turck IMX12-TI02-1TCURTDR-1I-PR/24VDC User guide

Your Global Automation Partner
Safety Manual
IM(X)12-TI02-1TCURTDR-1I
Temperature Measuring
Amplifier

2 Hans Turck GmbH & Co. KG | T [phone] | F [phone] | [e-mail] | www.turck.com
Contents

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1 About this document 5
2 Scope 5
3 Safety Integrity Level 6
4 Product description 6
4.1 Safety function 6
4.2 Safety accuracy 6
4.3 Safe state 7
4.4 Alarm state 7
5 Safety planning 8
5.1 Architectural specicatons 8
5.2 Assumptions 8
5.3 FMEDA results 8
5.3.1 The following safety characteristic are the results of the FMEDA. 9
5.3.2 Probability of dangerous failure per hour (High Demand Mode) 9
5.3.3 Average probability of dangerous failure on demand (Low Demand Mode) 9
6 Operating instructions 10
6.1 General 10
6.2 Before operation 11
6.2.1 Parameterization 13
6.3 Operation 16
6.4 After operation 16
7 Connection and wiring diagrams 17
7.1 Output transistor 17
7.1.1 Wiring diagrams 17
8 Terms and abbreviations 18
9 Appendix: failures 18
9.1 Resistance 18
9.2 TC 19
9.3 RTD 19
10 Proof tests 20
11 Certicate 21
12 Document history 21
Contents

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5
V01.00 | 2022/03
1 About this document
This safety manual contains all information that is required to operate the device in functional
safety systems. Read this manual carefully before using the device.
This document addresses only functional safety according to IEC 61508. Other aspects, such as
intrinsic safety, are not considered.
All instructions must be followed in order to assure functional safety.
Always make sure that this is the latest version of the safety manual at www.turck.com. The
English version is considered the definitive document. Care was taken in the production of the
translations of this document. If there is any uncertainty in its interpretation. Always refer to the
English version of the safety manual or contact Turck directly.
2 Scope
This safety manual is valid for the following devices.
ID Product name Number of
Channels
Clamps Power-Bridge Intrinsic Safety
7580500 IMX12-TI02-1TCURTDR-1I-PR/24VDC 1 Screw Yes Yes
7580501 IMX12-TI02-1TCURTDR-1I-0/24VDC 1 Screw No Yes
7580502 IMX12-TI02-1TCURTDR-1I-PR/24VDC/CC 1 Spring type terminal Yes Yes
7580503 IMX12-TI02-1TCURTDR-1I-0/24VDC/CC 1 Spring type terminal No Yes
7580521 IM12-TI02-1TCURTDR-1I-PR/24VDC 1 Screw Yes No
7580522 IM12-TI02-1TCURTDR-1I-0/24VDC 1 Screw No No
7580523 IM12-TI02-1TCURTDR-1I-PR/24VDC/CC 1 Spring type terminal Yes No
7580524 IM12-TI02-1TCURTDR-1I-0/24VDC/CC 1 Spring type terminal No No
The following chapters cover the devices
■IMX12-TI02-1TCURTDR-1I
■IM12-TI02-1TCURTDR-1I

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Safety Integrity Level
3 Safety Integrity Level
The devices are rated to a SIL of:
SIL 2
4 Product description
Universal temperature measuring amplifier
Input
■TC thermocouples according to IEC 60584, DIN 43710, GOST R 8.585-2001
■Low voltages (-150…+150 mV)
■RTDs according to IEC 60751, DIN 43760, GOST 6651-94 (2-, 3-, 4-wire)
■Resistors (0…5000 Ω)
■(2-, 3-, 4-wire) Cold junction compensation internal or external adjustable via DIP switch on
the device
Output
■Current output source/sink 0/4…20 mA
■Collective fault signal output (MOSFET), potential-free
4.1 Safety function
The measured values at input [E1] are transmitted to the output [A1A] according to the param-
eterization within 10 s (local process safety time) observing the permissible safety accuracy.
The safety function is executed 5 s after power-on.
The LED State is not part of the safety function.
The common alarm output is not part of the safety function.
The power-bridge is not part of the safety function.
4.2 Safety accuracy
The safety accuracy Δtotal depends on the variant and its configuration.
In order to evaluate the safety accuracy for an inidividual configuration the following informa-
tion is required:
Accuracy Value
ΔTC See chapter “9.2 TC“ on page 19
ΔRTD See chapter “9.3 RTD“ on page 19
ΔOhm See chapter “9.1 Resistance“ on page 18
Δ[A1A] = 100 µA/(16 mA/(|”measuring range start”- “measuring range end”|))
Assignment [E] to [A] Δtotal
[E1][Ax] Δ[E1] + Δ[A1A]

