IFC 110 F V2.0 IFC 110 F-EEx V2.0 - Krohne

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Sect. 1.3.6 Part A System installation and start-up1.3.6 EEx-Connection diagrams for power supply and flow sensorsPLEASE NOTE!• The figures in brackets indicate the stranded drain wires for the shields (see cross-sectionaldrawing of signal cable in Section 1.3.1).• The connections for the intrinsically safe electrode circuit including the shield terminalsare safety-separated up to a peak value of 375 V from the terminals for thepower supply,for the inputs/outputs and for the field circuit. They are galvanically isolated from the housing(PE/PA).• For connection of the intrinsically safe electrode circuit including shield terminals to theprimary head, please refer to Item 12 in EN 60079-14.The non-intrinsically safe field circuit to be connected to the primary head in keeping with therequirements of Item 9 in EN 60079-14 .• The non-intrinsically safe input and output circuits may only be routed into the hazardousarea in compliance with appropriate measures as specified in EN 60079-14.• Supply power (terminals 11,12)In conformity with current regulations for electrical installations, an isolating facility is requiredto be provided for the signal converter. The housing of the IFC 110 F – EEx signal convertermust be incorporated in the equipotential bonding system (via external PA connection).Note!A PE safety conductor is not connected if a functional extra-low voltage with safetyseparation (PELV) is used. Grounding is then carried out by way of the equipotentialbonding conductor.• Electrode circuit (terminals 1, 20, 2, 3, 30 and shield terminal S)In conformity with the requirements for separation of intrinsically safe circuits, Category ib toEN 50 020, the cable for the intrinsically safe electrode circuit must, up to the terminals, beseparated from all non-intrinsically safe circuits.Terminals 20 and 30 are optionally provided for connecting cables with single shielding. Theterminal for the outer shield (S) is capacitance grounded in the signal converter. The outeroverall shield to be connected by the shortest possible wire to the shield terminal. Shields tobe carefully insulated from ground and from each other.• Field circuit FSV (terminals 7, 8)The field circuit is all-pole protected on the FSV circuit board with an internal fusible link160mA / 250V.• Input/output circuitsThe connection is made to functional extra-low voltage circuits with safety separation (PELV).The I/O functions and technical data are described in the Standard Installation and OperatingInstructions.IMPORTANT!For EEx versions, also pay regard to all directions included in Sect. 6.1 and 13.Only the EEx flow sensor may be installed in the hazardous area. The EExcertified signal converter must be installed outside the hazardous area!*Do not remove the internal connection (cable) inside the terminal compartment of the signalconverter (yellow/green wire) between the U-clamp terminal and terminal 10 (protectiveconductor for protection class I instruments).14 IFC 110 F 05/2003
Part A System installation and start-up Sect. 1.3.6Process temperature below 150°C (302°F)I Signal cable A (type DS) II Signal cable B (type BTS)IFC 110 F V 2.0 IFC 110 F V 2.0Hazardous areaHazardous areaFlow sensorFlow sensorProcess temperature above 150°C (302°F)III Signal cable A (type DS) IV Signal cable B (type BTS)IFC 110 F V 2.0 IFC 110 F V 2.0Hazardous areaHazardous areaFlow sensorFlow sensor05/2003 IFC 110 F 15
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Notice102 IFC 110 F 05/2003
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AustraliaKROHNE Australia Pty Ltd.U
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IFC 110 F V2.0 IFC 110 F-EEx V2.0 - Krohne

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