Pepperl+Fuchs HiD2022 Series User manual

ISO9001
2
3
Functional Safety
SMART Transmitter Power Supply
HiD2022*, KFD2-STC5-(Ex)*,
KFD2-STV5-(Ex)*
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 HiD2022*, KFD2-STC5-(Ex)*, KFD2-STV5-(Ex)*

Functional Safety HiD2022*, KFD2-STC5-(Ex)*, KFD2-STV5-(Ex)*
Content
2017-09
3
1 Introduction. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
1.1 Contents . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
1.2 Safety Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
1.3 Symbols Used . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
2 Product Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
2.1 Function . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
2.2 Marking . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
2.3 Standards and Directives for Functional Safety. . . . . . . . . . . 12
3 Planning. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
3.1 System Structure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
3.2 Assumptions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
3.3 Safety Function and Safe State . . . . . . . . . . . . . . . . . . . . . . . . 15
3.4 Characteristic Safety Values. . . . . . . . . . . . . . . . . . . . . . . . . . . 17
3.5 Useful Life Time . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
4 Mounting and Installation . . . . . . . . . . . . . . . . . . . . . . . . 20
4.1 Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
5 Operation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
5.1 Proof Test Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
6 Maintenance and Repair . . . . . . . . . . . . . . . . . . . . . . . . . 27
7 List of Abbreviations . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
Functional Safety Manual HiD2872, HiC2873(Y1), HiD2876, HiC2877

2017-09
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Functional Safety HiD2022*, KFD2-STC5-(Ex)*, KFD2-STV5-(Ex)*
Introduction
1 Introduction
1.1 Contents
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:
•Presentdocument
• Instruction manual
•Manual
• Datasheet
Additionally, the following parts may belong to the documentation, if applicable:
• EU-type of examination
• EU declaration of conformity
• Attestation of conformity
• Certificates
• Control drawings
• FMEDA report
• Assessment report
• Additional documents
For more information about functional safety products from Pepperl+Fuchs 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 KFD2-SR3-(Ex)2.2S

Functional Safety HiD2022*, KFD2-STC5-(Ex)*, KFD2-STV5-(Ex)*
Introduction
2017-09
5
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.

2017-09
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Functional Safety HiD2022*, KFD2-STC5-(Ex)*, KFD2-STV5-(Ex)*
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 HiD2022*, KFD2-STC5-(Ex)*, KFD2-STV5-(Ex)*
Product Description
2017-09
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2ProductDescription
2.1 Function
HiD2022
This isolated barrier is used for intrinsic safety applications.
The device supplies 2-wire and 3-wire SMART transmitters, and can also be used
with 2-wire SMART current sources.
It transfers the analog input signal to the safe area as an isolated current value.
Digital signals may be superimposed on the input signal in the hazardous or non-
hazardous area and are transferred bi-directionally.
The device provides a source mode output on the safe area terminals.
This device mounts on a HiD Termination Board.
HiD2022SK
This isolated barrier is used for intrinsic safety applications.
The device supplies 2-wire and 3-wire SMART transmitters, and can also be used
with 2-wire SMART current sources.
It transfers the analog input signal to the safe area as an isolated current value.
Digital signals may be superimposed on the input signal in the hazardous or non-
hazardous area and are transferred bi-directionally.
The device provides a sink mode output on the safe area terminals.
This device mounts on a HiD Termination Board.
Functional Safety HiD2022**, KFD2-STC5-(Ex)*, KFD2-STV5-(Ex)*

