Pepperl+Fuchs HiD2022 Series User manual

ISO9001
2
3
Functional Safety
SMART Transmitter Power
Supply
HiD2022*, KFD2-STC5-(Ex)*,
KFD2-STV5-(Ex)*
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 HiD2022*, KFD2-STC5-(Ex)*, KFD2-STV5-(Ex)*
Contents
2021-04
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 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
2.3 Marking . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
2.4 Standards and Directives for Functional Safety . . . . . . . . . . . . . . . . . . 11
3 Planning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
3.1 Assumptions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
3.2 Safety Function and Safe State . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
3.3 Characteristic Safety Values . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
3.4 Useful Lifetime . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
4 Mounting and Installation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
4.1 Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
5 Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
5.1 Proof Test Procedure. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
6 Maintenance and Repair . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
7 List of Abbreviations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25

Functional Safety HiD2022*, KFD2-STC5-(Ex)*, KFD2-STV5-(Ex)*
Contents
4
2021-04

Functional Safety HiD2022*, KFD2-STC5-(Ex)*, KFD2-STV5-(Ex)*
Introduction
2021-04
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 HiD2022*, KFD2-STC5-(Ex)*, KFD2-STV5-(Ex)*
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.

Functional Safety HiD2022*, KFD2-STC5-(Ex)*, KFD2-STV5-(Ex)*
Introduction
2021-04
7
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 HiD2022*, KFD2-STC5-(Ex)*, KFD2-STV5-(Ex)*
Product Description
2 Product Description
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.
The device transfers the analog input signal to the non-hazardous 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.
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.
The device transfers the analog input signal to the non-hazardous 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.
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.

Functional Safety HiD2022*, KFD2-STC5-(Ex)*, KFD2-STV5-(Ex)*
Product Description
2021-04
9
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.
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.
The device transfers the analog input signal to the non-hazardous 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.
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.

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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.
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.
The device transfers the analog input signal to the non-hazardous 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.
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.
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.
The device transfers the analog input signal to the non-hazardous 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.

Functional Safety HiD2022*, KFD2-STC5-(Ex)*, KFD2-STV5-(Ex)*
Product Description
2021-04
11
2.2 Interfaces
The device has the following interfaces.
•Safety relevant interfaces:
•Non-safety relevant interfaces: none
The HART communication is not relevant for functional safety.
2.3 Marking
2.4 Standards and Directives for Functional Safety
Device specific standards and directives
System-specific standards and directives
Note
See corresponding datasheets for further information.
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 Group
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)

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Functional Safety HiD2022*, KFD2-STC5-(Ex)*, KFD2-STV5-(Ex)*
Planning
3 Planning
3.1 Assumptions
The following assumptions have been made during the FMEDA:
•Failure rate based on the Siemens standard SN 29500.
•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 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.
•If you are using the HART function, observe that the HART signal superimposes
an analog signal on the signal line. This is negligible for slow acquisition system
(typically < 25 acquisition/s). If in doubt, use HART filters at the analog input
of the receiving device.
•The application program in the programmable logic controller (PLC) is configured
to detect underrange and overrange failures.
•Both channels of the 2-channel device can be used in the same safety function.
Observe that both devices use common components and that a simultaneous failure
is possible with a common cause factor of 15 %.
SIL 2 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.
•Since the safety loop has a hardware fault tolerance of 0 and 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.
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 %.
•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.
•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.

Functional Safety HiD2022*, KFD2-STC5-(Ex)*, KFD2-STV5-(Ex)*
Planning
2021-04
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3.2 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 %.
Values outside the range of the output signals indicate a fault in the periphery or within
the device and a dangerous detected failure. See table below.
Safe State
The safe state depends on the limit value in the respective application.
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
0/3.6 mA to 21 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
0/0.9 V to 5.25 V 0/1 V to 5 V
KFD2-STV5-Ex1-2, KFD2-STV5-Ex1.2O-2,
KFD2-STV5-Ex2-2 0/1.8 V to 10.5 V 0/2 V to 10 V
Table 3.1

