Pepperl+Fuchs HiC284 Series Manual de usuario

ISO9001

Functional Safety

Switch Amplifier HiC284*

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: +49 621 776 - 0

E-mail: info@de.pepperl-fuchs.com

North American Headquarters

Pepperl+Fuchs Inc.

1600 Enterprise Parkway

Twinsburg, Ohio 44087

USA

Phone: +1 330 425-3555

E-mail: [email protected].com

Asia Headquarters

Pepperl+Fuchs Pte. Ltd.

P+F Building

18 Ayer Rajah Crescent

Singapore 139942

Phone: +65 6779-9091

E-mail: [email protected]

https://www.pepperl-fuchs.com

Functional Safety HiC284*

Contents

2020-07

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 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

2.3 Marking . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

2.4 Standards and Directives for Functional Safety . . . . . . . . . . . . . . . . . . . 8

3 Planning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

3.1 System Structure. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

3.2 Assumptions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

3.3 Safety Function and Safe State . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

3.4 Characteristic Safety Values . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

3.5 Useful Lifetime . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

4 Mounting and Installation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

4.1 Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

5 Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

5.1 Proof Test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

5.2 Proof Test Procedure. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17

6 Maintenance and Repair . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

7 List of Abbreviations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20

Functional Safety HiC284*

Contents

2020-07

Functional Safety HiC284*

Introduction

2020-07

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.

2020-07

Functional Safety HiC284*

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 HiC284*

Introduction

2020-07

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.

2020-07

Functional Safety HiC284*

Product Description

2 Product Description

2.1 Function

This isolated barrier is used for intrinsic safety applications.

The device transfers digital signals from NAMUR sensors or dry contacts from the hazardous

area to the non-hazardous area.

The proximity sensor or switch controls two passive transistors for the safe area load.

Both transistor outputs are isolated from each other and isolated from the power supply.

The output changes state when the input signal changes state.

Via switches the mode of operation can be reversed and the line fault detection can

be switched off.

This device mounts on a HiC termination board.

2.2 Interfaces

The device has the following interfaces.

•Safety relevant interfaces:

HiC2841: input I, output I, output II (optional)

HiC2842: input I, input II, output I, output II

•Non-safety relevant interfaces: fault indication 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 Group

Lilienthalstraße 200, 68307 Mannheim, Germany

Internet: www.pepperl-fuchs.com

HiC2841, HiC2842 Up to SIL 2

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 2016:

Functional safety –Safety instrumented systems

for the process industry sector (user)

Functional Safety HiC284*

Planning

2020-07

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:

•the PFDavg value (average Probability of dangerous Failure on Demand) and

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

•the SFF value (Safe Failure Fraction)

•the HFT architecture (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

•the SFF value (Safe Failure Fraction)

•the HFT architecture (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 the elements and subsystems, but not of a single device.

Nevertheless the SFF of the device is given in this document for reference.

2020-07

Functional Safety HiC284*

Planning

3.2 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.

•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.

•Since the outputs of the device use common components, these outputs must not

be used in the same safety function.

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.

•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.

•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.

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