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Δ[E1] depends on the parameter“Measuring mode”and“CJC Mode”if applicable:
Measuring mode CJC mode Δ[E1] Unit
TC Internal ΔTC + 2 °C
TC External ΔTC + ΔRTD °C
RTD - ΔRTD °C
Low voltage - 0.175 mV
Resistor - ΔOhm Ω
4.3 Safe state
The safe state is defined as the output reaching the user defined threshold value.
If the unit changes to the safe state due to an internal error, it must be replaced within 24 h.
Due to errors in the unit, the measurement error can increase up to the error tolerance. If the
error exceeds the error tolerance, the outputs of the unit go into the safe state.
4.4 Alarm state
Internal diagnostics are provided in order to detect random hardware failures that result in a
failure of the function. If a failure is detected the device goes into the alarm state. The time be-
tween the occurance of the failure and the time to achieve the alarm state is less than 10s. The
device remains in alarm state as long as the failure persists, at least for 2s.
The alarm state is defined as the output is less than 3.6mA or greater than 21mA.
According to table 2 and table 3 from 7.4.4.2.2 EN 61508-1:2010, depending on the operating
mode (Typ A or Typ B) and taking into account the hardware fault tolerance of HFT=0, the fol-
lowing SFF values are applied:
■For type A devices, the SFF must be greater than 60%.
■For type B devices, the SFF must be greater than 90%.
Table 2 from 7.4.4.2.2 EN 61508-2 (Typ A)
Part of safe Failures of
an element
HFT=0 HFT=1 HFT=2
< 60 % SIL 1 SIL 2 SIL 3
60 % - < 90% SIL 2 SIL 3 SIL 4
90 % - < 99% SIL 3 SIL 4 SIL 4
≥ 99 % SIL 3 SIL 4 SIL 4
Table 3 from 7.4.4.2.2 EN 61508-2 (Typ B)
Part of safe Failures of
an element
HFT=0 HFT=1 HFT=2
< 60 % not allowed SIL 1 SIL 2
60 % - < 90% SIL 1 SIL 2 SIL 3
90 % - < 99% SIL 2 SIL 3 SIL 4
≥ 99 % SIL 3 SIL 4 SIL 4

8 Hans Turck GmbH & Co. KG | T [phone] | F [phone] | [email protected] | www.turck.com
Safety planning
5 Safety planning
This chapter provides information for planning a safety-related loop.
The device is not specified for a certain application. Make sure that the data provided in this
chapter is valid for your target application.
Special application-specific factors may cause the premature wear of the device and must be
taken into consideration when planning systems; take special measures to compensate for a
lack of experience based values, e.g. through implementation of shorter test intervals.
The suitability for specific applications must be assessed by considering the particular overall
safety-related system with regard to the requirements of IEC 61508.
Safety-planning must only be carried out by trained and qualified personnel.
If there is any doubt contact Turck directly.
5.1 Architectural specicaton
Type B
HFT 0
Experience has shown that the useful lifetime often lies within a range of 8 to 12 years. It can
be significantly less if elements are operated near their specification limits. However, it can
be extended by appropriate measures. For example, heavy temperature fluctuations could
potentially decrease the useful lifetime, as constant temperature below 40 °C could potentially
increase the useful lifetime.
Two devices must not be used for the same safety-function to increase the hardware fault toler-
ance to achieve a higher SIL. A 1oo2 architecture does not achieve a SIL3.
5.2 Assumptions
■Failure rates are constant for 10 years, wear out mechanisms are not included.
■Propagation of failures are not relevant.
■External power supply failure rates are not included.
■All components that are not part of the safety function and cannot influence the safety
function (feedback immune) are excluded.
■The activations of line-monitoring can improve the results.
5.3 FMEDA results
According to table 2 and table 3 from 7.4.4.2.2 EN 61508-1:2010, depending on the operating
mode (Typ A or Typ B) and taking into account the hardware fault tolerance of HFT=0, the fol-
lowing SFF values are applied:
■For type A devices, the SFF must be greater than 60 %.
■For type B devices, the SFF must be greater than 90 %.
Table 2 from 7.4.4.2.2 EN 61508-2 (Typ A)
Part of safe failures of an element HFT=0 HFT=1 HFT=2
< 60 % SIL 1 SIL 2 SIL 3
60 % … < 90 % SIL 2 SIL 3 SIL 4
90 % … < 99 % SIL 3 SIL 4 SIL 4
≥ 99 % SIL 3 SIL 4 SIL 4

