62 For your safetyVEGAFLEX 83 • Two-wire 4 … 20 mA/HART44225-EN-1901312.5 EU conformityThe device fulfils the legal requirements of the applicable EU direc-tives. By affixing the CE marking, we confirm the conformity of theinstrument with these directives.You can find the EU conformity declaration on our website underwww.vega.com/downloads.Electromagnetic compatibilityInstruments in four-wire or Ex-d-ia version are designed for use in anindustrial environment. Nevertheless, electromagnetic interferencefrom electrical conductors and radiated emissions must be taken intoaccount, as is usual with class A instruments according to EN 61326-1. If the instrument is used in a different environment, the electromag-netic compatibility to other instruments must be ensured by suitablemeasures.2.6 SIL qualification according to IEC 61508The Safety Integrity Level (SIL) of an electronic system is used to as-sess the reliability of integrated safety functions.For detailed specification of the safety requirements, multiple SILlevels are specified according to safety standard IEC 61508. You canfind detailed information in chapter "Functional safety (SIL)" of theoperating instructions.The instrument meets the specifications of IEC 61508: 2010 (Edi-tion 2). It is qualified for single-channel operation up to SIL2. Theinstrument can be used homogeneously redundant up to SIL3 inmulti-channel architecture with HFT 1.2.7 NAMUR recommendationsNAMUR is the automation technology user association in the processindustry in Germany. The published NAMUR recommendations areaccepted as the standard in field instrumentation.The device fulfils the requirements of the following NAMUR recom-mendations:• NE 21 – Electromagnetic compatibility of equipment• NE 43 – Signal level for fault information from measuring transduc-ers• NE 53 – Compatibility of field devices and display/adjustmentcomponents• NE 107 – Self-monitoring and diagnosis of field devicesFor further information see www.namur.de.2.8 Installation and operation in the USA andCanadaThis information is only valid for USA and Canada. Hence the follow-ing text is only available in the English language.Installations in the US shall comply with the relevant requirements ofthe National Electrical Code (ANSI/NFPA 70).