{"product_id":"pepperl-fuchs-kfd2-stc5-1-smart-transmitter-power-supply-isolated-barrier","title":"Pepperl+Fuchs KFD2-STC5-1 SMART Transmitter Power Supply Isolated Barrier","description":"\u003ch2 class=\"\"\u003eProduct Overview\u003c\/h2\u003e\n\u003cp\u003e\u003cspan class=\"\"\u003eThe Pepperl+Fuchs KFD2-STC5-1 acts as a high-performance isolated barrier within the renowned K-System,\u003c\/span\u003e\u003cspan class=\"\"\u003e\u003cspan\u003e \u003c\/span\u003especifically designed to power 2-wire and 3-wire SMART transmitters in hazardous areas.\u003c\/span\u003e\u003cspan class=\"\"\u003e\u003cspan\u003e \u003c\/span\u003eThis single-channel module ensures the integrity of critical process data by providing high-quality galvanic isolation between the field loops and the control system.\u003c\/span\u003e\u003cspan class=\"\"\u003e\u003cspan\u003e \u003c\/span\u003eBy supporting bi-directional communication via the HART protocol,\u003c\/span\u003e\u003cspan class=\"\"\u003e\u003cspan\u003e \u003c\/span\u003ethe KFD2-STC5-1 allows engineers to perform remote diagnostics and configuration without interrupting the 4 mA ...\u003c\/span\u003e\u003cspan class=\"\"\u003e\u003cspan\u003e \u003c\/span\u003e20 mA analog signal.\u003c\/span\u003e\u003cspan class=\"\"\u003e\u003cspan\u003e \u003c\/span\u003eThis unit plays a vital role in protecting expensive DCS and PLC inputs from unpredictable surges and ground loops,\u003c\/span\u003e\u003cspan class=\"\"\u003e\u003cspan\u003e \u003c\/span\u003emaking it an essential component for oil and gas,\u003c\/span\u003e\u003cspan class=\"\"\u003e\u003cspan\u003e \u003c\/span\u003echemical processing,\u003c\/span\u003e\u003cspan class=\"\"\u003e\u003cspan\u003e \u003c\/span\u003eand power generation facilities where signal precision is non-negotiable.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch2 class=\"\"\u003eCore Technical Advantages\u003c\/h2\u003e\n\u003cp\u003e\u003cspan class=\"\"\u003eThis module features a specialized transformer-based isolation architecture that provides robust galvanic separation between the input,\u003c\/span\u003e\u003cspan class=\"\"\u003e\u003cspan\u003e \u003c\/span\u003eoutput,\u003c\/span\u003e\u003cspan class=\"\"\u003e\u003cspan\u003e \u003c\/span\u003eand power supply.\u003c\/span\u003e\u003cspan class=\"\"\u003e\u003cspan\u003e \u003c\/span\u003eThe KFD2-STC5-1 delivers a stable 24V DC supply to field instrumentation while simultaneously transferring the analog measurement signal to the safe area with negligible linearity error.\u003c\/span\u003e\u003cspan class=\"\"\u003e\u003cspan\u003e \u003c\/span\u003eIts hardware design includes a dedicated terminal set for HART communicators,\u003c\/span\u003e\u003cspan class=\"\"\u003e\u003cspan\u003e \u003c\/span\u003eallowing for seamless integration of handheld devices or PC-based asset management software.\u003c\/span\u003e\u003cspan class=\"\"\u003e\u003cspan\u003e \u003c\/span\u003eThe unit also incorporates active current limiting and short-circuit protection,\u003c\/span\u003e\u003cspan class=\"\"\u003e\u003cspan\u003e \u003c\/span\u003epreventing localized field faults from cascading into systemic failures.\u003c\/span\u003e\u003cspan class=\"\"\u003e\u003cspan\u003e \u003c\/span\u003eFurthermore,\u003c\/span\u003e\u003cspan class=\"\"\u003e\u003cspan\u003e \u003c\/span\u003ethe housing utilizes a standard 35 mm DIN rail mount with Power Rail compatibility,\u003c\/span\u003e\u003cspan class=\"\"\u003e\u003cspan\u003e \u003c\/span\u003ewhich simplifies wiring by distributing power through the rail connectors rather than individual terminal blocks.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch2 class=\"\"\u003eTechnical Specifications\u003c\/h2\u003e\n\u003ctable\u003e\n\u003cthead\u003e\n\u003ctr class=\"firstRow\"\u003e\n\u003ctd\u003e\u003cstrong\u003eFeature\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003eSpecifications\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cstrong\u003eNumber of Channels\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e1-Channel (Isolated)\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cstrong\u003eInput Signal\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e4 ... 