ALR111-S01 Yokogawa ALR111 RS-232C Communication Module

Industrial Communication Solution Overview

ALR111-S01 is a high-reliability serial communication module developed by Yokogawa.

The module supports stable RS-232C communication in industrial control systems.

ALR111-S01 integrates seamlessly with Yokogawa SCS architectures.

The design focuses on communication stability, subsystem integration, and Modbus slave connectivity.

Engineers commonly deploy this module in distributed control and process automation environments.

The ISA Standard G3 coating improves durability in corrosive industrial atmospheres.

This module supports point-to-point half-duplex communication with binary transmission coding.

The dual-port structure simplifies subsystem communication deployment.

Global PLC Spare HUB's Insight

Yokogawa ALR111 Series modules are widely used in process-critical automation systems.

The module performs reliably in high-noise industrial environments.

Its Modbus communication capability supports stable third-party device integration.

Many engineers choose this model for long-term communication stability and maintenance convenience.

The ISA G3 specification improves operational reliability in chemical and offshore environments.

This module is suitable for:

• Distributed Control Systems (DCS)
• Process automation systems
• Industrial communication gateways
• Energy management systems
• SCADA integration architectures
• Factory communication networks

Recommended application industries include:

• Oil and gas
• Petrochemical plants
• Power generation
• Water treatment
• Pharmaceutical manufacturing
• Heavy industrial automation

Diagnostic capabilities include:

• Communication fault monitoring
• Serial transmission verification
• Subsystem connection diagnostics
• Modbus communication status analysis
• Industrial network troubleshooting support

Module Architecture

Brand	Yokogawa
Model	ALR111-S01
Series	ALR111 Serial Communication Module
Communication Interface	RS-232C
Communication Method	Point-to-point
Transmission Mode	Half-duplex
Synchronization Method	Start-stop synchronization
Transmission Code	Binary
Character Length	8 bits
Stop Bit Length	1 / 2 bits
Parity Check	None / Even / Odd
Transmission Distance	Maximum 15 m
Transmission Delay	1 ms after data transmission
Communication Speeds	1200 / 2400 / 4800 / 9600 / 19200 / 38400 bps
Connection Ports	D-sub 9-pin female × 2
Communication Functions	Modbus slave and subsystem communication
Current Consumption	0.5 A
Weight	Approx. 0.3 kg
Environmental Protection	ISA Standard G3
Installation Platforms	SSC60 / SSC50 / SSC57 / SSC10 / SNB10D
Supported Wiring	AKB131 / AKB132 / AKB135 / AKB136 cables

Configuration Breakdown

• ALR111-S01
  • Base Model
    • ALR111 = Serial Communication Module
  • Suffix Code Structure
    • S = Standard type
    • 0 = Without explosion protection
    • 1 = ISA Standard G3 protection

Engineering Design Features

• Dual-port communication architecture improves subsystem flexibility
• Supports industrial Modbus slave communication environments
• Maintains stable binary data transmission performance
• Supports configurable parity and stop-bit settings
• Designed for Yokogawa SCS communication integration
• ISA G3 coating improves resistance to corrosive atmospheres
• Compact hardware structure simplifies cabinet installation

Installation and System Integration

• Mount directly onto SSC60, SSC50, SSC57, SSC10, or SNB10D units
• SNB10D communicates through the ESB bus structure
• Use compatible Yokogawa communication cables for stable transmission
• Both communication ports must use identical communication functions
• Verify communication speed consistency before commissioning
• Ensure proper RS-232C grounding practices during installation

Communication Engineering Notes

• Mixed communication types cannot operate simultaneously on one module
• Subsystem communication fixes the character length to 8 bits
• Subsystem communication fixes the stop bit length to 1 bit
• Communication performance depends on wiring quality and grounding conditions
• Transmission distance should remain within 15 meters

Packaging Information

• 1 × ALR111-S01 communication module
• Protective industrial packaging
• Product identification labeling
• Inspection and handling protection materials

Shipping and Warranty Terms

• Warranty Period: 12 months
• Shipping Methods: FedEx, UPS, DHL
• Dispatch Lead Time: Fast international processing available
• Packaging Method: Industrial-grade anti-static protection

Professional FAQ

• Why do both communication ports require identical communication functions?

  The hardware architecture processes one communication protocol type per module.

• What installation issue commonly affects RS-232C stability?

  Poor grounding often introduces communication noise and intermittent faults.

• How should engineers select the correct communication speed?

  Match the baud rate with the connected subsystem specifications.

• What advantage does ISA Standard G3 provide?

  It improves reliability in corrosive industrial environments.

• Which application environments benefit most from this module?

  Process automation systems requiring stable serial communication integration.

• What practical issue appears during long-term subsystem operation?

  Improper cable shielding may increase communication retries and signal instability.

• How can users reduce communication interruptions?

  Use high-quality shielded cables and stable grounding practices.

• What should buyers confirm before ordering?

  Verify compatibility with the installed Yokogawa SSC platform.

• Why is half-duplex communication useful in industrial systems?

  It reduces wiring complexity and supports reliable serial data exchange.

• What maintenance practice improves communication reliability?

  Regularly inspect D-sub connectors for oxidation and loose connections.

Tags