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NFLR121-S00 S1

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Yokogawa NFLR121-S00 S1 provides two isolated RS-422/RS-485 serial ports for data communication between industrial control equipment at speeds from 300 bps to 115.2 kbps.
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Technical specifications for NFLR121-S00 S1

  • Manufacturer:
    Yokogawa
  • Part Number:
    NFLR121-S00 S1
  • Product Family:
    Centum CS-Centum VP
  • Product Type:
    RS-422/RS-485 Communication Module
  • Stock:
    1
  • Port name / Number of Ports:
    Serial port (RS422/RS-485) x 2
  • Communication Speed:
    300 bps to 115.2 kbps
  • Isolation:
    Isolated
  • Connector:
    Terminal Block M4 screw (5 lines)
  • Cable:
    RS-422/RS-485 Communication cable
  • Commercial cable:
    Non (When it is connected to devices other than FA-M3 and YEWMAC, the cable must be made by the user.)
  • Notes of Wiring:
    Perform functional grounding on the FG line and shielding of cable in external equipment side.
  • Wiring cable:
    Shielded twisted pair cable (wire: AWG20 to 16)
  • Recommen ded cable:
    AKB161, AKB162
  • Weight:
    0.3 kg
  • Estimated shipping dimensions:
    3.2x14.1x13cm
  • Tariff Code:
    3401110090
  • Country of origin:
    Japan
  • Place of shipment:
    Xiamen, Fujian, China
By purchasing this item, you agree to the Terms & Conditions, ApterPower is not an authorized distributor for listed manufacturers or tradenames and therefore the manufacturer's warranty does not apply. All our products come with ApterPower's 1-year warranty.

More Information

Overview Manuals Specifications Control Application Scenarios Performance

Features:

  • Two electrically isolated ports supporting RS-422 and RS-485 communication.
  • Adjustable serial transmission from 300 bps to 115.2 kbps.
  • Flexible shielded twisted-pair wiring with external-side functional grounding.
Serial communication remains important when controllers must exchange data with instruments and automation devices that do not use Ethernet-based interfaces. Yokogawa NFLR121-S00 S1 adds two isolated communication channels to an industrial control configuration. Both RS-422 and RS-485 standards are supported, giving engineers flexibility when integrating compatible equipment. Adjustable communication speed allows the module to match slower legacy devices as well as faster serial networks. Two ports also permit separate communication paths without requiring two individual modules.

Reliable data transmission depends on suitable conductors and careful terminal work. Yokogawa NFLR121-S00 S1 accepts wiring through five-line M4 screw terminal blocks. Shielded twisted-pair cable helps protect communication signals from electrical interference in industrial environments. AWG20 to AWG16 conductors are permitted, while AKB161 and AKB162 provide recommended cable options. Custom cable preparation supports connections to equipment outside the FA-M3 and YEWMAC ranges.

Grounding arrangements can directly affect the stability of an RS-422 or RS-485 network. Yokogawa NFLR121-S00 S1 requires the FG connection and cable shield termination to be completed at the external equipment side. The cable shield must not terminate at the module FG connection. Conduit wiring provides additional routing and physical protection for the communication cable. Compliance with regional grounding standards supports safer installation and more consistent serial communication performance.

The NFLR121-S00 S1 Yokogawa RS-422/RS-485 Communication Module may still be available for purchase and support from Apter Power beyond End-Of-Life (EOL) by the manufacturer (OEM).
Yokogawa NFLR121-S00 S1 RS-422/RS-485 Communication Module Manuals,Datasheets,Link Important Notice: Other accessories, manuals, cables, calibration data, software, etc. are not included with this equipment unless listed in the above stock item description. All prices are shown in USD.
Yokogawa NFLR121-S00 S1 RS-422/RS-485 Communication Module Specs