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Table 3 from 7.4.4.2.2 EN 61508-2 (Typ B)
Part of safe failures of an element HFT=0 HFT=1 HFT=2
< 60 % not allowed SIL 1 SIL 2
60 % … < 90 % SIL 1 SIL 2 SIL 3
90 % … < 99 % SIL 2 SIL 3 SIL 4
≥ 99 % SIL 3 SIL 4 SIL 4
5.3.1 The following safety characteristic are the results of the FMEDA.
According to the configuration (inversion-mode, line-monitoring) the results of the FMEDA
vary. In this case the worst-case configuration is regarded.
λSD λSU λDD λDU No
eect
SFF DC
IMX12-TI02-1TCURTDR-1I
IM12-TI02-1TCURTDR-1I
0 FIT 154.74 FIT 316.78 FIT 44.47 FIT 490 FIT 91.38 % 97.27 %
For analog outputs a λDD failure is defined as a failure that is dangerous but is detected by inter-
nal diagnostics and causes the output the output signal to go to the maximum output current
(> 21mA) or minimum output current (< 3.6mA).
The stated Safe Failure Fraction (SFF) is for reference only. The complete subsystem will need to
be evaluated to determine the overall SFF.
The failure rates used in this analysis are the basic failure rates from the Siemens standard
SN29500 based on the average ambient temperature of components of 40 °C.
„No effect” is a failure mode of a component that plays part in implementing the safety func-
tion but is neither a safe nor a dangerous failure. According to IEC 62061, it would be possible
to classify the„No effect” failures as„Safe Undetected”failures. Not doing so represents the
worst-case.
5.3.2 Probability of dangerous failure per hour (High Demand Mode)
The sum of the diagnostic test interval and the time to achieve the specified safe/alarm state is
less than 10s. The ratio of the diagnostic test rate to the demand rate shall equal or exeed 100.
PFH
IMX12-TI02-1TCURTDR-1I
IM12-TI02-1TCURTDR-1I
44,47E-09 1/h
5.3.3 Average probability of dangerous failure on demand (Low Demand Mode)
With the FMEDA results and the values specified in the following table the average frequency of
dangerous failure can be calculated exemplarily:
T1 8760 h
MTTR 24 h
PFDavg
IMX12-TI02-1TCURTDR-1I
IM12-TI02-1TCURTDR-1I
2.03E-04

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Operating instructions
6 Operating instructions
6.1 General
➤ The device must be registered online: http://www.turck.com/SIL or with the supplied SIL
registration card. This must be filled in with all required information upon receipt and sent to
Turck.
➤ The device must only be carried out, fitted, installed, operated, commissioned and main-
tained by trained and qualified personnel.
➤ The device is not specified for a certain application. Make sure that application-specific as-
pects are considered.
➤ Data from other documents, e.g. data sheets, is not valid for functional safety operation. De-
vices must be used in cabinets in an typical industrial field environment only. The following
restrictions describe the operation and storage conditions:
➤ Ensure that the environment complies with the following ratings
Minimum ambient temperature -25 °C
Maximum ambient temperature 70 °C
Minimum storage temperature -40 °C
Maximum storage temperature 80 °C
Maximum air humidity 95 %
Minimum air pressure 80 kPa
Maximum air pressure 110 kPa
➤ The average temperature over a long period of time directly on the exterior sidewall of the
housing must be maximum 40 °C.
➤ The temperature on the exterior sidewall of the housing can deviate considerably from the
temperature in the control cabinet.
➤ The temperature on the exterior sidewall of the housing must be observed in a steady
state.
➤ In case the temperature on the exterior sidewall of the housing is higher, the failure rates
from “5.3 FMEDA results“ on page 8 must be adjusted:
➤ For a higher average temperature of 60 °C on the exterior sidewall of the housing, the fail-
ure rates are multiplied by an experience factor of 2.5.
➤ Ensure that sufficient heat dissipation is provided.
➤ Protect the device from radiated heat and severe temperature fluctuations.
➤ Protect the device from dust, dirt, moisture, shock, vibration, chemical stress, increased radia-
tion and other environmental influences.
➤ Ensure a degree of protection of at least IP20 according to IEC 60529 at the mounting
location.
➤ Ensure that the electromagnetic stress does not exceed the requirements of IEC 61326-3.1.
➤ If there is a visible error, e.g. defective housing, the device must not be used.
➤ During operation of the device, surface temperatures may occur that could lead to burns if
touched.
➤ The device must not be repaired. If problems occur with regard to functional safety, Turck
must be notified immediately and the device must be returned immediately to:
Hans Turck GmbH & Co. KG
Witzlebenstraße 7
45472 Mülheim
Germany

