{"product_id":"communication-module-rs-485-fcn-controller-yokogawa-nflr121-s50","title":"Communication Module RS-485 FCN Controller Yokogawa NFLR121-S50","description":"\u003ch2\u003eYokogawa NFLR121-S50 Serial Communication Module\u003c\/h2\u003e\n\u003cp\u003eThe \u003cstrong\u003eYokogawa NFLR121-S50\u003c\/strong\u003e, also cataloged as the \u003cstrong\u003eNFLR121-S50\u003c\/strong\u003e Serial Communication Module, operates as a dedicated hardware component for multipoint data exchange within STARDOM FCN and CENTUM VP platforms.\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\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\u003eNFLR121-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\u003e0.3 kg\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDimensions\u003c\/td\u003e\n\u003ctd\u003e130 mm x 142.9 mm x 32.8 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOperating Temp\u003c\/td\u003e\n\u003ctd\u003e0 deg C to 55 deg C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePower Consumption\u003c\/td\u003e\n\u003ctd\u003e~4.5 W (24 V DC)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePorts\u003c\/td\u003e\n\u003ctd\u003e2 x RS-422\/RS-485 (Isolated)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBaud Rate\u003c\/td\u003e\n\u003ctd\u003e0.3 kbps to 115.2 kbps\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/figure\u003e\n\u003ch3\u003eSerial Communication and Network Integrity\u003c\/h3\u003e\n\u003cp\u003eThe \u003cstrong\u003eNFLR121-S50\u003c\/strong\u003e provides deterministic data exchange by utilizing fully isolated RS-422\/RS-485 interfaces. This architecture suppresses common-mode noise and ground loop potentials often encountered when interconnecting disparate field devices or legacy PLCs over extended cable runs. The module supports both half-duplex and full-duplex transmission modes, allowing for flexible configuration based on the specific requirements of the connected serial instrumentation. Data integrity is managed through hardware-level parity and cyclic redundancy check (CRC) algorithms, which monitor incoming frames for bit errors or synchronization failures before passing the payload to the FCN autonomous controller backplane.\u003c\/p\u003e\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003cp\u003eQ: Does the module support hot-swapping during active system operation?\u003c\/p\u003e\n\u003cp\u003eA: The hardware is designed for insertion into the FCN backplane; however, refer to the specific STARDOM system documentation regarding I\/O module hot-swap protocols and firmware compatibility before performing maintenance.\u003c\/p\u003e\n\u003cp\u003eQ: Can both RS-422\/RS-485 ports operate at different baud rates simultaneously?\u003c\/p\u003e\n\u003cp\u003eA: Yes, each of the two ports is independently configurable. Users may assign distinct baud rates, parity, and stop-bit parameters to each port via the system engineering software.\u003c\/p\u003e\n\u003cp\u003eQ: How should the termination resistance be handled for long-distance RS-485 cabling?\u003c\/p\u003e\n\u003cp\u003eA: For cable lengths approaching the 1200 m limit, ensure that 120-ohm termination resistors are installed at both ends of the physical segment to prevent signal reflections and data corruption.\u003c\/p\u003e\n\u003ch3\u003eField Installation Guidelines\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eMounting and Bonding\u003c\/strong\u003e: Secure the module to the DIN rail or chassis. Ensure the module chassis ground point is bonded to the cabinet earthing system to maintain effective isolation between the isolated communication ports and the system backplane.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCabling Constraints\u003c\/strong\u003e: Use shielded, twisted-pair cabling for all serial connections. Route communication cables through separate conduits or trays dedicated to data signals to mitigate electromagnetic interference from high-voltage AC lines.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTermination Procedures\u003c\/strong\u003e: When configuring multi-drop networks, maintain polarity consistency (A to A, B to B). Terminate unused wires within the shielded cable to a single common reference point at the controller end to prevent capacitive coupling.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEnvironmental Monitoring\u003c\/strong\u003e: The module dissipates approximately 4.5 W of heat. Maintain standard clearance requirements around the FCN chassis to ensure airflow is not restricted, especially in cabinets nearing the 55 deg C operating limit.\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Yokogawa","offers":[{"title":"Default Title","offer_id":43585414955098,"sku":"NFLR121-S50","price":99.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0710\/5957\/0778\/files\/184.1_f62720ec-a845-4ca4-a7ff-8a7b91041ea2.jpg?v=1783048596","url":"https:\/\/www.spareoil.com\/es\/products\/communication-module-rs-485-fcn-controller-yokogawa-nflr121-s50","provider":"SpareOil Automation","version":"1.0","type":"link"}