General

  • Manufacturer Yokogawa
  • Model NFLR121-S00 S1
  • Condition New Original ready stock
  • Product Family NFDV561-P00 S2,NFBU200-S10 S1,NFAR181-S00 S2
Important Notice: Other accessories, manuals, cables, calibration data, software, etc. are not included with this equipment unless listed in the above stock item description. All prices are shown in USD.
  • Protocol Configuration: Supports flexible software and hardware configuration for Modbus RTU and custom serial protocols.
  • Flow Control: Features automatic data flow control technology to eliminate bus collisions.
  • Topology Management: Provides master-slave multi-point network management and multi-node polling control mechanisms.
  • Collision Detection: Built-in hardware-level frame error and parity check data link control.
  • Motor Drive: Connects to the factory's frequency converter (VFD) for real-time speed control and monitoring.
  • Power Meters: Integrates a multi-functional power meter to collect data such as grid voltage and current.
  • Water Quality Monitoring: Connects to a multi-parameter analyzer to transmit on-site pH and turbidity indicators.
  • Intelligent Peripherals: Interlocks with barcode scanners or weighing sensors, and other factory automation hardware.
  • Rate Range: Supports wide-range transmission from 1200 bps to 115.2 kbps.
  • Transmission Distance: Maximum communication distance up to 1200 meters over standard twisted-pair cable.
  • Isolation Protection: Provides electrical isolation up to 1.5 kV to withstand industrial ground potential differences.
  • Node Capacity: Up to 32 standard serial field devices can be connected to a single bus loop.
Description
Industrial devices requiring serial data exchange can connect through Yokogawa NFLR121-S00 S1. Two isolated ports support both RS-422 and RS-485 communication, allowing separate external equipment connections within one module. Communication speeds can be configured from 300 bps to 115.2 kbps to match different device and network requirements. The isolated port structure helps maintain electrical separation between communication circuits.

Each serial interface on Yokogawa NFLR121-S00 S1 uses an M4 screw terminal block with five connection lines. Shielded twisted-pair cable from AWG20 to AWG16 is specified for field wiring. AKB161 and AKB162 are the recommended communication cables for supported installations. Conduit wiring is required for cables connected to NFLR121, as well as NFDV151, NFDV551, NFLR111, and NFLF111.

Commercially prepared cables are not specified for Yokogawa NFLR121-S00 S1 when communication involves equipment other than FA-M3 and YEWMAC devices. A suitable RS-422/RS-485 communication cable must therefore be made by the user for other external equipment. Cable construction, terminal assignment, and communication parameters should match the connected device. Proper wiring helps maintain dependable data transfer across the selected baud rate.

Functional grounding for Yokogawa NFLR121-S00 S1 must be completed on the connected external equipment side. The cable shield between the module and external equipment must connect to the FG terminal of the external device rather than the FG terminal on the module. Grounding practice must comply with the applicable national or regional grounding system. NFLR121 was added to the supported I/O module range together with NFLR111, NFAI143, and NFAI543.
Alternative Names
NFLRI2I-S00 SI NFLR121-SOO S1 NFLR121S00 S1 NFDV561-P00 S2 NFBU200-S10 S1 NFAR181-S50 S2 NFAR181-S00 S2 NFAP135-S00 S2
Technical notes
Maximize your network reach with the Yokogawa NFLR121-S00 S1 communication module, delivering robust RS-422/RS-485 serial connectivity across distances up to 1200 meters. This high-reliability component seamlessly bridges field devices with your central control architecture.
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FAQS

The following is a list of questions commonly asked by our customers. Please contact us if you have a question about our process that is not answered below.
What communication interfaces does Yokogawa NFLR121-S00 S1 support?
Yokogawa NFLR121-S00 S1 supports both RS-422 and RS-485 serial communication through two ports.
How fast can Yokogawa NFLR121-S00 S1 transfer serial data?
Available communication speeds range from 300 bps to 115.2 kbps.
Can Yokogawa NFLR121-S00 S1 connect to two external devices?
Yes. Two independent RS-422/RS-485 serial ports are available for compatible external equipment.
Does Yokogawa NFLR121-S00 S1 use a removable communication connector?
The specified connection interface is an M4 screw terminal block with five wiring lines.

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