2017-09
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Functional Safety HiD2022*, KFD2-STC5-(Ex)*, KFD2-STV5-(Ex)*
Product Description
KFD2-STC5-1, KFD2-STC5-2
This signal conditioner provides the galvanic isolation between field circuits and
control circuits.
The device supplies 2-wire and 3-wire SMART transmitters, and can also be used
with 2-wire SMART current sources.
It transfers the analog input signal as an isolated current value.
Digital signals may be superimposed on the input signal on the field side or on the
control side and are transferred bi-directionally.
The device provides a sink mode or a source mode output on the control side
terminals.
The device has an internal resistor. Use this resistor if the HART communication
resistance in the control circuit is too low.
Test sockets for the connection of HART communicators are integrated into the
terminals of the device.
The device is mounted on a 35 mm DIN mounting rail according to EN 60715.
KFD2-STC5-1.2O
This signal conditioner provides the galvanic isolation between field circuits and
control circuits.
The device supplies 2-wire and 3-wire SMART transmitters, and can also be used
with 2-wire SMART current sources.
It transfers the analog input signal to the control side as two isolated output
signals.
Digital signals may be superimposed on the input signal on the field side or on the
control side and are transferred bi-directionally.
The device provides a sink mode or a source mode output on the control side
terminals.
The device has an internal resistor. Use this resistor if the HART communication
resistance in the control circuit is too low.
Test sockets for the connection of HART communicators are integrated into the
terminals of the device.
The device is mounted on a 35 mm DIN mounting rail according to EN 60715.

Functional Safety HiD2022*, KFD2-STC5-(Ex)*, KFD2-STV5-(Ex)*
Product Description
2017-09
9
KFD2-STC5-Ex1(.H), KFD2-STC5-Ex2
This isolated barrier is used for intrinsic safety applications.
The device supplies 2-wire and 3-wire SMART transmitters, and can also be used
with 2-wire SMART current sources.
It transfers the analog input signal to the safe area as an isolated current value.
Digital signals may be superimposed on the input signal in the hazardous or non-
hazardous area and are transferred bi-directionally.
The device provides a sink mode or a source mode output on the safe area
terminals.
The device has an internal resistor. Use this resistor if the HART communication
resistance in the control circuit is too low.
Test sockets for the connection of HART communicators are integrated into the
terminals of the device.
The device is mounted on a 35 mm DIN mounting rail according to EN 60715.
KFD2-STC5-Ex1.2O(.H)
This isolated barrier is used for intrinsic safety applications.
The device supplies 2-wire and 3-wire SMART transmitters, and can also be used
with 2-wire SMART current sources.
It transfers the analog input signal to the safe area as two isolated output signals.
Digital signals may be superimposed on the input signal in the hazardous or non-
hazardous area and are transferred bi-directionally.
The device provides a sink mode or a source mode output on the safe area
terminals.
The device has an internal resistor. Use this resistor if the HART communication
resistance in the control circuit is too low.
Test sockets for the connection of HART communicators are integrated into the
terminals of the device.
The device is mounted on a 35 mm DIN mounting rail according to EN 60715.

2017-09
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Functional Safety HiD2022*, KFD2-STC5-(Ex)*, KFD2-STV5-(Ex)*
Product Description
KFD2-STV5-1-1, KFD2-STV5-2-1
This signal conditioner provides the galvanic isolation between field circuits and
control circuits.
The device supplies 2-wire and 3-wire SMART transmitters, and can also be used
with 2-wire SMART current sources.
It transfers the analog input signal as an isolated current value.
Digital signals may be superimposed on the input signal on the field side or on the
control side and are transferred bi-directionally.
If the HART communication resistance in the loop is too low, the internal
resistance can be used.
Test sockets for the connection of HART communicators are integrated into the
terminals of the device.
The device is mounted on a 35 mm DIN mounting rail according to EN 60715.
KFD2-STV5-Ex1-1, KFD2-STV5-Ex2-1
This isolated barrier is used for intrinsic safety applications.
The device supplies 2-wire and 3-wire SMART transmitters, and can also be used
with 2-wire SMART current sources.
It transfers the analog input signal to the safe area as an isolated current value.
Digital signals may be superimposed on the input signal in the hazardous or non-
hazardous area and are transferred bi-directionally.
If the HART communication resistance in the loop is too low, the internal
resistance can be used.
Test sockets for the connection of HART communicators are integrated into the
terminals of the device.
The device is mounted on a 35 mm DIN mounting rail according to EN 60715.

