The nominal voltage at the digital input is 24 V. Ensure that the nominal voltage
do not exceed 30 V under all operating conditions.
•The DO card must be able to supply a signal current of at least 100 mA.
SIL 3 application
•To build a SIL safety loop for the defined SIL, it is assumed as an example that this device
uses 10 % of the available budget for PFDavg/PFH.
•For a SIL 3 application operating in low demand mode the total PFDavg value
of the SIF (Safety Instrumented Function) should be smaller than 10-3,
hence the maximum allowable PFDavg value would then be 10-4.
•For a SIL 3 application operating in high demand mode the total PFH value
of the SIF should be smaller than 10-7 per hour, hence the maximum allowable PFH value
would then be 10-8 per hour.
•If the device is used in applications for high demand mode, perform a risk analysis
regarding systematic faults and implement suitable measures to control these systematic
faults. For example, this can be the following measures:
•usage of redundant power supplies,
•monitoring of input signal, wiring and connections for short circuits and open circuits,
•monitoring the output for open circuits.
•Since the safety loop has a hardware fault tolerance of 0 and it is a type A device,
the SFF must be > 90 % according to table 2 of IEC/EN 61508-2 for a SIL 3 (sub) system.

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Functional Safety K*D0-RSH-1.1E.1, HiC5863(Y1)
Planning
SILCL and PL application
•The standards IEC/EN 62061 and EN/ISO 13849-1 require that the safety device
is implemented according to the idle current principle. As the device is implemented
following the working current principle, no safety classification according
to IEC/EN 62061 and EN/ISO 13849-1 was carried out. If you use the device
in machinery safety applications, assess the specific application and show
that an equivalent safety level will be achieved.
3.3 Safety Function and Safe State
Safety Function
The safety function of the device is defined: Whenever the input of the device is energized,
the ETS output is conducting.
Safe State
In the safe state of the safety function the ETS output is closed (conducting).
Reaction Time
The reaction time is < 150 ms.

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Planning
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3.4 Characteristic Safety Values
The characteristic safety values like PFD, PFH, SFF, HFT and T1 are taken
from the FMEDA report. Observe that PFD and T1 are 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
Safety function ETS
HFT 0
SIL 3
SC 3
s150 FIT
dd 0 FIT
du 1
1Only use the device in safety relevant applications with the following termination boards:
FC-GPCS-SDO08-PF
SC-GPCS-UNI16-PF
FC-GPCS-RIO16-PF
HiCTB32-TRI-DOISS-EL-PL-Y1
HiCTB16-TRI-DOISS-EL-PL-Y1
HiCTB16-TRX-RAC-PL-IO16
HiCTB16-YRS-RRB-AK-CC-DO16-Y1
HiCTB16-SDC-24C-SC-RA
HiCTB16-SCT-44C-SC-RA
Generally: Add 2.5 FIT to the overall failure rate for dangerous undetected failures.
Exception for HiCTB16-TRX-RAC-PL-IO16 Termination Board: Add 1.5 FIT to the overall failure rate for dangerous undetected
failures.
Recalculate the necessary safety relevant values for your safety evaluation. Contact Pepperl+Fuchs for information on using
other termination boards.
2.21 FIT
total (safety function) 152 FIT
SFF 2
2The SFF value was not calculated according to IEC/EN 61508-2.
98.6 %
MTBF 3
3acc. to SN29500. This value includes failures which are not part of the safety function/MTTR = 8 h.
151 years
MTTFd> 2500 years
PTC 100 %
PFH 2.21 x 10-9 1/h
PFDavg for T1 = 5 years 4.84 x 10-5
PFDavg for T1 = 10 years 9.7 x 10-5
T1 max. 4
4If the device claims less than 10 % of the signal loop budget, T1 can be chosen higher.
10 years
Table 3.1

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Functional Safety K*D0-RSH-1.1E.1, HiC5863(Y1)
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, 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.
The standard EN/ISO 13849-1:2015 proposes a useful lifetime TM of 20 years for devices
used within industrial environments. This device is designed for this lifetime.
Observe that the useful lifetime can be reduced if the device is exposed to the following
conditions:
•highly stressful environmental conditions such as constantly high temperatures
•temperature cycles with high temperature differences
•permanent repeated mechanical stress (vibration)
As noted in DIN EN 61508-2:2011 note N3, appropriate measures taken by the manufacturer
and plant operator can extend the useful lifetime.
Please note that the useful lifetime refers to the (constant) failure rate of the device.
The effective lifetime can be higher.
The estimated useful lifetime is greater than the warranty period prescribed by law
or the manufacturer's guarantee period. However, this does not result in an extension
of the warranty or guarantee services. Failure to reach the estimated useful lifetime is not
a material defect.
Derating
For the safety application, reduce the number of switching cycles or the maximum current.
A derating to 2/3 of the maximum value is adequate.
Maximum Switching Power of Output Contacts
The useful lifetime is limited by the maximum switching cycles of the relays under load
conditions.
For requirements regarding the connected output load, refer to the documentation
of the connected peripheral devices.
Note
See corresponding datasheets for further information.

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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
A configuration of the device is not necessary and not possible.