20 mA (supports 2-wire\/3-wire SMART)\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cstrong\u003eOutput Signal\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e4 ... 20 mA (Sink or Source)\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cstrong\u003eSupply Voltage\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e19 ... 30 V DC (via Power Rail or Terminals)\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cstrong\u003eIsolation Voltage\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e300 V AC (Galvanic Isolation)\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cstrong\u003eCommunication\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003eHART Bi-directional\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cstrong\u003eAccuracy\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e≤ 0.1% of Full Scale\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cstrong\u003eOperating Temperature\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e-20 °C to 60 °C (-4 °F to 140 °F)\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cstrong\u003eIP Rating\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003eIP20\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cstrong\u003eDimensions\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e20mm (W) x 115mm (H) x 119mm (D)\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cstrong\u003eApproximate Weight\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e150 g\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch2 class=\"\"\u003eInstallation Guide\u003c\/h2\u003e\n\u003cp\u003e\u003cspan class=\"\"\u003eEngineers must install the KFD2-STC5-1 vertically on a 35 mm DIN rail within a protected enclosure to ensure optimal heat dissipation.\u003c\/span\u003e\u003cspan class=\"\"\u003e\u003cspan\u003e \u003c\/span\u003eWhen wiring 2-wire transmitters,\u003c\/span\u003e\u003cspan class=\"\"\u003e\u003cspan\u003e \u003c\/span\u003econnect the positive lead to terminal 1 and the negative to terminal 3; for 3-wire configurations,\u003c\/span\u003e\u003cspan class=\"\"\u003e\u003cspan\u003e \u003c\/span\u003eutilize terminal 2 for the power feed.\u003c\/span\u003e\u003cspan class=\"\"\u003e\u003cspan\u003e \u003c\/span\u003eMaintain a minimum bending radius of 20mm for all signal cables to prevent conductor fatigue and signal attenuation.\u003c\/span\u003e\u003cspan class=\"\"\u003e\u003cspan\u003e \u003c\/span\u003eFor HART communication,\u003c\/span\u003e\u003cspan class=\"\"\u003e\u003cspan\u003e \u003c\/span\u003eensure that the loop resistance remains between 250 Ω and 1100 Ω to allow the digital frequency shift keying (FSK) signal to propagate correctly.\u003c\/span\u003e\u003cspan class=\"\"\u003e\u003cspan\u003e \u003c\/span\u003eIf installing multiple units,\u003c\/span\u003e\u003cspan class=\"\"\u003e\u003cspan\u003e \u003c\/span\u003eutilize the KFD2-EB2 Power Feed Module to streamline the power distribution across the Power Rail,\u003c\/span\u003e\u003cspan class=\"\"\u003e\u003cspan\u003e \u003c\/span\u003esignificantly reducing installation labor and potential wiring errors.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch2 class=\"\"\u003eEngineering Advantages\u003c\/h2\u003e\n\u003cp\u003e\u003cspan class=\"\"\u003eThe KFD2-STC5-1 excels in high-interference environments by filtering out electromagnetic noise that often plagues long-distance signal transmission in industrial plants.\u003c\/span\u003e\u003cspan class=\"\"\u003e\u003cspan\u003e \u003c\/span\u003eIts Sil 2 (IEC 61508) capability demonstrates its reliability for use in safety-instrumented systems where high availability is paramount.\u003c\/span\u003e\u003cspan class=\"\"\u003e\u003cspan\u003e \u003c\/span\u003eThe module’s compatibility with both 2-wire and 3-wire transmitters provides engineers with the flexibility to standardize on a single barrier model across diverse instrument types.