turck IMX12-DO Series User guide

Your Global Automation Partner
Solenoid Driver
IMX12-DO
Safety Manual

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1 About this Document 5
2 Scope 5
3 Safety Integrity Level 5
4 Product Description 6
4.1 Safety function 6
4.2 Safe state 6
5 Safety-Planning 6
5.1 Architectural specications 7
5.2 Assumptions 7
5.3 FMEDA results 7
5.4 Examples for using the results 7
5.4.1 Average probability of failure on demand (High Demand mode) 7
5.4.2 Average frequency of dangerous failure (Low Demand mode) 8
6 Safety Operating Instructions 8
6.1 General 8
6.2 Before operation 9
6.3 Operation 11
6.4 After operation 12
7 Appendix: Wiring Diagrams 12
7.1 IMX12-DO01-1U-1U 12
7.2 IMX12-DO01-2U-2U 13
8 Appendix: Terms and Abbreviations 13
9 Appendix: Proof Tests 14
10 Appendix: Document History 14
11 Appendix: Certicate 15
Contents

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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 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, refer to the English
version of the safety manual or contact Turck directly.
2 Scope
This safety manual is valid for the following devices.
Product Number Product Name Number of
channels
Terminal Block Design Power-Bridge
7580100 IMX12-DO01-1U-1U-PR/24VDC 1 screw clamps yes
7580101 IMX12-DO01-1U-1U-0/24VDC 1 screw clamps no
7580102 IMX12-DO01-1U-1U-PR/24VDC/CC 1 spring-type terminals yes
7580103 IMX12-DO01-1U-1U-0/24VDC/CC 1 spring-type terminals no
7580104 IMX12-DO01-2U-2U-PR/24VDC 2 screw clamps yes
7580105 IMX12-DO01-2U-2U-0/24VDC 2 screw clamps no
7580106 IMX12-DO01-2U-2U-PR/24VDC/CC 2 spring-type terminals yes
7580107 IMX12-DO01-2U-2U-0/24VDC/CC 2 spring-type terminals no
Power-Bridge is not safety-related.
3 Safety Integrity Level
The devices are rated to a SIL of
SIL2

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Product Description
4 Product Description
The Solenoid Drivers IMX12-DO are one or two channel devices and feature an intrinsically safe
output with limited current and voltage. Thus making direct connection to loads in the hazard-
ous area possible.
Output A1 is assigned to input E1, output A2 is assigned to E2.
Typical applications are the control of EX I pilot valves as well as the supply of displays and
transmitters.
The following image shows the output characteristic:
24
15
20
10
5
00
U
out
[V]
Iout [mA]1610 403020 50 56
21.5
4.1 Safety function
If a Low signal is present at input [E1, E2], a voltage less than 2 VDC is present at the correspond-
ing output [A1, A2] within maximum 40 ms.
The two channels are not used for the same safety function, e.g. to increase the hardware failure
tolerance to achieve a higher SIL, as they contain common components.
The Power-Bridge is not part of the safety-function.
4.2 Safe state
In the safe state a voltage < 2 V is present at the output [A1, A2].
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.
In case of doubt contact Turck directly.

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5.1 Architectural specications
Due to architectural considerations the following characteristics are specified:
Type A
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 ex-
tended by appropriate measures. For example, heavy temperature fluctuations could decrease
the useful lifetime, as constant temperature below 40 °C could potentially increase the useful
lifetime.
5.2 Assumptions
■Failure rates are constant for 10 years, wear out mechanisms are not included
■Propagation of failures is 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 func-
tion (feedback immune) are excluded.
■Only one input and one output are part of the safety function.
5.3 FMEDA results
The following safety characteristic are the results of the FMEDA.
λSD λSU λDD λDU No eect SFF DC
0 FIT 200 FIT 0 FIT 8 FIT 412 FIT 96 % 0 %
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 function
but is neither a safe nor a dangerous failure. According to IEC 62061 it would be possible to clas-
sify the “No effect” failures as“Safe Undetected” failures. Not doing so represents the worst-case.
5.4 Examples for using the results
The following sections provide information about the probability of failures in high demand
and low demand mode according to IEC 61508.
5.4.1 Average probability of failure on demand (High Demand mode)
The PFH values are based on a worst-case diagnostic test rate and a reaction time of 20ms. The
ratio of the diagnostic test rate to the demand rate shall equal or exceed 100.
PFH
8.20E-09 1/h