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6.2 Before operation
➤ Fasten the device to a din rail according EN 60715 (TH35) as follows:
Fig. 1: Fasten the device
➤ Connect cables according to the wiring diagrams in “7 Connection and wiring diagrams“ on
page 17
➤ Use cables with the following terminal cross section
ūrigid: 0.2 mm2to 2.5 mm2or
ūflexible: 0.2 mm2to 2.5 mm2
➤ When wiring with stranded wires: Fix the wiring ends with ferrules.
Connection via screw terminals:
➤ Insert the stripped cable ends (7 mm) in the guides of the cable glands.
➤ Fasten the screws with a screwdriver (max. tightening torque 0.5 Nm) to affix the cable ends.
Fig. 2: Connection with screw terminals
7 mm
0.5 Nm
(4.43 LBS-inc)
0.2…2.5 mm2
(24…13 AWG)
1
2

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Operating instructions
Connection with spring-type terminals
➤ Push the opening lever with a suitable screwdriver.
➤ Insert the stripped cable ends (7 mm) in the guides of the spring-type terminals.
➤ Pull the screwdriver to fix the cable ends.
Fig. 3: Connection with spring-type terminals
➤ Make sure that only suitable equipment, e.g. sensors, are connected to the device (see “7
Connection and wiring diagrams“ on page 17).
➤ Make sure that a suitable power supply with the following characteristic is used:
Minimum voltage 10 VDC
Maximum voltage 30 VDC
Minimum power 4 W
7 mm
0.2…2.5 mm2
(24…13 AWG)
1
2

