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11 Configuring Communication HIMaxPage 64 of 70HI 801 003 D Rev.2.0
HIMaxAppendixAppendixIncreasing the SIL of Sensors and ActuatorsSafety-related HIMax controllers are used in safety applications up to SIL 3. This requiresthat the sensors and actuators (signalers and actuating elements) in use also achieve therequired SIL.In some cases, sensors or actuators may not be available for the requirements defined inthe application, such as process value, range of value, SIL, etc. If this is the case, proceedas follows:• For inputs: Use any of the available sensors that meet all of the requirements with theexception of the SIL value. Use enough of them such that their combination provide aninput signal with the required SIL.• For outputs: Use any of the available actuators that meet all of the requirements with theexception of the SIL. Use enough of them such that their combination affects theprocess with the required SIL.With inputs, associate the values of the individual sensors and their status information witha part of the user program such that a global variable with the required SIL results from thiscombination.With outputs, distribute the value of a global variable among multiple outputs such that theprocess adopts the safe state if a fault occurs. Further, the combination of actuators mustbe able to affect the process in the required manner (for example, the serial or parallelconnection of valves).For both inputs and outputs, design the system to have the required number of sensors andactuators for a given process variable until the greatest possible degree of safety isachieved for the process. SILence, the calculation tool manufactured by HIMA, can be usedto calculate the SIL.iThe use of multiple sensors and actuators for inputting or outputting a single signal asdescribed here is only intended as a means of increasing the SIL. Do not confuse this withthe use of redundant inputs or outputs for improving availability!For information on how to achieve the required SIL for sensors and actuators, see IEC61511-1, Section 11.4.HI 801 003 D Rev.2.0 Page 65 of 70
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SAFETYHIMax ®Safety Manual
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Table of contentsHIMax3.5 Certifica
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Table of contentsHIMax10.2.9 Accept
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1 Safety Manual HIMax1.5 GlossaryTe
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2 Intended Use HIMaxStandardEC/EN 6
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Page 16 and 17: 3 Safety Concept for Using the PES
Page 24 and 25: 4 Processor Modules HIMaxNOTESystem
Page 26 and 27: 5 System Bus Module HIMaxWARNINGPhy
Page 28 and 29: 6 Communication Module HIMax6 Commu
Page 30 and 31: 7 Input Modules HIMaxNOTICESystem m
Page 32 and 33: 7 Input Modules HIMax7.6 Checklists
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Page 36 and 37: 7 Input Modules HIMax7.7 Safety-Rel
Page 38 and 39: 7 Input Modules HIMax7.8 Checklist
Page 40 and 41: 8 Output Modules HIMax8 Output Modu
Page 42 and 43: 8 Output Modules HIMaxIn this state
Page 44 and 45: 8 Output Modules HIMax8.7 Checklist
Page 46 and 47: 9 Software HIMax9 SoftwareThe softw
Page 48 and 49: 9 Software HIMax9.4 Resource Parame
Page 50 and 51: 9 Software HIMaxExample: A key swit
Page 52 and 53: 9 Software HIMaxThe user only need
Page 54 and 55: 10 User program HIMaxSensors (digit
Page 56 and 57: 10 User program HIMax10.2.5 Downloa
Page 58 and 59: 10 User program HIMax10.2.10 Checkl
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Page 66 and 67: AppendixHIMaxIndex of FiguresFigure
Page 68: AppendixHIMaxIndexanalog inputsuse
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