{"product_id":"nfaf135-s50-yokogawa-frequency-input-module","title":"NFAF135-S50 Yokogawa Frequency Input Module","description":"\u003ch2\u003eYokogawa NFAF135-S50 Frequency Input Module\u003c\/h2\u003e\n\u003cp\u003eThe \u003cstrong\u003eYokogawa NFAF135-S50\u003c\/strong\u003e, also cataloged as the \u003cstrong\u003eNFAF135\u003c\/strong\u003e frequency input module, serves as the primary frequency‑measurement hardware used to execute pulse and frequency acquisition across Yokogawa control platforms. It provides conditioned electrical input handling for turbine, speed, and pulse‑train monitoring circuits.\u003c\/p\u003e\n\u003ch3\u003eHardware Specifications\u003c\/h3\u003e\n\u003cfigure class=\"table\"\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\u003cth\u003e\u003cstrong\u003eModel\u003c\/strong\u003e\u003c\/th\u003e\n\u003ctd\u003eNFAF135-S50\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003e\u003cstrong\u003eBrand\u003c\/strong\u003e\u003c\/th\u003e\n\u003ctd\u003eYokogawa\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eOrigin\u003c\/th\u003e\n\u003ctd\u003eNot specified\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eWeight\u003c\/th\u003e\n\u003ctd\u003eNot specified\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eDimensions\u003c\/th\u003e\n\u003ctd\u003eNot specified\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eOperating Temp\u003c\/th\u003e\n\u003ctd\u003eNot specified\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003ePower Consumption\u003c\/th\u003e\n\u003ctd\u003eRack‑powered module; frequency signal conditioning\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eModule Type\u003c\/th\u003e\n\u003ctd\u003eFrequency Input Module\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eInput Type\u003c\/th\u003e\n\u003ctd\u003ePulse \/ frequency signals (module‑specific ranges not provided)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eConnector Type\u003c\/th\u003e\n\u003ctd\u003eTerminal‑board interface (model‑dependent)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eCore Performance\u003c\/th\u003e\n\u003ctd\u003eFrequency acquisition for turbine and rotating‑equipment monitoring loops\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/figure\u003e\n\u003ch3\u003eChannel-to-Channel Isolation and Mixed‑Signal Stability\u003c\/h3\u003e\n\u003cp\u003eYokogawa frequency modules maintain channel‑to‑channel isolation to prevent pulse‑train interference when installed near 4‑20 mA HART loops or Fieldbus PA segments. Internal PCB routing and isolation geometry reduce impedance coupling, ensuring deterministic frequency counting even when analog and digital signals coexist within the same node unit. Cold junction compensation is not applicable to frequency modules, but isolation behavior ensures stable operation in mixed‑signal cabinets.\u003c\/p\u003e\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eQ: Can the NFAF135-S50 be removed while the node unit is energized?\u003c\/strong\u003e A: Removal under power is not recommended. De‑energize the node or segment to avoid transient faults on connected pulse channels.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: Does the module impose additional backplane current load?\u003c\/strong\u003e A: It draws standard power for signal conditioning. No abnormal backplane loading occurs beyond typical Yokogawa frequency modules.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: How does the module behave in redundant frequency‑monitoring configurations?\u003c\/strong\u003e A: Redundancy is managed by the controller. The module provides continuous raw frequency input without internal buffering or switchover logic.\u003c\/p\u003e\n\u003ch3\u003eField Installation Guidelines\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eUse shielded twisted‑pair or coaxial wiring depending on the pulse‑source characteristics.\u003c\/li\u003e\n\u003cli\u003eBond cable shields at the cabinet end only to prevent ground‑loop formation.\u003c\/li\u003e\n\u003cli\u003eMaintain separation from high‑voltage conductors to reduce induced noise on pulse lines.\u003c\/li\u003e\n\u003cli\u003eVerify terminal torque to ensure stable contact for high‑frequency pulse signals.\u003c\/li\u003e\n\u003cli\u003eAvoid sharp bends or mechanical strain on wiring to prevent signal distortion.\u003c\/li\u003e\n\u003cli\u003eConfirm correct polarity and wiring orientation before energizing the frequency source.\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Yokogawa","offers":[{"title":"Default Title","offer_id":48231705182398,"sku":"NFAF135-S50","price":3000.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0725\/1145\/5422\/files\/screenshot_2026-06-15_17-52-24.png?v=1781518108","url":"https:\/\/www.autooiltech.com\/ar\/products\/nfaf135-s50-yokogawa-frequency-input-module","provider":"AutoOilTech Limited","version":"1.0","type":"link"}