Functional Safety HiD2022*, KFD2-STC5-(Ex)*, KFD2-STV5-(Ex)*
Product Description
2017-09
11
KFD2-STV5-Ex1.2O-1, KFD2-STV5-Ex1.2O-2
This isolated barrier is used for intrinsic safety applications.
The device supplies 2-wire and 3-wire SMART transmitters, and can also be used
with 2-wire SMART current sources.
It transfers the analog input signal to the safe area as two isolated output signals.
Digital signals may be superimposed on the input signal in the hazardous or non-
hazardous area and are transferred bi-directionally.
If the HART communication resistance in the loop is too low, the internal
resistance can be used.
Test sockets for the connection of HART communicators are integrated into the
terminals of the device.
The device is mounted on a 35 mm DIN mounting rail according to EN 60715.
KFD2-STV5-Ex2-1, KFD2-STV5-Ex2-2
This isolated barrier is used for intrinsic safety applications.
The device supplies 2-wire and 3-wire SMART transmitters, and can also be used
with 2-wire SMART current sources.
It transfers the analog input signal to the safe area as an isolated current value.
Digital signals may be superimposed on the input signal in the hazardous or non-
hazardous area and are transferred bi-directionally.
If the HART communication resistance in the loop is too low, the internal
resistance can be used.
Test sockets for the connection of HART communicators are integrated into the
terminals of the device.
The device is mounted on a 35 mm DIN mounting rail according to EN 60715.

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Functional Safety HiD2022*, KFD2-STC5-(Ex)*, KFD2-STV5-(Ex)*
Product Description
Interfaces
The device has the following interfaces.
• Safety relevant interfaces:
• Non-safety relevant interfaces: none
The HART communication is not relevant for functional safety.
2.2 Marking
2.3 Standards and Directives for Functional Safety
Device specific standards and directives
System-specific standards and directives
Input I, output I KFD2-STC5-1, KFD2-STC5-Ex1, KFD2-STC5-Ex1.H,
KFD2-STV5-1-1, KFD2-STV5-Ex1-1,
KFD2-STV5-Ex1-2
Input I, output I, output II KFD2-STC5-1.2O, KFD2-STC5-Ex1.2O,
KFD2-STC5-Ex1.2O.H, KFD2-STV5-Ex1.2O-1,
KFD2-STV5-Ex1.2O-2
Input I, input II, output I,
output II
HiD2022, HiD2022SK, KFD2-STC5-2,
KFD2-STC5-Ex2, KFD2-STV5-2-1, KFD2-STV5-Ex2-1,
KFD2-STV5-Ex2-2
Note!
For corresponding connections see datasheet.
Pepperl+Fuchs GmbH
Lilienthalstraße 200, 68307 Mannheim, Germany
Internet: www.pepperl-fuchs.com
HiD2022, HiD2022SK,
KFD2-STC5-1, KFD2-STC5-2, KFD2-STC5-Ex1, KFD2-STC5-Ex1.H,
KFD2-STC5-Ex2,
KFD2-STV5-1-1, KFD2-STV5-2-1, KFD2-STV5-Ex1-1, KFD2-STV5-
Ex1-2, KFD2-STV5-Ex2-1, KFD2-STV5-Ex2-2
Up to SIL 2
KFD2-STC5-1.2O, KFD2-STC5-Ex1.2O, KFD2-STC5-Ex1.2O.H,
KFD2-STV5-Ex1.2O-1, KFD2-STV5-Ex1.2O-2
Up to SIL 3
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 2003:
Functional safety –Safety instrumented systems for the
process industry sector (user)

Functional Safety HiD2022*, KFD2-STC5-(Ex)*, KFD2-STV5-(Ex)*
Planning
2017-09
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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 T
1
value (proof test interval that has a direct impact on the PFD
avg
value)
•theSFFvalue(Safe Failure Fraction)
•theHFTarchitecture(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
•theSFFvalue(Safe Failure Fraction)
•theHFTarchitecture(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.
Functional Safety HiD2022*, KFD2-STC5-(Ex)*, KFD2-STV5-(Ex)*

