{"product_id":"yokogawa-nflr121-s00-serial-communication-module","title":"Yokogawa NFLR121-S00 Serial Communication Module","description":"\u003cp\u003eThe Yokogawa NFLR121-S00 is a two-port RS-422\/RS-485 serial communication module designed for Yokogawa FCN autonomous controllers in the STARDOM platform. It provides serial data exchange with external devices such as PLCs through multipoint communication connections. Each port supports communication speeds up to 115.2 kbps, with configurable serial transmission parameters for connecting different equipment.\u003c\/p\u003e\n\u003ch3\u003eCommunication Functions\u003c\/h3\u003e\n\u003cp\u003eThe NFLR121 provides two RS-422\/RS-485 communication ports for exchanging data between the FCN controller and external serial devices.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eInterface: RS-422\/RS-485, two ports.\u003c\/li\u003e\n\u003cli\u003eConnection method: Multipoint.\u003c\/li\u003e\n\u003cli\u003eCommunication speed: 300 bps to 115.2 kbps.\u003c\/li\u003e\n\u003cli\u003eTransmission code: ASCII or binary.\u003c\/li\u003e\n\u003cli\u003eCharacter length: 7 or 8 bits.\u003c\/li\u003e\n\u003cli\u003eStop bits: 1 or 2 bits.\u003c\/li\u003e\n\u003cli\u003eParity: None, even, or odd.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eThe module uses asynchronous start-stop synchronization. Its configurable transmission parameters allow the controller to communicate with devices using different serial communication settings.\u003c\/p\u003e\n\u003ch3\u003eWiring and Communication Conditions\u003c\/h3\u003e\n\u003cp\u003eBoth ports use terminal-block connections secured by M4 screws, with five terminals per port. The specified maximum transmission distance is 1,200 m total extended length. Two 120 ohm terminating resistors are supplied for the RS-422\/RS-485 communication connections.\u003c\/p\u003e\n\u003cp\u003eWhen using a two-wire RS-485 connection, communication is limited to half-duplex operation. Four-wire configurations can support full-duplex communication, subject to the connected equipment and communication configuration.\u003c\/p\u003e\n\u003ch3\u003eModel and Ordering Information\u003c\/h3\u003e\n\u003cp\u003eThe NFLR121-S00 ordering code identifies the standard-type, basic configuration without explosion protection. Yokogawa's model and suffix documentation distinguishes the explosion-protection and ISA Standard G3 options, so the complete suffix should be checked when selecting a replacement.\u003c\/p\u003e\n\u003ch3\u003eTechnical Specifications\u003c\/h3\u003e\n\u003cfigure\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\u003ctd\u003eModel\u003c\/td\u003e\n\u003ctd\u003eNFLR121-S00\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\u003eProduct Type\u003c\/td\u003e\n\u003ctd\u003eSerial Communication Module\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInterface\u003c\/td\u003e\n\u003ctd\u003eRS-422 \/ RS-485\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eNumber of Ports\u003c\/td\u003e\n\u003ctd\u003e2\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eConnection Type\u003c\/td\u003e\n\u003ctd\u003eMultipoint\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCommunication Speed\u003c\/td\u003e\n\u003ctd\u003e0.3 to 115.2 kbps\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSynchronization\u003c\/td\u003e\n\u003ctd\u003eStart-stop\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTransmission Code\u003c\/td\u003e\n\u003ctd\u003eASCII \/ Binary\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCharacter Length\u003c\/td\u003e\n\u003ctd\u003e7 \/ 8 bits\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eStop Bits\u003c\/td\u003e\n\u003ctd\u003e1 \/ 2 bits\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eParity\u003c\/td\u003e\n\u003ctd\u003eNone \/ Even \/ Odd\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMaximum Transmission Distance\u003c\/td\u003e\n\u003ctd\u003e1,200 m (total extended length)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eConnector\u003c\/td\u003e\n\u003ctd\u003eM4 screw terminal block, 5 terminals x 2\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTerminating Resistors\u003c\/td\u003e\n\u003ctd\u003e2 x 120 ohm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCurrent Consumption\u003c\/td\u003e\n\u003ctd\u003e500 mA at 5 VDC\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\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/figure\u003e\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003cp\u003eQ: What is the difference between NFLR121 and NFLR111?\u003c\/p\u003e\n\u003cp\u003eA: The NFLR121 provides two RS-422\/RS-485 ports for multipoint communication, whereas the NFLR111 provides two RS-232-C ports for point-to-point communication. The interface type and wiring requirements must match the connected equipment.\u003c\/p\u003e\n\u003cp\u003eQ: Can the NFLR121-S00 communicate with Modbus devices?\u003c\/p\u003e\n\u003cp\u003eA: Yes. Yokogawa documents an FCN application using the NFLR121 for Modbus RTU master and slave communication. The required port configuration and application logic must be implemented in the controller engineering environment.\u003c\/p\u003e\n\u003cp\u003eQ: Is the NFLR121 suitable for two-wire RS-485 communication?\u003c\/p\u003e\n\u003cp\u003eA: Yes. Two-wire RS-485 is supported, but operation is limited to half-duplex. Four-wire connections can be used where full-duplex communication is required.\u003c\/p\u003e","brand":"Yokogawa","offers":[{"title":"Default Title","offer_id":68893930029298,"sku":"NFLR121-S00","price":235.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0730\/5589\/5794\/files\/NFLR121-S002.jpg?v=1793952697","url":"https:\/\/www.petrospare.com\/products\/yokogawa-nflr121-s00-serial-communication-module","provider":"Petro Spare Industrial Limited","version":"1.0","type":"link"}