Yokogawa ALR121-S51 S1 Serial Communication Module | RS-422/485
Yokogawa ALR121-S51 S1 Serial Communication Module | RS-422/485
Manufacturer: Yokogawa
Product No.: ALR121-S51 S1
Condition:1000 in stock
Product Type: Serial Communication Module
Product Origin: 8937047556355
Payment: T/T, Western Union
Weight: 340g
Shipping port: Xiamen
Warranty: 12 months
- 24/7 Support
- 30-Day Returns
- Fast Shipping
Yokogawa ALR121-S51 S1 Serial Communication Module
The Yokogawa ALR121-S51 S1 is an industrial-grade serial communication module designed for seamless integration within CENTUM VP and CENTUM CS 3000 distributed control systems. Featuring dual RS-422/RS-485 serial ports, this module enables reliable data exchange between DCS controllers and third-party field devices, PLCs, analyzers, and legacy equipment across process automation environments.
Technical Specifications
- Model Number: ALR121-S51 S1
- Communication Ports: 2 independent RS-422/RS-485 serial ports
- Protocol Support: Modbus RTU, ASCII, custom serial protocols
- Baud Rate Range: 300 to 115,200 bps
- Data Bits: 7 or 8 bits configurable
- Parity: None, Even, Odd
- Stop Bits: 1 or 2 bits
- Electrical Interface: EIA RS-422/RS-485 compliant
- Isolation: 1500V DC channel-to-system isolation
- Operating Temperature: -10°C to +55°C (14°F to 131°F)
- Power Consumption: 3.5W typical
- Mounting: CENTUM I/O module rack compatible
Advanced Features
Dual-Port Architecture: Two independent serial communication channels allow simultaneous connection to multiple field devices, reducing infrastructure costs and simplifying wiring in distributed installations.
Protocol Flexibility: Supports industry-standard Modbus RTU for interoperability with thousands of compatible devices, plus custom protocol implementation through user-configurable parameters for proprietary equipment integration.
Galvanic Isolation: Built-in 1500V isolation protects DCS backplane from electrical noise, ground loops, and voltage transients common in industrial environments with heavy machinery and power distribution systems.
Hot-Swappable Design: Field-replaceable module architecture enables maintenance without system shutdown, critical for continuous process industries requiring 24/7 uptime.
Industrial Application Scenarios
Analyzer Integration: Connect gas chromatographs, mass spectrometers, and process analyzers to DCS for real-time composition monitoring in petrochemical refineries and chemical manufacturing plants.
Third-Party PLC Communication: Interface with Allen-Bradley, Siemens, Mitsubishi, and other PLC brands for hybrid control architectures combining DCS supervisory control with specialized PLC-based subsystems.
Legacy Equipment Connectivity: Maintain communication with older serial-based instruments and controllers during phased modernization projects, protecting capital investment while upgrading control infrastructure.
Remote I/O Expansion: Extend DCS I/O capacity using serial-connected remote terminal units (RTUs) in geographically distributed facilities like water treatment plants, pipeline monitoring stations, and mining operations.
System Integration Solutions
The ALR121-S51 S1 integrates directly into Yokogawa CENTUM VP R6 and CS 3000 R3 systems via high-speed V-net backplane communication. Configuration is performed through the Engineering Workstation using Control Drawing Builder, where serial port parameters, protocol settings, and data mapping are defined graphically without custom programming.
When deployed with Yokogawa's Exaopc OPC server, the module enables seamless data exchange with SCADA systems, MES platforms, and enterprise databases—bridging operational technology (OT) and information technology (IT) domains for Industry 4.0 initiatives.
Performance Benefits
- Reduces integration complexity by consolidating serial communications within DCS architecture
- Eliminates standalone protocol converters and gateways, lowering total cost of ownership
- Provides deterministic communication timing for time-critical control loops
- Supports up to 32 devices per port using RS-485 multi-drop topology
- Ensures data integrity through built-in CRC error checking and automatic retry mechanisms
Related Products
| Product Name | Description | Verified Link |
|---|---|---|
| Yokogawa ALR111 Serial Communication Module | Single-port RS-232C serial interface for DCS integration | View Product |
| Yokogawa ALR121-S50 Serial Communication Module | Dual-port RS-422/485 module with alternative configuration | View Product |
| Yokogawa ALR121-S53 S1 Serial Communication Module | Enhanced dual-port serial module with extended features | View Product |
All product links verified for direct customer access.
Quality & Compliance
Manufactured under ISO 9001:2015 quality management system with CE marking for European compliance, UL/cUL certification for North American installations, and IEC 61131-2 conformance for industrial controller equipment standards.