2017-09
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Functional Safety HiD2022*, KFD2-STC5-(Ex)*, KFD2-STV5-(Ex)*
Planning
3.2 Assumptions
The following assumptions have been made during the FMEDA:
• 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 safety-related device is considered to be of type Adevice with a hardware
fault tolerance of 0.
• The device will be used under average industrial ambient conditions, which
are comparable with the classification "stationary mounted" in
MIL-HDBK-217F. Alternatively, the following ambient conditions are assumed:
• 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.
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 HART function is only used for configuration, calibration and diagnostics,
not during operation.
• The application program in the programmable logic controller (PLC) is
configured to detect underrange and overrange failures.
• Since the two outputs of the device use common components, these outputs
must not be used in the same safety function.
SIL 2 Application
• 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 PFD
avg
value
of the SIF (Safety Instrumented Function) should be smaller than 10
-2
, hence
the maximum allowable PFD
avg
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.
• Since the safety loop has a hardware fault tolerance of 0and it is a type A
device, the SFF must be > 60 % according to table 2 of IEC/EN 61508-2 for a
SIL 2 (sub) system.

Functional Safety HiD2022*, KFD2-STC5-(Ex)*, KFD2-STV5-(Ex)*
Planning
2017-09
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SIL 3 Application
SIL 3 can be reached if the two outputs of the device are connected to the same
control interface and evaluated if the deviation remains below 2 %.
• The device shall claim less than 10 % of the total failure rate for a SIL 3 safety
loop.
• For a SIL 3 application operating in low demand mode the total PFD
avg
value
of the SIF (Safety Instrumented Function) should be smaller than 10
-3
, hence
the maximum allowable PFD
avg
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.
• Since the safety loop has a hardware fault tolerance of 0and 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.
3.3 Safety Function and Safe State
Safety Function
The device transfers analog signals from the input to the output with a deviation of
less than 2 %.
Safe State
Ensure that the emergency shutdown (ESD) reacts adequately when the outputs
are
• <4mAor>20mA,
•<1Vor>5V,
• <2Vor>10V.
Failures that introduce the safe state show that either the device or the attached
periphery is defective as a live zero signal is expected. Due to this, these failures
are counted as dangerous detected failures for the system.
Reaction Time
The reaction time for all safety functions is < 100 ms.
Device Input signals Output signals
KFD2-STC5-1, KFD2-STC5-Ex1, KFD2-STC5-Ex1.H
KFD2-STC5-1.2O, KFD2-STC5-Ex1.2O, KFD2-STC5-Ex1.2O.H,
HiD2022, HiD2022SK, KFD2-STC5-2, KFD2-STC5-Ex2
0/4 mA to 20 mA 0/4 mA to 20 mA
KFD2-STV5-1-1, KFD2-STV5-Ex1-1, KFD2-STV5-Ex1.2O-1,
KFD2-STV5-2-1, KFD2-STV5-Ex2-1
0/4 mA to 20 mA 0/1 V to 5 V
KFD2-STV5-Ex1-2, KFD2-STV5-Ex1.2O-2, KFD2-STV5-Ex2-2 0/4 mA to 20 mA 0/2 V to 10 V
Table 3.1

2017-09
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Functional Safety HiD2022*, KFD2-STC5-(Ex)*, KFD2-STV5-(Ex)*
Planning
Functional Safety Connection Configuration for KFD2-***-(Ex)1.2O*
Devices
Figure 3.1 SIL 2 application
Figure 3.2 SIL 3 application
KFD2-***-(Ex)1.2O*
DCS 1/
ESD system 1
DCS 2/
ESD system 2
Output 1 Input A
Output 2 Input B
SIL 2 transmitter
KFD2-***-(Ex)1.2O*
ESD system
Output 1 Input A
Output 2 Input B
Compare input A + B
1oo2
deviation max. 2 %
SIL 3 transmitter
Note!
See corresponding datasheets for further information.

