YOKOGAWA ALR121-S50 Serial Communication Modules

Overview

The Yokogawa ALR121-S50 is a specialized serial communication module for industrial applications, particularly in safety control systems. It provides a reliable and efficient means to connect various devices and systems within a network. This module works with Yokogawa’s safety control stations (SCS) to enable Modbus communication.

Key Features and Specifications

Interface: RS-422/RS-485 (4-wire system)
Connection Method: Point-to-point (RS-422) and Multipoint (RS-485)
Communication Function: Half-duplex
Synchronization Method: Start-stop synchronization
Transmission Speed: 1200/2400/4800/9600/19200/38400 bps
Transmission Code: Binary
Character Length: 8 bits (fixed)
Stop Bit Length: 1 bit (fixed)
Parity Check: None/even/odd
Compatibility: Compatible with Yokogawa’s SSC60□, SSC50□, SSC10□ safety control units, and SNB10D safety node unit.

Applications

Modbus Communication: Facilitates Modbus communication between the safety control station and other devices.
Subsystem Communication: Enables communication with subsystems such as sequencers.
Data Transmission: Transmits data between connected devices, including process parameters and control commands.
Industrial Automation: Used in various industrial automation applications requiring reliable serial communication.

Benefits

Reliability: Operates well in harsh industrial environments.
Flexibility: Supports both point-to-point and multipoint connections.
Compatibility: Works with a wide range of Yokogawa safety control systems.
Ease of Use: Simple configuration and integration into existing systems.
Safety: Enhances system safety by providing reliable communication for safety-critical applications.

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