© 2025 INDUSTRIAL CONTROL HUB. All rights reserved.
Original Source: https://www.indctrlhub.com
Contact: sales@indctrlhub.com | +0086 18359243191
Product Description
Yokogawa ALR121-S51 S1 Serial Communication Module
The Yokogawa ALR121-S51 S1 is an industrial-grade serial communication module designed for seamless integration within CENTUM VP and CENTUM CS 3000 distributed control systems. Featuring dual RS-422/RS-485 serial ports, this module enables reliable data exchange between DCS controllers and third-party field devices, PLCs, analyzers, and legacy equipment across process automation environments.
Technical Specifications
- Model Number: ALR121-S51 S1
- Communication Ports: 2 independent RS-422/RS-485 serial ports
- Protocol Support: Modbus RTU, ASCII, custom serial protocols
- Baud Rate Range: 300 to 115,200 bps
- Data Bits: 7 or 8 bits configurable
- Parity: None, Even, Odd
- Stop Bits: 1 or 2 bits
- Electrical Interface: EIA RS-422/RS-485 compliant
- Isolation: 1500V DC channel-to-system isolation
- Operating Temperature: -10°C to +55°C (14°F to 131°F)
- Power Consumption: 3.5W typical
- Mounting: CENTUM I/O module rack compatible
Advanced Features
Dual-Port Architecture: Two independent serial communication channels allow simultaneous connection to multiple field devices, reducing infrastructure costs and simplifying wiring in distributed installations.
Protocol Flexibility: Supports industry-standard Modbus RTU for interoperability with thousands of compatible devices, plus custom protocol implementation through user-configurable parameters for proprietary equipment integration.
Galvanic Isolation: Built-in 1500V isolation protects DCS backplane from electrical noise, ground loops, and voltage transients common in industrial environments with heavy machinery and power distribution systems.
Hot-Swappable Design: Field-replaceable module architecture enables maintenance without system shutdown, critical for continuous process industries requiring 24/7 uptime.
Industrial Application Scenarios
Analyzer Integration: Connect gas chromatographs, mass spectrometers, and process analyzers to DCS for real-time composition monitoring in petrochemical refineries and chemical manufacturing plants.
Third-Party PLC Communication: Interface with Allen-Bradley, Siemens, Mitsubishi, and other PLC brands for hybrid control architectures combining DCS supervisory control with specialized PLC-based subsystems.
Legacy Equipment Connectivity: Maintain communication with older serial-based instruments and controllers during phased modernization projects, protecting capital investment while upgrading control infrastructure.
Remote I/O Expansion: Extend DCS I/O capacity using serial-connected remote terminal units (RTUs) in geographically distributed facilities like water treatment plants, pipeline monitoring stations, and mining operations.
System Integration Solutions
The ALR121-S51 S1 integrates directly into Yokogawa CENTUM VP R6 and CS 3000 R3 systems via high-speed V-net backplane communication. Configuration is performed through the Engineering Workstation using Control Drawing Builder, where serial port parameters, protocol settings, and data mapping are defined graphically without custom programming.
When deployed with Yokogawa's Exaopc OPC server, the module enables seamless data exchange with SCADA systems, MES platforms, and enterprise databases—bridging operational technology (OT) and information technology (IT) domains for Industry 4.0 initiatives.
Performance Benefits
- Reduces integration complexity by consolidating serial communications within DCS architecture
- Eliminates standalone protocol converters and gateways, lowering total cost of ownership
- Provides deterministic communication timing for time-critical control loops
- Supports up to 32 devices per port using RS-485 multi-drop topology
- Ensures data integrity through built-in CRC error checking and automatic retry mechanisms
Related Products
| Product Name | Description | Verified Link |
|---|---|---|
| Yokogawa ALR111 Serial Communication Module | Single-port RS-232C serial interface for DCS integration | View Product |
| Yokogawa ALR121-S50 Serial Communication Module | Dual-port RS-422/485 module with alternative configuration | View Product |
| Yokogawa ALR121-S53 S1 Serial Communication Module | Enhanced dual-port serial module with extended features | View Product |
All product links verified for direct customer access.
Quality & Compliance
Manufactured under ISO 9001:2015 quality management system with CE marking for European compliance, UL/cUL certification for North American installations, and IEC 61131-2 conformance for industrial controller equipment standards.
© 2025 INDUSTRIAL CONTROL HUB. All rights reserved.
Original Source: https://www.indctrlhub.com
Contact: sales@indctrlhub.com | +0086 18359243191