{"product_id":"analog-input-output-module-yokogawa-nfai841-s50","title":"Analog Input Output Module | Yokogawa NFAI841-S50","description":"\u003ch2\u003eYokogawa NFAI841-S50 Analog I\/O Module\u003c\/h2\u003e\n\u003cp\u003eThe \u003cstrong\u003eYokogawa NFAI841-S50\u003c\/strong\u003e, also cataloged as the \u003cstrong\u003eNFAI841\u003c\/strong\u003e Analog I\/O Module, operates as a dedicated hardware component for simultaneous 4-20 mA DC input and output signal processing within CENTUM VP Distributed Control System platforms.\u003c\/p\u003e\n\u003ch3\u003eSuffix Breakdown \u0026amp; Model Matrix\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eNFAI841\u003c\/strong\u003e: Analog I\/O Module (4 to 20 mA, 8-channel input \/ 8-channel output)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e-S\u003c\/strong\u003e: Standard hardware type\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e5\u003c\/strong\u003e: Basic type with no intrinsic explosion protection\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e0\u003c\/strong\u003e: Basic type with standard conformal coating\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eHardware Specifications\u003c\/h3\u003e\n\u003cfigure class=\"table\"\u003e\n\u003ctable\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003e\u003cstrong\u003eParameter\u003c\/strong\u003e\u003c\/th\u003e\n\u003cth\u003e\u003cstrong\u003eSpecification\u003c\/strong\u003e\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\u003eNFAI841-S50\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBrand\u003c\/td\u003e\n\u003ctd\u003eYokogawa\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOrigin\u003c\/td\u003e\n\u003ctd\u003eJapan\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWeight\u003c\/td\u003e\n\u003ctd\u003e0.35 to 0.45 kg\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDimensions\u003c\/td\u003e\n\u003ctd\u003eStandard FIO single-slot width\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOperating Temp\u003c\/td\u003e\n\u003ctd\u003e-20 deg C to +70 deg C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePower Consumption\u003c\/td\u003e\n\u003ctd\u003e230 mA (5 V DC), 540 mA (24 V DC)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInput Channels\u003c\/td\u003e\n\u003ctd\u003e8 channels, non-isolated, 4-20 mA DC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOutput Channels\u003c\/td\u003e\n\u003ctd\u003e8 channels, non-isolated, 4-20 mA DC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAccuracy\u003c\/td\u003e\n\u003ctd\u003e+\/- 16 uA\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTemperature Drift\u003c\/td\u003e\n\u003ctd\u003e+\/- 16 uA per 10 deg C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eData Update Period\u003c\/td\u003e\n\u003ctd\u003e10 ms\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eIsolation\u003c\/td\u003e\n\u003ctd\u003e1500 V AC between I\/O channels and system backplane (1 min)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eEnvironmental Rating\u003c\/td\u003e\n\u003ctd\u003eISA G3 corrosion resistance\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/figure\u003e\n\u003ch3\u003eDCS Process Control \u0026amp; Instrumentation Attributes\u003c\/h3\u003e\n\u003cp\u003eThe NFAI841-S50 integrates 8 analog input channels and 8 analog output channels onto a single FIO card footprint. To preserve signal fidelity, the module utilizes internal multiplexing linked to a central analog-to-digital converter for inputs, and independent digital-to-analog converters for loop current outputs. While individual channels share a common negative return path (non-isolated design), a 1500 V AC galvanic isolation barrier separates the entire process-side circuitry from the sensitive backplane logic. This design shields the controller network from high common-mode field disturbances and electrical line noise.\u003c\/p\u003e\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003cp\u003eQ: How should power distribution be structured given that the channels are non-isolated?\u003c\/p\u003e\n\u003cp\u003eA: Because the 8 input and 8 output channels share a common internal ground line, you must ensure that all external field loops operate on the same potential. Avoid connecting transmitters powered from different non-isolated power grids to prevent ground loops.\u003c\/p\u003e\n\u003cp\u003eQ: Is this combined I\/O module compatible with dual-redundant deployment?\u003c\/p\u003e\n\u003cp\u003eA: Yes. The NFAI841-S50 supports dual-redundant installation slots. If a critical internal component fails, the system triggers a seamless switchover to the redundant module without disrupting active field loop output values.\u003c\/p\u003e\n\u003cp\u003eQ: Can this standard module connect directly to field transmitters in Zone 1 or Zone 2 hazardous areas?\u003c\/p\u003e\n\u003cp\u003eA: No. Suffix codes \"5\" and \"0\" denote a lack of internal explosion-proof protection. Any field signals routed from hazardous classification zones must pass through external intrinsic safety barriers or galvanic isolators before entering the module.\u003c\/p\u003e\n\u003ch3\u003eField Installation Guidelines\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eMounting Method:\u003c\/strong\u003e Insert the module vertically into the designated slot of the FIO node unit rack. Ensure the retaining levers lock securely to prevent communication disruption with the backplane bus.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCabling Integrity:\u003c\/strong\u003e Make field terminations using standard pressure clamp terminal blocks or dedicated KS1 interface cables. Securely torque terminal screws to minimize junction resistance on the 4-20 mA loops.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eGrounding Configuration:\u003c\/strong\u003e Connect the overall cable shields to the designated system cabinet instrument ground bar. Avoid multiple shield ground points to prevent circulating loop currents.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThermal Constraints:\u003c\/strong\u003e Maintain adequate cabinet ventilation. If ambient internal temperatures approach the upper 70 deg C operating threshold, arrange hardware configurations to space out modules and prevent thermal drift.\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Yokogawa","offers":[{"title":"Default Title","offer_id":43664966942810,"sku":"NFAI841-S50","price":99.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0710\/5957\/0778\/files\/558.jpg?v=1784172842","url":"https:\/\/www.spareoil.com\/ar\/products\/analog-input-output-module-yokogawa-nfai841-s50","provider":"SpareOil Automation","version":"1.0","type":"link"}