{"product_id":"f3lc51-2n-fa-m3-yokogawa-ut-link-communication-module","title":"F3LC51-2N FA-M3 Yokogawa  UT Link Communication Module","description":"\u003ch2\u003eYokogawa F3LC51-2N Communication Module\u003c\/h2\u003e\n\u003cp\u003eThe \u003cstrong\u003eYokogawa F3LC51-2N\u003c\/strong\u003e, also cataloged as the \u003cstrong\u003eF3LC51\u003c\/strong\u003e UT Link Communication Module, operates as a dedicated hardware component for field instrument data exchange and RS-422\/RS-485 serial integration within Yokogawa FA-M3 PLC 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\u003eF3LC51-2N\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\u003e0.15 kg\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDimensions\u003c\/td\u003e\n\u003ctd\u003e28.9 x 100 x 83.2 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOperating Temp\u003c\/td\u003e\n\u003ctd\u003e0 to +55 deg C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePower Consumption\u003c\/td\u003e\n\u003ctd\u003e290 mA (draws from 5 VDC backplane supply)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInterface Standards\u003c\/td\u003e\n\u003ctd\u003eEIA RS-422-A \/ RS-485\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTransmission Speed\u003c\/td\u003e\n\u003ctd\u003e300 to 38400 bps (selectable)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eNetwork Topology\u003c\/td\u003e\n\u003ctd\u003eHalf-duplex, 2-wire or 4-wire multidrop\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMax Distance\u003c\/td\u003e\n\u003ctd\u003e1200 m (via shielded twisted-pair AWG20-16)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMax Connected Nodes\u003c\/td\u003e\n\u003ctd\u003eUp to 32 stations\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTerminating Resistor\u003c\/td\u003e\n\u003ctd\u003eBuilt-in 220 ohm (dip switch selectable)\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; Serial Loop Protocols\u003c\/h3\u003e\n\u003cp\u003eThe F3LC51-2N interface board coordinates continuous cyclic polling over half-duplex RS-422\/RS-485 serial physical layers, offloading protocol parsing entirely from the central PLC processor. Designed to stream continuous variable registers from process temperature controllers and digital field transmitters, the module executes automatic background memory mapping into internal sequence buffers. Built-in optocoupler barriers establish galvanically isolated channel-to-channel isolation between the external field wiring bus and the internal backplane bus. Furthermore, onboard dip switches activate internal 220 ohm line termination resistors to suppress high-frequency signal reflections across long-distance multidrop networks.\u003c\/p\u003e\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003cp\u003eQ: Does installing the F3LC51-2N require custom communication ladder logic program blocks to read field registers?\u003c\/p\u003e\n\u003cp\u003eA: No, the hardware automatically maps serial frame registers directly into designated CPU memory locations through continuous background hardware polling routines.\u003c\/p\u003e\n\u003cp\u003eQ: How is line termination configured when the F3LC51-2N acts as the physical end node on an RS-485 bus?\u003c\/p\u003e\n\u003cp\u003eA: Technicians toggle the onboard DIP switch to engage the integrated 220 ohm terminating resistor without attaching external discrete resistors across the screw terminals.\u003c\/p\u003e\n\u003cp\u003eQ: What happens to the backplane power rail if a short circuit occurs on the external RS-422\/RS-485 signal line?\u003c\/p\u003e\n\u003cp\u003eA: Integrated optical isolation barriers decouple the external field communication loop from the backplane bus, preventing field circuit faults from damaging internal PLC rack electronics.\u003c\/p\u003e\n\u003ch3\u003eField Installation Guidelines\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eInsert the card vertically into the designated FA-M3 base module slot until the top latch engages the locking mechanism with a click.\u003c\/li\u003e\n\u003cli\u003eStrip shielded twisted-pair signal cables (AWG20-16) and secure conductors to the 6-point M3.5 terminal block using a tightening torque of 0.8 Nm.\u003c\/li\u003e\n\u003cli\u003eGround the cable shield drain wire at a single point on the main protective earth terminal bar inside the control enclosure.\u003c\/li\u003e\n\u003cli\u003eMaintain a minimum physical spacing of 100 mm between the RS-422\/RS-485 signal cables and high-voltage AC power distribution wiring in cabinet wire ducts.\u003c\/li\u003e\n\u003cli\u003eVerify that total end-to-end cable run distance across all connected multidrop nodes does not exceed 1200 m.\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Yokogawa","offers":[{"title":"Default Title","offer_id":43882007593050,"sku":"F3LC51-2N","price":99.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0710\/5957\/0778\/files\/617.1_5de93bb4-8143-425c-a4b4-22c6f61dee3b.jpg?v=1787281019","url":"https:\/\/www.spareoil.com\/products\/f3lc51-2n-fa-m3-yokogawa-ut-link-communication-module","provider":"SpareOil Automation","version":"1.0","type":"link"}