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6.2.1 Parameterization
The device is configured via rotary coding switches and DIP switches.
Set basic parameters via DIP switches
DIP switch Parameter Left Right
S1 Sensor type TC RTD
S2 TC group A B
S3 CJC Intern Ext. RTD
S4 RTD-group A B
S5 RTD 2wire/(3w/4w) 2w 3w/4w
S6 RTD 3wire/4wire 3w 4w
S7 Error current > 21 mA < 1 mA
S8 Temperature unit °C °F
S7 error current: output current by wire break in the input ciruit.
apply config
(push 3sec)
LED GN - power ON / Betriebsbereitschaft
LED RD - Error / Fehler
S1
S8
IMX12-TI02-1TCURTDR-1I
UNIVERSAL Temperature-Measuring Amplifier / UNIVERSAL Temperatur-Messumformer
pin
3
4
5
6
7
8
9
10
15
16
NC
description
RTD- (4, 3wire)
RTDsense- (4, 3, 2wire)
RTDsense+ (4, 3, 2wire)
RTD+ (4-wire)
TC+
TC-
Iout source+/sink-
Iout source-/sink+
Ub+
Ub-
1, 2, 11, 12, 13, 14
pin description
S1
S2
S3
S4
S5
S6
S7
S8
sensor type
TC-group
CJC
RTD-group
RTD 2-wire / (3w/4w)
RTD 3-wire / 4-wire
error current
temperature unit
TC
A
intern
A
2w
3w
>21mA
°C
RTD
B
ext. RTD
B
3w/4w
4w
<1mA
°F
parameter value
TC-sensor RTD-sensor
UR2
(LR1 *10+LR2)* LR3
LR2
(UR1 *10+UR2)* UR3
UR1LR1
lower range value= upper range value=
0
1
23
4
5
678 9
0
1
23
4
5
678 9
0
1
23
4
5
678 9
0
1
23
4
5
678 9
0
1
23
4
5
678 9
0
1
23
4
5
678 9
UR3 LR3
source
100
1
10
-1
-1
110100
sink
100
1
10
-1
-1
110 100
live zero
dead zero
0
1
2
3
4
5
6
7
8
9
TypeA (1)
TypeB (1)
TypeC (1)
TypeE (1)
TypeJ (1)
TypeK (1)
TypeN (1)
TypeR (1)
TypeS (1)
TypeT (1)
TypeL (2)
TypeA-1(3)
TypeA-2 (3)
TypeA-3 (3)
TypeL (3)
TypeM (3)
mV
Pt50 (1)
Pt100 (1)
Pt500 (1)
Pt1000 (1)
Ni50 (2)
Ni100 (2)
Ni500 (2)
Ni1000 (2)
Pt50 (3)
Pt100 (3)
Pt500 (3)
Pt1000 (3)
Cu50 (3)
Cu53 (3)
Cu100 (3)
Cu500 (3)
CuZn100(3)
Ohm
Type TC-A RTD-A
1
2
3
DIN EN 60584
DIN 43710
GOST 5.585-2001
DIN EN 60751
DIN 43760
GOST 6651-94
TC-B RTD-B
RTD/Ohm 2-wire LC start/break: 3xpush "apply config"
end: automaticaly on success

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Operating instructions
Set measurement mode RTD/Ohm/TC/mV
➤ Set TC type or mV (extra-low voltage) via rotary coding switch “TC-sensor”resp. set RTD type
or Ohm (resistance) via rotary coding switch“RTD-sensor”.
TC-sensor/
RTD-sensor
TC-Group A TC-Group B RTD-Group A RTD-Group B
0 Typ A (4) Typ I (5) PT50 (1) PT50 (3)
1 Typ B (4) PT100 (1) PT100 (3)
2 Typ C (4) Typ A-1 (6) PT500 (1) PT500 (3)
3 Typ E (4) Typ A-2 (6) PT1000 (1) PT1000 (3)
4 Typ J (4) Typ A-3 (6) Ni50 (2) Cu50 (3)
5 Typ K (4) Typ L (6) Ni100 (2) Cu53 (3)
6 Typ N (4) Typ M (6) Ni500 (2) Cu100 (3)
7 Typ R (4) Ni1000 (2) Cu500 (3)
8 Typ S (4) CuZn100 (3)
9Typ T (4) mV Ohm
Nr. Norm
(1) DIN EN 60751, GOST 6651-94 -09 (Pt: W100 = 1.385)
(2) DIN 43760
(3) GOST 6651-94 -09 (Pt: W100 = 1.391)
(4) DIN EN 60584
(5) DIN 43710
(6) GOST 5.585-2001
Set start and end value for analog measuring range
The start value is used to set the analog output current of 0/4 mA within the measuring range
limits of the connected sensor, at which input value an analog output current of 0/4 mA is
output.
The end value is used to set the input value at which an analog output current of 20 mA is
output.
The selected measuring span must be equal to or greater than the minimum measuring span of
the connected sensor.
Rotary switch Value Description
LR1 0…9 Initial value Measuring range, tens digit
LR2 0…9 Initial value Measuring range, units digit
LR3 Source: -1,1,10,100
Sink: -1,1,10,100
Initial value measuring range, factor, Operating mode selec-
tion (source/sink)
UR1 0…9 End value measuring range, tens digit
UR2 0…9 Start value Measuring range, units digit
UR3 Source: -1,1,10,100
Sink: -1,1,10,100
End value measuring range, factor, Current signal selection
(0…20 mA/4…20 mA)

