{"product_id":"kfd2-stc4-ex2-pepperl-fuchs-smart-transmitter-power-supply-barrier","title":"KFD2-STC4-Ex2 Pepperl+Fuchs SMART Transmitter Power Supply Barrier","description":"\u003ch3\u003eEngineering Overview: High-Precision Signal Isolation\u003c\/h3\u003e\n\u003cp\u003eThe \u003cstrong\u003e\u003cspan style=\"color: #e67e22;\"\u003eKFD2-STC4-Ex2\u003c\/span\u003e\u003c\/strong\u003e by \u003cstrong\u003ePepperl+Fuchs\u003c\/strong\u003e is a dual-channel, galvanically isolated barrier specifically engineered for the reliable power supply and signal processing of 2-wire SMART transmitters. This module serves as a critical interface between field instrumentation and control systems, ensuring precise 0\/4–20 mA loop transmission while maintaining stringent intrinsic safety standards. With a bandwidth reaching 7.5 kHz and a settling time of 200 µs, the \u003cstrong\u003e\u003cspan style=\"color: #e67e22;\"\u003eKFD2-STC4-Ex2\u003c\/span\u003e\u003c\/strong\u003e ensures rapid, transparent communication for HART-compatible field devices.\u003c\/p\u003e\n\n\u003ch3\u003ePerformance \u0026amp; Technical Specifications\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eModel:\u003c\/strong\u003e \u003cstrong\u003e\u003cspan style=\"color: #e67e22;\"\u003eKFD2-STC4-Ex2\u003c\/span\u003e\u003c\/strong\u003e\n\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eChannels:\u003c\/strong\u003e 2-channel isolated barrier\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSupply Voltage:\u003c\/strong\u003e 20 to 35 V DC\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eInput Signal:\u003c\/strong\u003e 0\/4 to 20 mA (for 2-wire SMART transmitters)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eOutput Signal:\u003c\/strong\u003e 0\/4 to 20 mA\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eLoad Impedance:\u003c\/strong\u003e 0 to 550 Ω @ 20 mA\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eAccuracy:\u003c\/strong\u003e ≤ 10 µA (incl. calibration and linearity)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eTemperature Drift:\u003c\/strong\u003e 0.25 µA\/K\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMounting:\u003c\/strong\u003e 35 mm DIN rail (EN 60715)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSafety Integrity:\u003c\/strong\u003e SIL 2 per IEC\/EN 61508\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDimensions:\u003c\/strong\u003e 20 x 124 x 115 mm (housing type B2)\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eGlobal PLC Spare HUB’s Insight\u003c\/h3\u003e\n\u003cp\u003eThe \u003cstrong\u003e\u003cspan style=\"color: #e67e22;\"\u003eKFD2-STC4-Ex2\u003c\/span\u003e\u003c\/strong\u003e is a workhorse in hazardous area instrumentation. Unlike general-purpose isolators, this unit is perfectly tuned for the bidirectional digital communication required by HART protocols. In our experience, this module is the go-to solution for petrochemical and offshore applications where reliable diagnostic loop data is as critical as the process variable itself. Its compact B2 housing allows for high-density DIN rail packing without sacrificing thermal dissipation.\u003c\/p\u003e\n\n\u003ch3\u003eHazardous Area Approvals \u0026amp; Diagnostics\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eIntrinsic Safety:\u003c\/strong\u003e [Ex ia Ga] IIC, [Ex ia Da] IIIC, [Ex ia Ma] I\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eHazardous Ratings:\u003c\/strong\u003e ATEX, IECEx, and UL\/cULus approved for explosive atmospheres.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDiagnostic Capabilities:\u003c\/strong\u003e Integrated LED status indicators provide immediate visual confirmation of channel health. The design includes front-access test points, allowing technicians to verify loop current without breaking the field wiring—a critical feature for proactive maintenance in live systems.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eLogistics, Warranty, and Support\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eShipping:\u003c\/strong\u003e Expedited global transit via FedEx, UPS, and DHL.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eTurnaround:\u003c\/strong\u003e Orders dispatched within 24–48 hours.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWarranty:\u003c\/strong\u003e Professional 12-month quality assurance guarantee.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eExpert Frequently Asked Questions\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eHow does the 200 µs settling time impact my control loop performance?\u003c\/strong\u003e\u003cbr\u003e\nThe rapid settling time ensures minimal phase lag in your control signal, which is essential for high-speed PID loops where even minor delays could induce oscillations in process variables.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eCan I use this barrier with non-SMART transmitters?\u003c\/strong\u003e\u003cbr\u003e\nYes, the unit is fully backward compatible with standard 2-wire 4–20 mA transmitters, though it is optimized specifically to pass the digital overlays used by SMART devices.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eIs the 16 V minimum available voltage sufficient for my sensor?\u003c\/strong\u003e\u003cbr\u003e\nFor most standard SMART transmitters, 16 V at 20 mA provides ample power to maintain operation even with significant cable resistance, but verify your transmitter's minimum startup voltage during the design phase.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhat is the best way to leverage the front test points for troubleshooting?\u003c\/strong\u003e\u003cbr\u003e\nConnect a high-impedance multimeter to the test points to measure the loop current during commissioning. This allows you to calibrate the PLC input without having to disconnect the transmitter and lose your safety interlocks.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eHow does the Ex nA rating influence my cabinet design?\u003c\/strong\u003e\u003cbr\u003e\nThis rating allows the barrier to be installed in Division 2\/Zone 2 non-hazardous enclosures while the field wiring extends into Division 1\/Zone 0 hazardous areas, greatly simplifying total installation complexity.\u003c\/p\u003e","brand":"Pepperl+Fuchs","offers":[{"title":"Default Title","offer_id":45144142315702,"sku":"KFD2-STC4-Ex2","price":103.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0722\/7863\/8774\/files\/KFD2-STC4-EX2.jpg?v=1779868860","url":"https:\/\/www.plcsparehub.com\/products\/kfd2-stc4-ex2-pepperl-fuchs-smart-transmitter-power-supply-barrier","provider":"Global PLC Spare Hub","version":"1.0","type":"link"}