In the fast-paced world of industrial automation, uninterrupted and accurate data exchange is paramount.

The Yokogawa ALR121-S00 S1 Serial Communication Module delivers robust, half-duplex serial connectivity, making it an essential component for process controllers and distributed control systems.

Available through Apter Power, this module is backed by dedicated support from our customer service manager, May (sales8@apterpower.com), ensuring seamless integration and ongoing assistance.

Key Features and Specifications

1. Interface Type: RS-422 / RS-485

2. Communication Function: Half-duplex, enabling bidirectional data flow while minimizing wiring complexity

3. Synchronization Method: Start-stop synchronization for reliable frame alignment

4. Transmission Encoding: Supports both ASCII and binary formats, accommodating diverse device protocols

5. Baud Rate: Programmable from 1,200 to 38,400 bps, ensuring compatibility with a wide range of field instruments

6. Character Length: Configurable for 7 or 8 bits, providing flexibility for legacy or modern devices

7. Stop Bit Length: Options for 1 or 2 bits, balancing error detection with throughput requirements

8. Parity Check: None, even, or odd parity modes to enhance data integrity

9. Post-Transmission Delay: 1 ms lag time, minimizing turnaround delays in polling cycles

10. Physical Weight: Approximately 0.34 kg, making installation compact and space-efficient

Compatibility and Integration
The ALR121-S00 S1 seamlessly integrates with multiple Yokogawa control platforms, including:

1. Field Control Units: AFV10, AFV30, AFV40, AFF50 – widely used in petrochemical, power generation, and water treatment plants for real-time process management.

2. ESB Bus Node Units: ANB10 (standard) and ANB11 (optical), facilitating extended communication distances and improved noise immunity on the ESB backbone.

3. ER Bus Node Units: ANR10, ensuring reliable data exchange between remote I/O racks and host controllers.

Why Choose Apter Power?
At Apter Power, we specialize in providing genuine automation parts and timely technical support. When you order the ALR121-S00 S1 through us, you benefit from:

1. Dedicated Support: Customer service manager May (sales8@apterpower.com) is available to answer technical inquiries, suggest optimal configurations, and expedite order processing.

2. Extensive Inventory: We stock popular Yokogawa series such as the DCS Centum VP, FCN/STARDOM, ProSafe-RS, and legacy modules like ALR124 variants, reducing lead times for replacement parts.

3. Global Sourcing: If a specific module is unavailable, our multilingual team locates the best-priced, factory-authenticated components from our extensive network of suppliers.

Popular Yokogawa Series and Models

u Centum VP (CS3000 Successor): Known for robust scalability, this DCS supports high-density I/O and advanced batch automation.

u ProSafe-RS: Yokogawa’s SIL 3 certified safety solution for critical process shutdowns and emergency interlocks.

u STARDOM FCN (e.g., FCN-3000, FCN-500): Compact controllers designed for small-to-medium applications, offering plug-and-play I/O cards.

u FA-M3 PLC Series: A versatile family of PLCs (e.g., C0, C2, E2 models) widely used for machine control and batch processes.

u ALR124-S10: An extended-range successor to the ALR121 series, offering higher transmission speeds up to 115.2 kbps.

Conclusion
The Yokogawa ALR121-S00 S1 Serial Communication Module stands out for its dependable half-duplex operation, flexible configuration options, and seamless compatibility with Yokogawa’s leading control platforms. Whether you are retrofitting an aging FA-M3 installation or expanding a Centum VP network, this module ensures stable data transmission across RS-422/RS-485 links. For expert guidance and prompt delivery, reach out to May at Apter Power via sales8@apterpower.com—your trusted partner in automation solutions.