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Yokogawa ALR121-S50 Serial Communication Module

في الأوراق المالية!
  • Part Number: ALR121-S50
  • Brand: Yokogawa
  • Type: Communication Module
  • Dimensions: 3.3x10.7x13cm
  • Country of Origin: Japan
  • Barcode: 8537101190

Additional Specifications

Color / Pattern
  • Brown
  • Orange
  • Black
Power Source
  • DC-powered
  • AC-powered
Communication Protocols
  • Ethernet
  • Modbus
  • Profibus
  • Serial
Controller Design
  • Modular
  • Compact
Tags: Communication Module , YOKOGAWA

وصف المنتج

Description

The Yokogawa ALR121‑S50 is a dual‑port serial communication module designed for CENTUM VP and ProSafe‑RS systems. It supports RS‑422/RS‑485 interfaces and provides Modbus slave and subsystem communication functions for stable industrial data exchange.

Hardware Specifications

Parameter Specification
Model ALR121‑S50
Brand Yokogawa
Origin Japan
Weight Approx. 0.34 kg (typical ALR121 series weight)
Dimensions Standard Yokogawa I/O module form factor
Operating Temp ISA G3 rating (–20 to +70 °C, maintenance purpose only)
Power Consumption Current consumption 0.5 A (series‑standard)
Module Type Serial Communication Module
Interface RS‑422 / RS‑485 (4‑wire system)
Ports 2 serial communication ports
Communication Functions Modbus slave communication; subsystem communication
Explosion Protection Code “5” – no explosion protection
Suffix Code S50 (Standard type, no explosion protection)
Mounting Rack‑mounted within CENTUM VP / ProSafe‑RS I/O nests
PCB Coating Conformal coating (model‑dependent)
Product Type Serial Communication Modules

Functional Description

The ALR121‑S50 module provides two isolated serial communication ports supporting RS‑422/RS‑485 4‑wire operation. It enables Modbus slave communication and subsystem data exchange within Yokogawa control architectures. As part of the ALR121 family, the S50 suffix indicates a standard‑type module with no explosion protection, suitable for general‑purpose control‑room environments. The module routes serial data to the control processor through the backplane, ensuring deterministic communication timing for subsystem integration.

Frequently Asked Questions

Q: What communication protocols does ALR121‑S50 support? It supports Modbus slave communication and Yokogawa subsystem communication functions.

Q: What does the S50 suffix mean? “S” = Standard type “5” = No explosion protection “0” = Standard environmental rating

Q: Can ALR121‑S50 be hot‑swapped? No. Serial communication modules must be inserted or removed only when the I/O segment is de‑energized.

Field Installation Guidelines

  • Maintain shield continuity on serial communication wiring to reduce noise.
  • Ensure correct polarity and wiring for RS‑422/RS‑485 4‑wire connections.
  • Avoid routing serial lines near high‑current conductors to prevent interference.
  • Verify backplane connectors are fully seated before energizing the system.
  • Inspect terminal surfaces for contamination or oxidation prior to installation.
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