Pepperl+Fuchs SIL KCD2-SCS-2 Bedienungsanleitung

ISO9001

Functional Safety

SMART Transmitter Power

Supply/SMART Current

Driver

KCD2-SCS-(Ex)2(.SP)

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 KCD2-SCS-(Ex)2(.SP)

Contents

2022-11

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 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

2.4 Standards and Directives for Functional Safety . . . . . . . . . . . . . . . . . . . 9

3 Planning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

3.1 System Structure. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

3.2 Assumptions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

3.3 Safety Function and Safe State . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

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

3.5 Useful Lifetime . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

4 Mounting and Installation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

4.1 Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

5 Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17

5.1 Proof Test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17

6 Maintenance and Repair . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20

7 List of Abbreviations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21

Functional Safety KCD2-SCS-(Ex)2(.SP)

Contents

2022-11

Functional Safety KCD2-SCS-(Ex)2(.SP)

Introduction

2022-11

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.

Note

For specific device information such as the year of construction, scan the QR code

on the device. As an alternative, enter the serial number in the serial number search

at www.pepperl-fuchs.com.

2022-11

Functional Safety KCD2-SCS-(Ex)2(.SP)

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 KCD2-SCS-(Ex)2(.SP)

Introduction

2022-11

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.

2022-11

Functional Safety KCD2-SCS-(Ex)2(.SP)

Product Description

2 Product Description

2.1 Function

KCD2-SCS-2(.SP)

This signal conditioner provides galvanic isolation between field circuits and control circuits.

Each device channel works as a transmitter power supply or a current driver.

The device transfers data by using a current signal.

The device supports a bi-directional communication for SMART devices that use current

modulation to transmit data and voltage modulation to receive data.

For current driver operation, an open field circuit presents a high impedance to the control side

to allow lead breakage to be monitored by control systems.

The device is mounted on a 35 mm DIN mounting rail according to EN 60715.

SP Version

The devices are available with screw terminals or spring terminals.

The type code of the versions of the devices with spring terminals has the extension .SP.

KCD2-SCS-Ex2(.SP)

This isolated barrier is used for intrinsic safety applications.

Each device channel works as a transmitter power supply or a current driver.

The device transfers data by using a current signal.

The device supports a bi-directional communication for SMART devices that use current

modulation to transmit data and voltage modulation to receive data.

For current driver operation, an open field circuit presents a high impedance to the control side

to allow lead breakage to be monitored by control systems.

The device is mounted on a 35 mm DIN mounting rail according to EN 60715.

SP Version

The devices are available with screw terminals or spring terminals.

The type code of the versions of the devices with spring terminals has the extension .SP.

2.2 Interfaces

The device has the following interfaces.

•Safety relevant interfaces: input I, input II, output I, output II

•Non-safety relevant interfaces: none

The HART communication is not relevant for functional safety.

Note

For corresponding connections see datasheet.

Functional Safety KCD2-SCS-(Ex)2(.SP)

Product Description

2022-11

2.3 Marking

2.4 Standards and Directives for Functional Safety

Device specific standards and directives

System-specific standards and directives

Pepperl+Fuchs Group

Lilienthalstraße 200, 68307 Mannheim, Germany

Internet: www.pepperl-fuchs.com

KCD2-SCS-2, KCD2-SCS-2.SP,

KCD2-SCS-Ex2, KCD2-SCS-Ex2.SP 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 61511-1:2016+COR1:2016+A1:2017

EN 61511-1:2017+A1:2017

Functional safety –Safety instrumented systems for the process

industry sector (user)

2022-11

Functional Safety KCD2-SCS-(Ex)2(.SP)

Planning

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 T1

value (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.

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