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➤ Use the rotary coding switches LR1, LR2 and LR3 to set the initial value for the analog measur-
ing range and the operating mode (source/sink):
Initial value for analog measuring range: (LR1 × 10 + LR2) × LR3
➤ Use the rotary coding switches UR1, UR3 and UR4 to set the end value for the analog measur-
ing range and the current signal (0…20 mA/4…20 mA):
Final value for analog measuring range: (UR1 × 10 + UR2) × UR3
The following numbers can be set:
-99 (-98)…0 | 1 …99 | 100 (110)…990 |1000 (1100)…9900
The physical unit results from the selected measuring mode (RTD/Ohm/TC/mV)
Save new conguration
➤ Press key T1 (apply config) and keep it pressed for min. 2 sec. and max. 6 sec. Otherwise the
configuration of the instrument switches back in its original state.
The instrument should indicate successful or refused acceptance of the configuration in each
case by an LED signal.
2 wire balancing automatic
The measuring point must be short-circuited in order to carry out the line balancing.
To start the initialization of the automatic line balancing in 2-wire mode, pushbutton T1 must
be pressed three times within two seconds.
A flashing code of the LED indicates that the adjustment has been started. Red and green LED
flash in opposite phase.
During an active automatic line balancing, signaling takes place:
If a constant resistance of < 50 Ω is detected for longer than 5s, the device stores this value Rltg
permanently. The adjustment is completed.
After completion of the adjustment, which is indicated by a LED blink code, the short circuit
must be cancelled.
If the active line balancing is to be canceled, pushbutton T1 (apply config) must be pressed
again three times within two seconds.
It is not permissible to configure the unit while it is operating in a safety application.
The current output in a safety application must not be operated in 0…20mA (zero point) mode.
The device shall be locked against unintended operation/modification.

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Operating instructions
6.3 Operation
➤ If the device is used in low demand mode, proof tests shall be executed periodically accord-
ing to T1.
➤ Ensure that the plug connections and cables are always in good condition.
➤ The device must be replaced immediately if the terminals are faulty or the device has any vis-
ible faults.
➤ If cleaning is required, do not use any liquid or statically charging cleaning agent. Perform
proof tests after each cleaning.
➤ The proof test (see “10 Proof tests“ on page 20)shall be executed each time after installa-
tion and parameterization in order to check the requested function.
➤ For CJC of thermocouples (TCs), the user must ensure that for“CJC internal” the open end
(cold junction) of the thermocouple is led to the terminal of the unit and for“CJC external”
the resistance thermometer (RTD) to be connected must be led to the cold junction of the TC.
From here, the TC must be connected to the unit via copper wires.
➤ RTD/resistor connection type: 2-wire connection: The user must ensure that the configured
line resistance matches the actual line resistance.
➤ RTD/resistor connection type: 3-wire connection: The user must ensure that the live outgoing
line has the same ohmic resistance as the live return line (balanced line).
➤ The nominal voltage of the power supply of the device is 24VDC. It must be operated with a
range of 10…30VDC.
➤ No changes must be made to the parameterization during operation.
6.4 After operation
➤ Undo the terminal connection on the device.
➤ Remove the device from its rail fixing as shown in the figure:
Fig. 4: Remove device
➤ Ensure the proper disposal of the device.

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V01.00 | 2022/03
7 Connection and wiring diagrams
The pin number assignment can be found at the front label.
7.1 Output transistor
7.1.1 Wiring diagrams
Fig. 5: Wiring diagram IM12-TI02-1TCURTDR-1I
Fig. 6: Wiring diagram IMX12-TI02-1TCURTDR-1I
9
10
15 +
16 –
10…30 VDC
X1 X2 X3 X4 X5
Common
Alarm
Output
NC
E1
GN/RD
Pwr/
Error
GN/RD
E1,
A1A
Tint
0/4…20 mA
Source / Sink
A1A
+
–+
–
–
+
TCmV U1
R1
R2
4-wire3-wire2-wire
1
ON
2345
0
1
2
3
4
5
6
7
8
9
8
7
4
3
6
5
RTD / Rsstr +
Sense +
RTD / Rsstr –
Sense –
9
10
15 +
16 –
10…30 VDC
X1 X2 X3 X4 X5
Common
Alarm
Output
NC
E1
GN/RD
Pwr/
Error
8
7
4
3
6
5
GN/RD
E1,
A1A
Tint
0/4…20 mA
Source / Sink
A1A
+
–+
–
–
+
TCmV U1
R1
R2
4-wire3-wire2-wire
1
ON
2345
0
1
2
3
4
5
6
7
8
9
RTD / Rsstr +
Sense +
RTD / Rsstr –
Sense –

