Product Overview

The Yokogawa NFLR121-S00 S1 is a high-performance Serial Communication Module designed for integration within the CENTUM VP and CS 3000 Distributed Control Systems (DCS). This module functions as a versatile gateway, enabling the controller to interface with a wide array of third-party field devices, including PLCs, power meters, and motor drives. Equipped with two independent serial ports, it facilitates seamless data exchange through standardized industrial protocols. By bridging the gap between the DCS backplane and field-level serial networks, the NFLR121-S00 S1 ensures that diagnostic and process data are accurately captured and synchronized across the automation architecture.

Technical Characteristics

The NFLR121-S00 S1 is engineered to provide stable, long-distance communication in electrically noisy industrial environments.

Multipoint Connectivity and Range The module features dual ports that support both RS-422 and RS-485 physical layers. This allows for multi-drop configurations where a single module can communicate with multiple devices over a distance of up to 1200 meters. Users can toggle between half-duplex and full-duplex modes to match the specific wiring requirements of the connected field hardware.

Configurable Data Protocols Designed for maximum flexibility, the NFLR121-S00 S1 utilizes start-stop synchronization. It supports a variety of data formats, including ASCII and binary, with user-definable character lengths (7 or 8 bits), stop bits (1 or 2), and comprehensive parity options (none, even, or odd). This granular control ensures compatibility with a broad spectrum of legacy and modern serial equipment.

Industrial Efficiency and Reliability With a low current consumption of only 500 mA, the module is optimized for high-density cabinet installations where thermal management is a priority. The rugged construction is specifically designed to meet Yokogawa’s stringent industrial standards, providing a reliable communication link for mission-critical process control strategies.

Technical Specifications

• Brand: Yokogawa

• Model Number: NFLR121-S00 S1

• Product Type: Serial Communication Module

• Interface: 2 x RS-422 / RS-485 Ports

• Communication Distance: Maximum 1200 Meters

• Data Transfer Rate: Configurable (per protocol requirements)

• Mode: Full-duplex or Half-duplex

• Protocol Support: ASCII, Binary (Start-stop synchronization)

• Power Consumption: 500 mA at 5V DC

• Weight: 0.3 kg

• Dimensions: 3.2 x 14.1 x 13.0 cm

• Origin: Japan

Application Areas

The Yokogawa NFLR121-S00 S1 is frequently deployed in process industries that require the integration of diverse subsystems into a centralized DCS environment:

• Oil and Gas: Interfacing with flow computers and tank gauging systems.

• Power Generation: Communicating with Intelligent Electronic Devices (IEDs) and protection relays.

• Manufacturing: Collecting data from specialized variable frequency drives (VFDs) and local PLC racks.

• Water Management: Integrating remote telemetry units (RTUs) across expansive facilities.