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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
This figure refers to the left column of table 3.3.
Figure 3.2 SIL 3 application
This figure refers to the right column of table 3.3.
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 and 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
2021-04
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3.3 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 Full assessment
Device type A
Operating mode Low Demand Mode or High Demand Mode
Safety function Transfer of analog signals
HFT 0
SIL 2
SC 3
s0 FIT
low1
1"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 2
2acc. 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
PFDavg for T1 = 1 year 2.94 x 10-4
PFDavg for T1 = 2 years 5.88 x 10-4
PFDavg for T1 = 5 years 1.47 x 10-3
Reaction time 3
3Time between fault detection and fault reaction
< 100 ms
Table 3.2

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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 T1 are taken from the
SIL report/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 acc. to IEC 61508 Characteristic values
Assessment type and
documentation Full assessment
Device type A
Operating mode Low Demand Mode or High Demand Mode
Safety function Transfer of analog signals
Input and output function 1 output used in safety function 2 outputs used in safety function
HFT 0
SIL 2 3
SC 3
s0 FIT 0 FIT
low1
1"Fail low" failures are considered as dangerous detected failures dd.
177 FIT 328 FIT
du 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 2
2acc. 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
3The 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 %.
5.67 x 10-8 1/h 9.27 x 10-9 1/h
PFDavg for T1 = 1 year 32.48 x 10-4 4.06 x 10-5
PFDavg for T1 = 2 years 34.97 x 10-4 8.12 x 10-5
PFDavg for T1 = 5 years 31.24 x 10-3 2.03 x 10-4
Reaction time 4
4Time between fault detection and fault reaction
< 100 ms
Table 3.3

Functional Safety HiD2022*, KFD2-STC5-(Ex)*, KFD2-STV5-(Ex)*
Planning
2021-04
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3.4 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.
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.
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.

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

Functional Safety HiD2022*, KFD2-STC5-(Ex)*, KFD2-STV5-(Ex)*
Operation
2021-04
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5 Operation
Operating the device
1. Observe the safety instruction 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 24 hours. Take measures to maintain the safety
function while the device is being repaired.
5.1 Proof Test Procedure
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 3.3.
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 with an accuracy better than 0.1 %
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.
•Power supply set to nominal voltage of 24 V DC
•Process calibrator with current source and current sink function with an accuracy better
than 20 µA
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.

2021-04
20
Functional Safety HiD2022*, KFD2-STC5-(Ex)*, KFD2-STV5-(Ex)*
Operation
Proof Test Procedure
1. Put out of service the entire safety loop. Protect the application by means of other measures.
2. Prepare a test set-up, see figures below.
3. Test the devices. Verify the current values as given in table below.
4. After the test, reset the device to the original settings.
Proof Test for 1- and 2-Channel K-System Devices
Figure 5.1 Proof test set-up for KFD2-STC5-(Ex)*-*(.H)
Usage in Zone 0, 1, 2/Div. 1, 2 only for KFD2-STC5-Ex1, KFD2-STC5-Ex1.H, and
KFD2-STC5-Ex2
The KFD2-STC5-1, KFD2-STC5-Ex1, and KFD2-STC5-Ex1.H devices have no second
channel.
Input value (mA) Output value
Current source/current
sink (mA) for
KFD2-STC5-(Ex)*-*(.H)
Voltage source (V) for
KFD2-STV5-(Ex)*-1
Voltage source (V) for
KFD2-STV5-(Ex)*-2
20.0 20.0 ± 0.4 5.0 ± 0.1 10.0 ± 0.2
12.0 12.0 ± 0.4 3.0 ± 0.1 6.0 ± 0.2
4.0 4.0 ± 0.4 1.0 ± 0.1 2.0 ± 0.2
23.0 23.0 ± 0.4 5.75 ± 0.1 11.5 ± 0.2
0 < 0.2 < 0.1 < 0.1
Table 5.1
KFD2-STC5-Ex2
Zone 0, 1, 2
Div. 1, 2
Zone 2
Div. 2
I supply
1
3
2
4
6
5
7-
8+
9
250 Ω
10-
11+
12
250 Ω
14+
15-
Signal calibration
4 mA ... 20 mA
24 V DC
Power
supply
Multimeter
(mA)
Multimeter
(mA)