{"product_id":"kfd2-sr3-ex2-2s-pepperl-fuchs-switch-amplifier","title":"KFD2-SR3-EX2.2S Pepperl+Fuchs Switch Amplifier K-System","description":"\u003cp\u003eThe \u003cstrong\u003ePepperl+Fuchs KFD2-SR3-EX2.2S\u003c\/strong\u003e serves as the primary \u003cstrong\u003eKFD2-SR3\u003c\/strong\u003e Switch Amplifier utilized to execute galvanic isolation and discrete signal conditioning across intrinsic safety (Ex i) barriers platforms.\u003c\/p\u003e\n\u003ch3\u003eNomenclature \u0026amp; Functional Breakdown\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eKFD2\u003c\/strong\u003e: K-System housing design for 35 mm DIN rail or Power Rail installation.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSR3\u003c\/strong\u003e: Switch amplifier functional group with relay contact outputs.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEX2\u003c\/strong\u003e: Dual-channel galvanically isolated intrinsically safe input circuit.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e2S\u003c\/strong\u003e: Two active relay outputs per channel (dual changeover or safe-state execution).\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eOperational Technical Data\u003c\/h3\u003e\n\u003cfigure\u003e\n\u003ctable\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003eParameter\u003c\/th\u003e\n\u003cth\u003eSpecification\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eModel\u003c\/td\u003e\n\u003ctd\u003eKFD2-SR3-EX2.2S\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBrand\u003c\/td\u003e\n\u003ctd\u003ePepperl+Fuchs\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOrigin\u003c\/td\u003e\n\u003ctd\u003eGermany\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWeight\u003c\/td\u003e\n\u003ctd\u003eApprox. 150 g\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eShipping Dimensions\u003c\/td\u003e\n\u003ctd\u003e20 mm x 119 mm x 115 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOperating Temp\u003c\/td\u003e\n\u003ctd\u003e-20 to 60 deg C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePower Consumption\u003c\/td\u003e\n\u003ctd\u003e\u0026lt;= 1.2 W\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRated Voltage\u003c\/td\u003e\n\u003ctd\u003e19 to 30 VDC via power terminal or Power Rail\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInput Type\u003c\/td\u003e\n\u003ctd\u003eNAMUR proximity sensors or dry contact switches\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSwitching Frequency\u003c\/td\u003e\n\u003ctd\u003e\u0026lt;= 10 Hz\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eGalvanic Isolation\u003c\/td\u003e\n\u003ctd\u003eReinforced isolation according to EN 60079-11\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/figure\u003e\n\u003ch3\u003eIntrinsically Safe Circuit Topology and Shielding Standards\u003c\/h3\u003e\n\u003cp\u003eGalvanically isolated channels maintain strict intrinsic safety (Ex i) barriers separation between field field devices and control systems. Standardized housing contours provide high DIN-rail mounting stability under ambient mechanical stress, preventing earth loops while maintaining internal surge voltage protection limits and low protocol conversion latencies across field signal processing loops.\u003c\/p\u003e\n\u003ch3\u003eScope of Delivery\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e1 x Pepperl+Fuchs KFD2-SR3-EX2.2S Switch Amplifier Unit\u003c\/li\u003e\n\u003cli\u003e2 x Blue Intrinsically Safe Field Terminal Blocks\u003c\/li\u003e\n\u003cli\u003e2 x Black Control Side \/ Power Supply Terminal Blocks\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eField Wiring \u0026amp; Mechanical Assembly\u003c\/h3\u003e\n\u003ch4\u003eRail Attachment\u003c\/h4\u003e\n\u003cp\u003eMount the module vertically onto a standard 35 mm DIN rail or integrated Power Rail bus system. Ensure top and bottom housing locking tabs snap securely into place.\u003c\/p\u003e\n\u003ch4\u003eHazardous Area Input Wiring\u003c\/h4\u003e\n\u003cp\u003eTerminate field lines from NAMUR sensors or dry contacts at the blue terminals (Terminals 1-3 for Channel 1, Terminals 4-6 for Channel 2). Observe polarity requirements for active NAMUR loops.\u003c\/p\u003e\n\u003ch4\u003eControl Side Interconnection\u003c\/h4\u003e\n\u003cp\u003eConnect output relay circuits to black terminals 7 through 12. Connect 24 VDC auxiliary power to terminals 14+ and 15- if Power Rail distribution is not utilized.\u003c\/p\u003e\n\u003ch3\u003eFAQ Technical Reference\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp\u003eWhat sensor types are directly compatible with the input channels of this module?\u003c\/p\u003e\n\u003cp\u003eInputs accept standard NAMUR proximity sensors according to EN 60947-5-6 or potential-free mechanical switch contacts.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eHow are line fault detection features configured for mechanical switch inputs?\u003c\/p\u003e\n\u003cp\u003eResistors must be connected across mechanical contacts (1 kOhm in series, 10 kOhm parallel) to allow line fault monitoring.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eWhat output action occurs when a field cable break or short-circuit is detected?\u003c\/p\u003e\n\u003cp\u003eThe internal output relay de-energizes into a fail-safe state, and the local fault LED indicates an active line error.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eCan the operating direction of the output relays be inverted on site?\u003c\/p\u003e\n\u003cp\u003eDIP switches located on the side panel allow independent switching direction setting (normal or inverted) per channel.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eWhat voltage limit applies to the output relay contact network?\u003c\/p\u003e\n\u003cp\u003eRelay contacts are rated for switching max. 253 VAC at 2 A or 40 VDC at 2 A non-inductive resistive load.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eHow is functional insulation tested between hazardous and non-hazardous terminals?\u003c\/p\u003e\n\u003cp\u003eGalvanic isolation withstands test voltages up to 2.5 kV AC between input, output, and power supply circuits.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eIs external power wiring necessary when using the module with a Power Rail?\u003c\/p\u003e\n\u003cp\u003eDirect clip contacts power the unit via Power Rail, rendering individual 24 VDC terminal wiring redundant.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eWhat conductor cross-sections are supported by the pluggable screw terminals?\u003c\/p\u003e\n\u003cp\u003ePluggable terminal blocks accept solid or flexible copper conductors up to 2.5 mm square (AWG 14-24).\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Pepperl+Fuchs","offers":[{"title":"Default Title","offer_id":47508764590253,"sku":"KFD2-SR3-EX2.2S","price":156.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0733\/1613\/9181\/files\/kfd2-sr2-ex1.w.lb_1.jpg?v=1789090644","url":"https:\/\/www.maxwellplc.com\/ga\/products\/kfd2-sr3-ex2-2s-pepperl-fuchs-switch-amplifier","provider":"Maxwell PLC Ltd","version":"1.0","type":"link"}