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Terms and abbreviations
8 Terms and abbreviations
DC Diagnostic Coverage
FIT 1 FIT is 1 failure per 10E09 hours
FMEDA Failure Modes, Effects and Diagnostic Analysis
HFT Hardware failure tolerance
λAU Undetected Annunciation failure rate (per hour)
Annunciation failures do not directly impact safety but impact the ability to detect a future
fault (such as a fault in diagnostic circuit).
λDD Detected dangerous failure rate (per hour)
λDU Undetected dangerous failure rate (per hour)
λSD Detected safe failure rate (per hour)
λSU Undetected safe failure rate (per hour)
MTTR Mean time to restoration (hour)
PFDavg Average probability of dangerous failure on demand
PFH Probability of dangerous failure per hour
SFF Safe Failure Fraction
SIL Safety Integrity Level
T1 Proof test interval (hour)
Type A „Non-complex”element (all failure modes are well defined); for details see 7.4.4.1.2 of
IEC61508-2
Type B „Complex” element (using micro controlllers or programmable logic); for details see 7.4.4.1.3
of IEC 61508-2
9 Appendix: failures
9.1 Resistance
ΔOhm
Low Range 0…500 Ω 0.2 Ω
High Range 500…5000 Ω 2 Ω
When selecting “RSensor connection mode: 3-wire”the values for ΔOhm are doubled.

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V01.00 | 2022/03
9.2 TC
TC Type ΔTC
DIN EN 60584 Typ A 15 K
DIN EN 60584 Typ B 199 K
DIN EN 60584 Typ C 13 K
DIN EN 60584 Typ E 15 K
DIN EN 60584 Typ J 9 K
DIN EN 60584 Typ K 24 K
DIN EN 60584 Typ N 34 K
DIN EN 60584 Typ R 41 K
DIN EN 60584 Typ S 39 K
DIN EN 60584 Typ T 21 K
DIN 43710 Typ L 6 K
GOST 8.585-2001 Typ A-1 15 K
GOST 8.585-2001 Typ A-2 15 K
GOST 8.585-2001 Typ A-3 15 K
GOST 8.585-2001 Typ L 7 K
GOST 8.585-2001 Typ M 10 K
9.3 RTD
RTD-Type ΔRTD
DIN EN 60751 Platinum Pt50 1.4 K
DIN EN 60751 Platinum Pt500
DIN EN 60751 Platinum Pt100 0.8 K
DIN EN 60751 Platinum Pt1000
DIN 43760 Nickel Ni50 0.9 K
DIN 43760 Nickel Ni500
DIN 43760 Nickel Ni100 0.5 K
DIN 43760 Nickel Ni1000
GOST 6651-94 Platinum Pt50 1.5 K
GOST 6651-94 Platinum Pt500
GOST 6651-94 Platinum Pt100 0.5 K
GOST 6651-94 Platinum Pt1000
GOST 6651-94 Copper Cu50 1 K
GOST 6651-94 Copper Cu500
GOST 6651-94 Copper Cu53 0.9 K
GOST 6651-94 Copper Cu100 0.5 K
GOST 6651-94 Brass CuZn100 0.5 K
When selecting “RSensor connection mode: 3-wire”the values for ΔRTD are doubled.

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Proof tests
10 Proof tests
Proof tests shall be undertaken to reveal dangerous faults which are undected by diagnostic
tests. This means that it is necessary to specify how dangerous undetected faults which have
been noted during the FMEDA can be detected during proof testing.
Ensure that the proof test is only carried out by qualified personnel.
A suggested proof test consists of the following steps:
Step Action
1. Bypass the safety functions and take appropriate action to avoid a false trip.
2. Provide appropriate input-/control signals to the interface modules and verify the expected
signal input/output conditions for the interfaces.
3. Verify if internal fault detection is working in case it is activated.
4. Provide appropriate input-/control signals to the interface modules and verify that the safety
function is carried out correctly.
5. Remove the bypass and otherwise restore normal operation.
Once the test has been completed, document and archive the results.
Proof test coverage: PTC = 97.27 %