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Safety Manual SIL KCD2-STC-(Ex)1.HC(.SP), HiC2025HC

Introduction

1

Introduction

1.1

General Information

This manual contains information for application of the device in functional safety 

related loops.
The corresponding data sheets, the operating instructions, the system 

description, the Declaration of Conformity, the EC-Type-Examination Certificate, 

the Functional Safety Assessment and applicable Certificates (see data sheet) 

are integral parts of this document.
The documents mentioned are available from 

www.pepperl-fuchs.com

 or by 

contacting your local Fuchs representative.
Mounting, installation, commissioning, operation, maintenance and disassembly 

of any devices may only be carried out by trained, qualified personnel. The 

instruction manual must be read and understood.
When it is not possible to correct faults, the devices must be taken out of service 

and action taken to protect against accidental use. Devices should only be 

repaired directly by the manufacturer. De-activating or bypassing safety functions 

or failure to follow the advice given in this manual (causing disturbances or 

impairment of safety functions) may cause damage to property, environment or 

persons for which Fuchs GmbH will not be liable. 
The devices are developed, manufactured and tested according to the relevant 

safety standards. They must only be used for the applications described in the 

instructions and with specified environmental conditions, and only in connection 

with approved external devices.

1.2

Intended Use

The devices are available as safe area version (KCD2-STC-1.HC(.SP)) where 

they can be used as a signal conditioner providing isolation for non-intrinsically 

safe applications. Also the devices are available as hazardous area version 

(KCD2-STC-Ex1.HC(.SP), HiC2025HC) allowing use as isolated barriers for 

intrinsic safety applications.
The device supplies 2-wire transmitters in the field, and can also be used with 

current sources.
It transfers the analog input signal to the safe area as an isolated current value.
Bi-directional communication is supported for SMART transmitters that use 

current modulation to transmit data and voltage modulation to receive data.
The output is selected as a current source, current sink, or voltage source via 

DIP switches.
In the KCD2-STC-(Ex)1.HC(.SP) test sockets for the connection of 

HARTcommunicators are integrated into the terminals of the device.

Содержание SIL KCD2-STC-1.SP

Страница 1: ...ISO9001 2 SMART Transmitter Power Supply KCD2 STC Ex 1 HC SP HiC2025HC PROCESS AUTOMATION SAFETY MANUAL SIL ...

Страница 2: ... 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 Safety Manual SIL KCD2 STC Ex 1 HC SP HiC2025HC ...

Страница 3: ... 5 2 Planning 6 2 1 System Structure 6 2 1 1 Low Demand Mode 6 2 1 2 High Demand Mode 6 2 1 3 Safe Failure Fraction 6 2 2 Assumptions 7 2 3 Safety Function and Safe State 8 2 4 Characteristic Safety Values 9 3 Safety Recommendation 10 3 1 Interfaces 10 3 2 Configuration 10 3 3 Useful Life Time 10 3 4 Installation and Commissioning 11 4 Proof Test 12 4 1 Proof Test Procedure 12 5 Abbreviations 14 ...

Страница 4: ...ances or impairment of safety functions may cause damage to property environment or persons for which Pepperl Fuchs GmbH will not be liable The devices are developed manufactured and tested according to the relevant safety standards They must only be used for the applications described in the instructions and with specified environmental conditions and only in connection with approved external dev...

Страница 5: ...on Pepperl Fuchs GmbH Lilienthalstrasse 200 68307 Mannheim Germany Up to SIL2 1 4 Relevant Standards and Directives Device specific standards and directives Functional safety IEC 61508 part 2 edition 2000 Standard of functional safety of electrical electronic programmable electronic safety related systems product manufacturer Electromagnetic compatibility EN 61326 1 2006 NE 21 2006 System specific...

Страница 6: ... loop is assumed to be higher than once per year The relevant safety parameters to be verified are PFH 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 architecture 2 1 3 Safe Failure Fraction The safe failure fraction describes the ratio of all safe failures and dangerous detected f...

