{"product_id":"yokogawa-nfap135-s50-pulse-input-module","title":"Yokogawa NFAP135-S50 Pulse Input Module","description":"\u003ch3\u003e\u003cstrong\u003eOverview\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp\u003eThe\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003eNFAP135-S50\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eis an 8-channel isolated pulse input module developed by Yokogawa for use in CENTUM VP and ProSafe-RS control platforms. It is engineered to reliably capture high-speed pulse and contact signals from field devices while maintaining strong electrical isolation and signal integrity in electrically noisy environments.\u003c\/p\u003e\n\u003cp\u003eThis module supports both 2-wire and 3-wire pulse sources and can directly supply power to compatible transmitters, making it well suited for flow measurement, rotational speed detection, and frequency-based instrumentation.\u003c\/p\u003e\n\u003ch3\u003e\u003cstrong\u003eKey Functional Characteristics\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp\u003eThe\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003eNFAP135-S50\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eprovides eight fully independent pulse input channels, each electrically isolated from the others and from the system backplane. This architecture prevents signal interference, ground loops, and cross-channel noise, ensuring accurate pulse counting and frequency measurement.\u003c\/p\u003e\n\u003cp\u003eThe module accepts a wide range of industrial pulse formats, including dry contact signals, voltage pulses, and current pulses. High-frequency input capability allows it to handle fast-changing signals commonly produced by turbine flowmeters and speed sensors.\u003c\/p\u003e\n\u003ch3\u003e\u003cstrong\u003eSupported Input Signal Types\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp\u003eThe\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003eNFAP135-S50\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eaccommodates multiple field wiring configurations:\u003c\/p\u003e\n\u003cp\u003e2-wire inputs\u003cbr\u003eContact ON\/OFF signals\u003cbr\u003eVoltage pulse signals\u003cbr\u003eCurrent pulse signals\u003cbr\u003eBuilt-in transmitter power supply support\u003c\/p\u003e\n\u003cp\u003e3-wire inputs\u003cbr\u003eExternally powered voltage pulse transmitters\u003c\/p\u003e\n\u003cp\u003eThis flexibility allows direct connection to a broad range of field instruments without additional interface hardware.\u003c\/p\u003e\n\u003ch3\u003e\u003cstrong\u003ePerformance Specifications\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp\u003eThe module is designed for precise pulse acquisition across a wide operating range.\u003c\/p\u003e\n\u003cp\u003eInput frequency range\u003cbr\u003eUp to 10 kHz, depending on signal characteristics and system configuration\u003c\/p\u003e\n\u003cp\u003eChannel isolation\u003cbr\u003eElectrical isolation between all input channels\u003cbr\u003eIsolation between field inputs and system bus circuitry\u003c\/p\u003e\n\u003cp\u003eCounting and measurement functions\u003cbr\u003ePulse counting\u003cbr\u003eFrequency measurement\u003cbr\u003eTotalizing applications\u003c\/p\u003e\n\u003ch3\u003e\u003cstrong\u003eMechanical and Environmental Data\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp\u003eCompact construction allows efficient use of cabinet space while maintaining robustness for industrial environments.\u003c\/p\u003e\n\u003cp\u003eDimensions\u003cbr\u003e32.8 × 107.5 × 130 mm\u003c\/p\u003e\n\u003cp\u003eWeight\u003cbr\u003e0.3 kg\u003c\/p\u003e\n\u003ch3\u003e\u003cstrong\u003eTypical Application Scenarios\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp\u003eThe\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003eNFAP135-S50\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eis commonly deployed in process and factory automation systems where accurate pulse acquisition is critical.\u003c\/p\u003e\n\u003cp\u003eFlowmeters with pulse outputs\u003cbr\u003eTurbine and magnetic flow measurement\u003cbr\u003eMotor and shaft speed monitoring\u003cbr\u003eRotational encoders\u003cbr\u003eHigh-speed counters and totalizers\u003cbr\u003eFrequency-based instrumentation\u003c\/p\u003e\n\u003ch3\u003e\u003cstrong\u003eFAQ\u003c\/strong\u003e\u003c\/h3\u003e\n\u003ch3\u003e\u003cstrong\u003eWhat distinguishes the NFAP135-S50 from standard digital input modules?\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp\u003eUnlike standard DI modules, the\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003eNFAP135-S50\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003esupports high-frequency pulse signals and provides per-channel isolation, enabling accurate counting and frequency measurement without signal degradation.\u003c\/p\u003e\n\u003ch3\u003e\u003cstrong\u003eCan this module power field transmitters directly?\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp\u003eYes. For supported 2-wire pulse transmitters, the module can supply operating power, reducing the need for external power sources.\u003c\/p\u003e\n\u003ch3\u003e\u003cstrong\u003eIs the module suitable for safety-related systems?\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp\u003eThe\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003eNFAP135-S50\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eis compatible with Yokogawa safety and control platforms when used according to system design and certification requirements.\u003c\/p\u003e","brand":"Yokogawa","offers":[{"title":"Default Title","offer_id":42884279173210,"sku":"NFAP135-S50","price":264.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0612\/4601\/3530\/files\/NFAI135-S002.jpg?v=1770263829","url":"https:\/\/www.plcmasters.com\/id\/products\/yokogawa-nfap135-s50-pulse-input-module","provider":"PLC Masters Ltd.","version":"1.0","type":"link"}