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Safety Operating Instructions
5.4.2 Average frequency of dangerous failure (Low Demand mode)
With the FMEDA results and the values specified in the following table, the average frequency
of dangerous failure can be calculated:
T1 8760 h
MTTR 24 h
PFDavg
3.91E-05
6 Safety Operating Instructions
6.1 General
➤ The device must be registered online: www.turck.com/SIL or with the supplied SIL registra-
tion card. This must be filled in with all required information first of all 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.
ūThe temperature on the exterior sidewall of the housing can deviate considerably from the
temperature in the control cabinet.
ūThe temperature on the exterior sidewall of the housing must be observed in a steady state.
ūIn case the temperature on the exterior sidewall of the housing is higher, the failure rates
from „5.3 FMEDA results“ on page7 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
radiation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 increase the requirements of IEC
61326-3.1.
➤ If there is a visible error, e. g. defective housing the device must not be used.

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➤ 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 an der Ruhr
Germany
6.2 Before operation
➤ Fasten the device to a rail according EN 60715 (TH35) as follows:
Fig. 1: Fasten the device
➤ Connect cables according to the wiring diagrams in „7 Appendix: Wiring Diagrams“ on
page12
➤ Use cables with 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.

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Safety Operating Instructions
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.
0.5 Nm
(4.43 LBS-inc)
0.2…2.5 mm2
(24…13 AWG)
1
2
7 mm
Fig. 2: Connection with screw terminals

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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.
2
1
0.2…2.5 mm2
(24…13 AWG)
7 mm
Fig. 3: Connection with spring-type terminals
➤ Make sure that only suitable equipment, e.g. sensors,are connected to the device (see „7 Ap-
pendix: Wiring Diagrams“ on page12).
➤ Make sure that a suitable power supply with the following characteristic is used:
Minimum voltage 10 V
Maximum voltage 30 V
Minimum power 4 W
The proof test (see „9 Appendix: Proof Tests“ on page14)shall be executed in order to
check the requested function.
The device shall be locked against unintended operation/modification.
6.3 Operation
➤ If the device is used in low demand mode, proof tests shall be executed (see „9 Appendix:
Proof Tests“ on page14).
➤ 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(see „9 Appendix: Proof Tests“ on page14).

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Appendix: Wiring Diagrams
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 dispose of the device.
7 Appendix: Wiring Diagrams
The pin number assignment can be found at the front label.
7.1 IMX12-DO01-1U-1U
16 –
15 +
GN
Pwr
YE/RD 10
9
10…30 VDC
A1
7 +
8 –
E1
U
I
0…5 VDC LOW
10…30 VDC HIGH

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7.2 IMX12-DO01-2U-2U
8 Appendix: 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 failure on demand
PFH Average frequency of dangerous failure
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
16 –
15 +
GN
Pwr
YE/RD 10
9
10…30 VDC
A1
7 +
8 –
E1
U
I
0…5 VDC LOW
10…30 VDC HIGH
YE/RD 12
11
A2
5 +
6 –
E2
U
I

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Appendix: Proof Tests
9 Appendix: Proof Tests
According to section 7.4.5.2 f) of IEC 61508-2 proof tests shall be undertaken to reveal danger-
ous faults which are undetected 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 function and take appropriate action to avoid a false trip.
2. Provide appropriate input-/control signals to the interface modules and verify the ex-
pected 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.
This test will detect 99 % of possible dangerous undetected failures.
Once the test has been completed, document and archive the results.
10 Appendix: Document History
Document Version Date Modications
1.0 2015-10-15 Initial version
2.0 2016-08-15 – Online registration
– Useful lifetime updated
– 7 mm cable ends
– Terms updated
3.0 2018-07-06 – headings high-/low-demand updated
– note for 61326-3-1 modified: exceed (not increase)
– note for safety function added: Power-Bridge is not part
4.0 2020-04-01 – Ambient temperature specified more precisely
– Factor 2.5 for 60 °C ambient temperature added
– Application SN 29500 specified

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11 Appendix: Certicate
The certificate can be found on the internet at www.turck.com.

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