\u003c\/span\u003e\u003cspan class=\"\"\u003e\u003cspan\u003e \u003c\/span\u003eBy decoupling the field environment from the control room,\u003c\/span\u003e\u003cspan class=\"\"\u003e\u003cspan\u003e \u003c\/span\u003ethis isolated barrier prevents ground loop currents from distorting sensor data,\u003c\/span\u003e\u003cspan class=\"\"\u003e\u003cspan\u003e \u003c\/span\u003eensuring that your process control logic operates on accurate,\u003c\/span\u003e\u003cspan class=\"\"\u003e\u003cspan\u003e \u003c\/span\u003ereal-time information.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch2 class=\"\"\u003eDelivery \u0026amp; Logistics\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong class=\"\"\u003eDelivery Time:\u003c\/strong\u003e\u003cspan class=\"\"\u003e\u003cspan\u003e \u003c\/span\u003e3-5 days once payment is finalized.\u003c\/span\u003e\u003cstrong class=\"\"\u003eShipping Carriers:\u003c\/strong\u003e\u003cspan class=\"\"\u003e\u003cspan\u003e \u003c\/span\u003eShipped via DHL,\u003c\/span\u003e\u003cspan class=\"\"\u003e\u003cspan\u003e \u003c\/span\u003eFEDEX,\u003c\/span\u003e\u003cspan class=\"\"\u003e\u003cspan\u003e \u003c\/span\u003eor UPS with full tracking and original factory sealing.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch2 class=\"\"\u003eTechnical FAQs\u003c\/h2\u003e\n\u003cp\u003e\u003cspan class=\"\"\u003eQ1:\u003c\/span\u003e\u003cspan class=\"\"\u003e\u003cspan\u003e \u003c\/span\u003eDoes the KFD2-STC5-1 support 3-wire transmitters with higher current consumption?\u003c\/span\u003e\u003cspan class=\"\"\u003eA1:\u003c\/span\u003e\u003cspan class=\"\"\u003e\u003cspan\u003e \u003c\/span\u003eYes,\u003c\/span\u003e\u003cspan class=\"\"\u003e\u003cspan\u003e \u003c\/span\u003ethis module provides a dedicated terminal for 3-wire power,\u003c\/span\u003e\u003cspan class=\"\"\u003e\u003cspan\u003e \u003c\/span\u003ethough you should verify that the transmitter's total current draw does not exceed the unit's maximum output capacity (typically around 25 mA).\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan class=\"\"\u003eQ2:\u003c\/span\u003e\u003cspan class=\"\"\u003e\u003cspan\u003e \u003c\/span\u003eCan I access HART data through the output terminals?\u003c\/span\u003e\u003cspan class=\"\"\u003eA2:\u003c\/span\u003e\u003cspan class=\"\"\u003e\u003cspan\u003e \u003c\/span\u003eAbsolutely.\u003c\/span\u003e\u003cspan\u003e The KFD2-STC5-1 is designed for HART transparency,\u003c\/span\u003e\u003cspan\u003e meaning the digital signal passes through the barrier without distortion,\u003c\/span\u003e\u003cspan\u003e allowing you to connect a HART modem at the control side terminals.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eQ3:\u003c\/span\u003e\u003cspan\u003e What is the benefit of using the Power Rail with this model?\u003c\/span\u003e\u003cspan\u003eA3:\u003c\/span\u003e\u003cspan\u003e The Power Rail eliminates the need for \"daisy-chaining\" 24V DC wires across every individual module.\u003c\/span\u003e\u003cspan\u003e It provides a centralized power bus,\u003c\/span\u003e\u003cspan\u003e reduces cabinet clutter,\u003c\/span\u003e\u003cspan\u003e and allows for hot-swapping modules without losing power to the rest of the rack.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eQ4:\u003c\/span\u003e\u003cspan\u003e How does the KFD2-STC5-1 handle a short circuit in the field?\u003c\/span\u003e\u003cspan\u003eA4:\u003c\/span\u003e\u003cspan\u003e The module incorporates internal current limiting.\u003c\/span\u003e\u003cspan\u003e In the event of a field-side short circuit,\u003c\/span\u003e\u003cspan\u003e the barrier limits the current to a safe level,\u003c\/span\u003e\u003cspan\u003e protecting the internal circuitry and preventing the fault from tripping the main power supply.\u003c\/span\u003e\u003c\/p\u003e","brand":"Pepperl + Fuchs","offers":[{"title":"Default Title","offer_id":45952724730029,"sku":"KFD2-STC5-1","price":199.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0733\/1613\/9181\/files\/KFD2-STC5-1_1.jpg?v=1777268975","url":"https:\/\/www.maxwellplc.com\/products\/pepperl-fuchs-kfd2-stc5-1-smart-transmitter-power-supply-isolated-barrier","provider":"Maxwell PLC Ltd","version":"1.0","type":"link"}