NFLR121-S00 Yokogawa Serial Module | New & Original Stock

Communication Module | Yokogawa NFLR121-S00 Serial

Communication Module | Yokogawa NFLR121-S00 Serial

Availability: 99 left in stock

Yokogawa NFLR121-S00 RS-422/RS-485 Communication Module The Yokogawa NFLR121-S00, also cataloged as the Yokogawa NFLR121 RS-422/RS-485 Communication Module, operates as a...

SKU: NFLC121-S00

Manufacturer: Yokogawa
Product No.: NFLC121-S00
Product Type: Communication Interface Modules
Product Origin: JAPAN
Payment:T/T, Western Union
Weight: 110g
Shipping port: Xiamen
Warranty: 12 months

Description Reviews

Yokogawa NFLR121-S00 RS-422/RS-485 Communication Module

The Yokogawa NFLR121-S00, also cataloged as the Yokogawa NFLR121 RS-422/RS-485 Communication Module, operates as a dedicated hardware component for serial data transmission and subsystem interfacing within distributed control system platforms. The module executes physical layer matching and serial protocol translation over dual isolated ports, enabling direct asynchronous multipoint communication between host controllers and legacy field devices.

Suffix Breakdown & Model Matrix

NFLR121: Base model identification for the 2-port RS-422/RS-485 Serial Communication Module.
-S: Standard hardware type designation with no specialized explosion protection options.
0: Basic implementation design specification code.
0: Style category iteration tracking number.

Hardware Specifications

Parameter	Specification
Model	NFLR121-S00
Brand	Yokogawa
Origin	Japan
Weight	0.11kg
Dimensions	2.2 cm x 12.4 cm x 12.6 cm
Operating Temp	-20 to 60 deg C
Storage Temp	-40 to 75 deg C
Humidity	20 to 90% RH (non-condensing)
Power Supply	5 VDC plus/minus 5% (from backplane bus)
Current Consumption	500 mA
Serial Interfaces	2 x RS-422/RS-485 ports
Transmission Topology	Multipoint configuration
Communication Mode	Half-duplex / Full-duplex selection
Synchronization Method	Start-stop asynchronous synchronization
Data Transfer Speed	300 bps to 115.2 kbps
Transmission Distance	Maximum 1200 m (dependent on baud rate and wire gauge)
Transmission Code	ASCII / Binary format support
Framing Configurations	Character length: 7/8 bits; Stop bits: 1/2 bits; Parity: None/even/odd

Distributed Control System Bus Routing & Signal Isolation

The module architecture implements internal electrical isolation logic between the primary backplane bus and the dual serial communication interfaces. These isolation boundaries mitigate common-mode noise issues and shield internal processing electronics from field-side electrical surges. The physical serial loops operate concurrently with standard 4-20 mA HART loop protocol instruments across the same automation nodes, passing data arrays into system registers without introducing transmission jitter or disrupting deterministic CPU bus cycles.

Frequently Asked Questions

Q: How are termination resistors configured for long-distance RS-485 multipoint wiring?

A: The physical installation requires setting internal jumpers or mounting external 120 ohm resistors across the positive and negative signal pairs at the final physical node of the 1200 m segment to suppress line reflections.

Q: Can the physical ports be assigned different transmission parameters simultaneously?

A: The independent internal interface circuitry allows each of the two serial channels to be provisioned with distinct baud rate, parity, and framing metrics within the system configuration tools.

Q: What indication marks a communication error detected by the module firmware?

A: The hardware monitors frame execution, updating dedicated internal status registers with parity, overrun, or framing error bits that are read continuously by the central processor unit diagnostics.

Field Installation Guidelines

Insertion Protocol: Slide the unit straight along the designated slot guides of the backplane rack until the bus connectors mesh fully. Tighten the grounding retention fasteners to ensure robust chassis bonding and resistance to structural vibration.
Signal Cable Routing: Run all serial communication cables in dedicated low-voltage wireways isolated from high-voltage motor control and switching lines. Utilize twisted-pair shielded instrumentation cables to minimize ambient electromagnetic interference.
Shielding and Earth Reference: Terminate the overall cable shield braid at a single point to the cabinet copper instrumentation clean ground bar. Ensure the grounding system exhibits resistance parameters under 1 ohm to ground for effective transient dissipation.

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