The Yokogawa ALR121-S51 Serial Communication Module is designed to facilitate reliable and high-speed data communication in automation systems, especially in industries requiring precise control and monitoring. As part of GE’s range of control and automation products, this module provides seamless communication between controllers, sensors, and other devices over serial communication protocols. It is ideal for use in complex automation environments where fast, accurate, and secure data exchange is essential. The ALR121-S51 module supports a variety of serial communication standards and protocols, ensuring flexible and adaptable connectivity options for industrial systems.

The ALR121-S51 module is particularly useful for applications in industries such as manufacturing, process control, and energy. It enables effective integration of different communication standards into GE’s control systems, ensuring compatibility with a wide range of industrial equipment and third-party devices.

Product Specifications

Product Applications

The Yokogawa ALR121-S51 Serial Communication Module is used in various industrial and automation applications:

1. Industrial Automation: Provides reliable communication for industrial control systems, such as PLCs, HMIs, and SCADA systems.

2. Process Control: Enables the connection between process controllers and remote devices such as flow meters, temperature sensors, and actuators.

3. Building Automation: Facilitates communication between building management systems and environmental control systems (e.g., HVAC, lighting, and access control).

4. Energy Management: Used for communication between smart meters, energy controllers, and supervisory systems in energy management applications.

5. Manufacturing: Ensures reliable data exchange between various machinery, automation systems, and production lines.

6. Remote Monitoring: Supports communication in remote monitoring systems, enabling real-time data collection and analysis.

Product Advantages

• High-Speed Data Transmission: With a data rate of up to 115,200 bps, the ALR121-S51 ensures fast and efficient communication between devices in demanding applications.

• Wide Communication Protocol Support: It supports RS-232, RS-485, and Modbus RTU protocols, ensuring compatibility with a wide range of devices and control systems.

• Extended Transmission Distance: With RS-485, the module allows communication over distances up to 1,200 meters, making it suitable for large-scale installations.

• Robust Isolation: The module features 2500V isolation, providing protection against electrical surges and ensuring reliable operation in harsh environments.

• Flexible Mounting: The module is DIN rail-mounted, which makes it easy to integrate into existing control panels and electrical cabinets.

• Wide Temperature Range: Operating from -20°C to 70°C, the module is designed to function in a wide variety of industrial environments, even in extreme conditions.

• Compact and Lightweight: The small dimensions and low weight (0.3 kg) make it ideal for installations with limited space.

• Reliable and Secure Communication: The use of serial communication protocols ensures stable and secure data transmission over long distances.

FAQ

1. What communication protocols does the ALR121-S51 support?

   • The module supports RS-232, RS-485, and Modbus RTU protocols, providing flexibility for different communication requirements.

2. What is the maximum data transmission rate of the ALR121-S51?

   • The module supports a data transmission rate of up to 115,200 bps, ensuring fast and efficient communication.

3. How far can the ALR121-S51 communicate over RS-485?

   • The ALR121-S51 supports communication over distances up to 1,200 meters when using RS-485.

4. What is the isolation rating of the module?

   • The ALR121-S51 features 2500V isolation, offering protection against electrical surges and interference.

5. What power supply does the module require?

   • The module requires a 24V DC power supply to operate.

6. What is the mounting type for the ALR121-S51?

   • The module is designed for DIN rail mounting, making it easy to integrate into control systems.

7. What is the operating temperature range of the module?

   • The module operates in temperatures ranging from -20°C to 70°C, making it suitable for a wide range of industrial environments.

8. What is the weight of the ALR121-S51 module?

   • The ALR121-S51 weighs 0.3 kg, making it lightweight and easy to handle during installation.

9. Can the ALR121-S51 module be used in remote monitoring applications?

   • Yes, the ALR121-S51 is ideal for use in remote monitoring applications, where real-time data collection and analysis are needed.

10. What protection level does the ALR121-S51 module offer?

• The module has an IP20 protection level, ensuring it is resistant to dust and moisture.