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Functional Safety K*D0-RSH-1.1E.1, HiC5863(Y1)
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 within 8 hours. Take measures to maintain the safety
function while the device is being repaired.
5.1 Proof Test
This section describes a possible proof test procedure. The user is not obliged to use
this proposal. The user may consider different concepts with an individual determination
of the respective effectiveness, e. g. concepts according to NA106:2018.
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.
Check the settings after the configuration by suitable tests.
Equipment required:
•Use a digital multimeter (without special accuracy) as ohmmeter (mid range
recommended) to check the relay contact outputs. Closed contacts are shown with 0 
(low impedance). Open contacts are shown with OL (overload/high impedance).
•Power supply set to nominal voltage of 24 V DC
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 K*D0-RSH-1.1E.1, HiC5863(Y1)
Operation
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Proof Test Procedure
1. Disconnect the field circuit.
2. Check the device as shown in the following tables.
3. After check reset the device to the necessary settings.
4. Connect the field circuit again.
5. Check the correct behavior of the safety loop. Is the configuration correct?
Test No. Input or Test Input Output (mA)
1 VTest 1 = 24 V DC
between terminals 10+ and 9- •ETS output (terminals 2, 3): shows < 10 
•LED TST is flashing
2 VTest 2 = 24 V DC
between terminals 11+ and 9- •ETS output (terminals 2, 3): shows < 10 
•LED TST is flashing
3 VTest 3 = 24 V DC
between terminals 12+ and 9- •ETS output (terminals 2, 3): shows < 10 
•LED TST is flashing
4 VTest = 24 V DC
between terminals 10+, 11+, 12+ and 9- •ETS output (terminals 2, 3): shows < 10 
•LED TST is flashing
5 VTest = 0 V DC
between terminals 10+, 11+, 12+ and 9- •ETS output (terminals 2, 3): OL (overload)
•LED TST is off
6 Vinput = 24 V DC
between terminals 7+ and 8- with regular input
polarity
between terminals 7- and 8+ with inverted input
polarity
•ETS output (terminals 2, 3): shows < 10 
•LED OUT is on
Table 5.1 Expected test results for the proof test of KFD0-RSH-1.1E.1

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Functional Safety K*D0-RSH-1.1E.1, HiC5863(Y1)
Operation
Test No. Input or Test Input Output (mA)
1 VTest 1 = 24 V DC
between terminals 7+ and 8- •ETS output (terminals 1, 2): shows < 10 
•LED TST is flashing
2 VTest 2 = 24 V DC
between terminals 9+ and 8- •ETS output (terminals 1, 2): shows < 10 
•LED TST is flashing
3 VTest 3 = 24 V DC
between terminals 10+ and 8- •ETS output (terminals 1, 2): shows < 10 
•LED TST is flashing
4 VTest = 24 V DC
between terminals 7+, 9+, 10+ and 8- •ETS output (terminals 1, 2): shows < 10 
•LED TST is flashing
5 VTest = 0 V DC
between terminals 7+, 9+, 10+ and 8- •ETS output (terminals 1, 2): OL (overload)
•LED TST is off
6 Vinput = 24 V DC
between terminals 5+ and 6- with regular input
polarity
between terminals 5- and 6+ with inverted input
polarity
•ETS output (terminals 1, 2): shows < 10 
•LED OUT is on
Table 5.2 Expected test results for the proof test of KCD0-RSH-1.1E.1
Test No. Input or Test Input Output (mA)
1 VTest = 24 V DC
between terminals 3b+ and 3a- •ETS output (terminals 5a, 5b): shows < 10 
•LED TST is flashing
2 VTest = 24 V DC
between terminals 4a+, and 3a- •ETS output (terminals 5a, 5b): shows < 10 
•LED TST is flashing
3 VTest = 24 V DC
between terminals 4b+ and 3a- •ETS output (terminals 5a, 5b): shows < 10 
•LED TST is flashing
4 VTest = 24 V DC
between terminals 4a+, 3b+, 4b+, and 3a- •ETS output (terminals 5a, 5b): shows < 10 
•LED TST is flashing
5 VTest = 0 V DC
between terminals 4a+, 3b+, 4b+, and 3a- •ETS output (terminals 5a, 5b): OL
(overload)
•LED TST is off
6 Vinput = 24 V DC
between terminals 8a+ and 7a- with regular
input polarity
•ETS output (terminals 5a, 5b): shows < 10 
•LED OUT is on
Table 5.3 Expected test results for the proof test of HiC5863

Functional Safety K*D0-RSH-1.1E.1, HiC5863(Y1)
Operation
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Only if all tests are successfully done, the proof test is successful.
Test No. Input or Test Input Output (mA)
1 VTest = 24 V DC
between terminals 3b+ and 3a- •ETS output (terminals 1a, 5a): shows < 10 
•LED TST is flashing
2 VTest = 24 V DC
between terminals 4a+, and 3a- •ETS output (terminals 1a, 5a): shows < 10 
•LED TST is flashing
3 VTest = 24 V DC
between terminals 4b+ and 3a- •ETS output (terminals 1a, 5a): shows < 10 
•LED TST is flashing
4 VTest = 24 V DC
between terminals 4a+, 3b+, 4b+, and 3a- •ETS output (terminals 1a, 5a): shows < 10 
•LED TST is flashing
5 VTest = 0 V DC
between terminals 4a+, 3b+, 4b+, and 3a- •ETS output (terminals 1a, 5a): OL
(overload)
•LED TST is off
6 Vinput = 24 V DC
between terminals 8a+ and 7a- with regular
input polarity
•ETS output (terminals 1a, 5a): shows < 10 
•LED OUT is on
Table 5.4 Expected test results for the proof test of HiC5863Y1

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Functional Safety K*D0-RSH-1.1E.1, HiC5863(Y1)
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.
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.