
Product Description
Yokogawa ALR121-SE1 Serial Communication Module Overview
The Yokogawa ALR121-SE1 is an advanced 2-port RS-422/RS-485 serial communication module engineered for seamless integration within distributed control systems (DCS) and industrial automation networks. Designed to facilitate robust data exchange between field devices, PLCs, and supervisory systems, this module delivers exceptional reliability in mission-critical environments where communication integrity is paramount.
Technical Specifications
- Communication Ports: Dual RS-422/RS-485 serial interfaces
- Protocol Support: Modbus RTU, proprietary Yokogawa protocols
- Baud Rate Range: 300 to 38,400 bps (configurable)
- Isolation: Optical isolation up to 1500V DC for enhanced noise immunity
- Operating Temperature: 0°C to 55°C (32°F to 131°F)
- Power Consumption: Low-power design for energy-efficient operation
- Mounting: DIN rail compatible for standard industrial enclosures
Application Scenarios
The ALR121-SE1 excels in diverse industrial applications including process automation, manufacturing execution systems (MES), SCADA networks, and multi-device polling architectures. Its dual-port configuration enables simultaneous communication with multiple field instruments such as flow meters, temperature transmitters, and analytical sensors, while maintaining data integrity through advanced error-checking mechanisms.
Engineering Solutions
This module addresses common industrial challenges including electromagnetic interference (EMI) mitigation through galvanic isolation, long-distance communication up to 1200 meters via RS-485 multi-drop topology, and seamless integration with legacy equipment. The ALR121-SE1 supports hot-swappable installation in compatible Yokogawa chassis, minimizing downtime during maintenance operations.
System Integration Benefits
Engineers benefit from simplified wiring through terminal block connections, diagnostic LEDs for real-time status monitoring, and compatibility with Yokogawa's FieldMate configuration software. The module's firmware supports automatic baud rate detection and protocol negotiation, reducing commissioning time and configuration errors in complex multi-vendor environments.
Related Products
| Product Model | Description | Link |
|---|---|---|
| ALR111 | Single-Port RS-422/RS-485 Serial Communication Module | View ALR111 Module |
| ALR121-S53 S1 | Enhanced Serial Communication Module with Extended Features | View ALR121-S53 Module |
| NFLR121-S50 S1 | High-Performance RS-422/RS-485 Communication Interface | View NFLR121-S50 Module |
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