Functional Safety HiD2022*, KFD2-STC5-(Ex)*, KFD2-STV5-(Ex)*
Planning
2017-09
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3.4 Characteristic Safety Values
KFD2-STC5-1, KFD2-STC5-Ex1, KFD2-STC5-Ex1.H, KFD2-STV5-1-1,
KFD2-STV5-Ex1-1, KFD2-STV5-Ex1-2
HiD2022, HiD2022SK, KFD2-STC5-2, KFD2-STC5-Ex2, KFD2-STV5-2-1,
KFD2-STV5-Ex2-1, KFD2-STV5-Ex2-2
Parameters acc. to IEC 61508 Characteristic values
Assessment type and documentation FMEDA report
Device type A
Operating mode Low Demand Mode or High Demand Mode
Safety function Transfer of analog signals
HFT 0
SIL (SC) 2

s1
1
"No effect failures" are not influencing the safety function and are therefore not included in SFF and in the
failure rates of the safety function.
0 FIT

dd 2
2
"Fail high" and "Fail low" failures are considered as dangerous detected failures 
dd
.
169 FIT

du
67 FIT

not part
70 FIT

total (safety function)
236 FIT

total
653 FIT
SFF 72 %
PTC 100 %
MTBF
3
3
acc. to SN29500. This value includes failures which are not part of the safety function/MTTR = 24 h. The
value is valid for one safety loop only.
175 years
PFH 6.72 x 10
-8
1/h
PFD
avg
for T
1
= 1 year 2.94 x 10
-4
PFD
avg
for T
1
= 2 years 5.88 x 10
-4
PFD
avg
for T
1
= 5 years 1.47 x 10
-3
Reaction time
4
4
Time between fault detection and fault reaction
< 100 ms
Table 3.2

2017-09
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Functional Safety HiD2022*, KFD2-STC5-(Ex)*, KFD2-STV5-(Ex)*
Planning
KFD2-STC5-1.2O, KFD2-STC5-Ex1.2O, KFD2-STC5-Ex1.2O.H,
KFD2-STV5-Ex1.2O-1, KFD2-STV5-Ex1.2O-2
The characteristic safety values like PFD, SFF, HFT and T
1
are taken from the
SIL report/FMEDA report. Observe that PFD and T
1
are related to each other.
The function of the devices has to be checked within the proof test interval (T
1
).
Parameters acc. to IEC 61508 Characteristic values
Assessment type and
documentation
FMEDA report
Device type A
Operating mode Low Demand Mode or High Demand Mode
Safety function Transfer of analog signals
HFT 0
SIL (SC) 2 3
Input and output function 1 output used in safety function 2 outputs used in safety function

s1
1
"No effect failures" are not influencing the safety function and are therefore not included in SFF and in the
failure rates of the safety function.
0 FIT 0 FIT

dd 2
2
"Fail high" and "Fail low" failures are considered as dangerous detected failures 
dd
.
177 FIT 328 FIT

du
3
3
The safety characteristic values were calculated considering a common cause factor of 5 % for the safety
relevant output part.
For the application with 2 outputs in the safety function, the ESD system needs to detect if the outputs differ
by more than 2 %.
57 FIT 9.3 FIT

not part
72 FIT 114 FIT

total (safety function)
234 FIT 337 FIT

total
660 FIT 954 FIT
SFF 80 % 97.3 %
PTC 100 % 100 %
MTBF
4
4
acc. to SN29500. This value includes failures which are not part of the safety function/MTTR = 24 h. The
value is valid for one safety loop only.
173 years 119 years
PFH
3
5.67 x 10
-8
1/h 9.27 x 10
-9
1/h
PFD
avg
for T
1
= 1 year 2.48 x 10
-4
4.06 x 10
-5
PFD
avg
for T
1
= 2 years 4.97 x 10
-4
8.12 x 10
-5
PFD
avg
for T
1
= 5 years 1.24 x 10
-3
2.03 x 10
-4
Reaction time
5
5
Time between fault detection and fault reaction
< 100 ms
Table 3.3

Functional Safety HiD2022*, KFD2-STC5-(Ex)*, KFD2-STV5-(Ex)*
Planning
2017-09
19
3.5 Useful Life Time
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 period of about 8 to 12 years.
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.

2017-09
20
Functional Safety HiD2022*, KFD2-STC5-(Ex)*, KFD2-STV5-(Ex)*
Mounting and Installation
4 Mounting and Installation
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.
Functional Safety HiD2022**, KFD2-STC5-(Ex)*, KFD2-STV5-(Ex)*