Pepperl+Fuchs HiD2024 Manual de usuario

Functional Safety

SMART Transmitter Power

Supply/Current Driver

HiD2024

PROCESS AUTOMATION

MANUAL

ISO9001

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 HiD2024

Content

2016-06

1 Introduction. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

1.1 Contents . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

1.2 Safety Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

1.3 Symbols Used . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

2 Product Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

2.1 Function . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

2.2 Interfaces. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

2.3 Marking . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

2.4 Standards and Directives for Functional Safety. . . . . . . . . . . . 7

3 Planning. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

3.1 System Structure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

3.2 Assumptions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

3.3 Safety Function and Safe State . . . . . . . . . . . . . . . . . . . . . . . . 10

3.4 Characteristic Safety Values . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

3.5 Useful Life Time . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

4 Mounting and Installation . . . . . . . . . . . . . . . . . . . . . . . . 14

4.1 Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

5 Operation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

5.1 Proof Test Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

6 Maintenance and Repair . . . . . . . . . . . . . . . . . . . . . . . . . 18

7 Abbreviations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

Functional Safety Manual HiD2872, HiC2873(Y1), HiD2876, HiC2877

2016-06

Functional Safety HiD2024

Introduction

1Introduction

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:

• EC-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 HiD2024

Introduction

2016-06

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.

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.

2016-06

Functional Safety HiD2024

Introduction

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 HiD2024

Product Description

2016-06

2 Product Description

2.1 Function

This isolated barrier is used for intrinsic safety applications.

Bi-directional communication is supported for SMART transmitters that use

current modulation to transmit data and voltage modulation to receive data.

The outputs are fully isolated from the inputs, the power supply, and each other.

An open field circuit presents a high impedance to the control side to allow alarm

conditions to be monitored by control systems.

This device mounts on a HiD Termination Board.

2.2 Interfaces

The device has the following interfaces.

• Safety relevant interfaces:input I to input IV and output I to output IV

• Non-safety relevant interfaces: power supply, collective error message output

2.3 Marking

2.4 Standards and Directives for Functional Safety

Device-specific standards and directives

System-specific standards and directives

Note!

For corresponding connections see datasheet.

Pepperl+Fuchs GmbH

Lilienthalstraße 200, 68307 Mannheim, Germany

HiD2024 Up to SIL 2

Functional safety IEC/EN 61508, part 2, 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 HiD2024

2016-06

Functional Safety HiD2024

Planning

3Planning

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 T1value (proof test interval that has a direct impact on the PFDavg 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:

• the PFH value (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 HiD2024

Planning

2016-06

3.2 Assumptions

The following assumptions have been made during the FMEDA:

• 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 PFDavg value

of the SIF (Safety Instrumented Function) should be smaller than 10-2, hence

the maximum allowable PFDavg 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.

• Failure rate based on the Siemens standard SN29500.

• Failure rates are constant, wear is not considered.

• The safety-related device is considered to be of type Adevice with a hardware

fault tolerance of 0.

• 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.

• 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 application program in the programmable logic controller (PLC) is

configured to detect underrange and overrange failures.

• The devices are not protected against power supply failures. It is within the

responsibility of the user to ensure that low supply voltages are detected and

adequate reaction on this fault is implemented.

2016-06

Functional Safety HiD2024

Planning

3.3 Safety Function and Safe State

Safe State

The safe state depends on the respective application.

Mostly a value within the signal range is defined, below which (low limit value) or

above which (high limit value) the safe state is initiated.

As this individual limit value and this direction are not known to Pepperl+Fuchs, a

discrepancy of more than 2 % in the signal path is as worst case rated dangerous

undetected. Furthermore, the output values below 3.6 mA or above 21.5 mA

indicate failures that are considered as dangerous detected.

Ensure that the programmable controller is programmed to react to these values

suitably.

Safety Function

The device transfers an analog signal from the input to the output with a tolerance

of 2 % of the measured range.

You have the possibility for each channel to define different functions to fit your

safety application.

DIP Switch Settings

Potentiometer Settings

You can adjust the signal transfer accuracy via the potentiometers.

Reaction Time

The reaction time for all safety functions is < 100 ms.

Function Switch settings

S1 S2 S3 S4

Analog input with source output 4 mA ... 20 mA OFF OFF OFF ON

Analog input with source output 1 V ... 5 V OFF ON OFF ON

Analog input with sink output 4 mA ... 20 mA OFF OFF ON OFF

Analog output ON OFF ON OFF

Table 3.1

Note!

For more information see the corresponding datasheets.

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