Страница 7: ...IEC 61508 2 for SIL2 sub system The stress levels are average for an industrial environment and can be compared to the Ground Fixed Classification of MIL HNBK 217F Alternatively the assumed environment is similar to IEC 60654 1 Class C sheltered location with temperature limits within the manufacturer s rating and an average temperature over a long period of time of 40 ºC Humidity levels are assum...

Страница 8: ...e DIP Switch Settings KCD2 STC Ex 1 HC SP DIP Switch Settings HiC2025HC Safe State The safe state is defined as the output reaching values 3 6 mA 0 9 V or 20 5 mA 5 125 V Reaction Time The reaction time for all safety functions is 20 ms Function S1 S2 S3 S4 Current source 4 mA 20 mA II II I II Voltage source 1 V 5 V II II I I Current sink 4 mA 20 mA II I II II Table 2 1 Function S1 S2 S3 S4 Curren...

Страница 9: ...t type and documentation FMEDA report Device type A Mode of operation Low Demand Mode or High Demand Mode HFT 0 SIL 2 Safety function Signal transfer λs 126 3 FIT λdd 0 FIT λdu 50 3 FIT λno effect 228 3 FIT λtotal safety function 405 FIT λnot part 32 2 FIT SFF 87 58 MTBF 1 261 years PFH 5 03 x 10 8 1 h PFDavg for Tproof 1 year 2 20 x 10 4 PFDavg for Tproof 2 years 4 41 x 10 4 PFDavg for Tproof 5 y...

Страница 10: ...only applies provided that the useful life time of components is not exceeded Beyond this useful life time the result of the probabilistic calculation is meaningless as the probability of failure significantly increases with time The useful life time is highly dependent on the component itself and its operating conditions temperature in particular for example the electrolytic capacitors can be ver...

Страница 11: ...y opto coupler which can produce dangerous undetected failures and if the ambient temperature is significantly below 60 C Please note that the useful life time refers to the constant failure rate of the device The effective life time can be higher 3 4 Installation and Commissioning Installation has to consider all aspects regarding the SIL level of the loop During installation or replacement of th...

Страница 12: ...ircuits that were operated with circuits of other types of protection may not be used as intrinsically safe circuits afterwards Power supply set at nominal voltage of 24 V DC Process calibrator with mA current source sink feature accuracy better than 20 µA The entire measuring loop must be put out of service and the process held in safe condition by means of other measures Prepare a test set up fo...

Страница 13: ...og input Current output or Voltage output or Current sink Supply HiC2025HC 11 14 5 1 4 1b SL2 5a 5b SL1 8a 7a Termination Board Zone 0 1 2 Div 1 2 Zone 2 Div 2 Multimeter V Multimeter V 4 mA 20 mA 4 mA 20 mA I supply Passive input Input sensor 4 wire Tx externally powered Active input Input sensor 2 wire Tx loop powered Supply Supply 24 V DC Power supply Logic solver analog input Current output or...

Страница 14: ...ility of failures of components in the safety path that have no effect on the safety function λnot part Probability of failure of components that are not in the safety path λtotal safety function Safety function HFT Hardware Fault Tolerance MTBF Mean Time Between Failures MTTR Mean Time To Repair PFDavg Average Probability of Failure on Demand PFH Probability of dangerous Failure per Hour PTC Proo...

Страница 15: ...Safety Manual SIL KCD2 STC Ex 1 HC SP HiC2025HC Notes 2012 07 15 ...

Страница 16: ...l fuchs com PROCESS AUTOMATION PROTECTING YOUR PROCESS Worldwide Headquarters Pepperl Fuchs GmbH 68307 Mannheim Germany Tel 49 621 776 0 E mail info de pepperl fuchs com For the Pepperl Fuchs representative closest to you check www pepperl fuchs com contact TDOCT 2750_ENG 07 2012 ...

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