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- ALR121-S53 | Yokogawa | ALR121 Serial Communication Modules
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ALR121-S53 | Yokogawa | ALR121 Serial Communication Modules
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- Part Number: ALR121-S53
- Brand: Yokogawa
- Type: Communication Modules
- Dimensions: 3.3x10.7x13cm
- Country of Origin: Japan
- Barcode: 8537101190
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Additional Specifications
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وصف المنتج
Description
The Yokogawa ALR121‑S53 is a dual‑port serial communication module designed for CENTUM VP and ProSafe‑RS systems. It supports RS‑422/RS‑485 interfaces and provides Modbus slave and subsystem communication functions for stable industrial data exchange.
Hardware Specifications
| Parameter | Specification |
|---|---|
| Model | ALR121‑S53 |
| Brand | Yokogawa |
| Origin | Japan |
| Weight | Approx. 0.34 kg |
| Shipping Weight | 1.5 kg |
| Dimensions | Standard Yokogawa I/O module form factor; no numeric value specified |
| Operating Temp | ISA G3 temperature rating (–20 to +70 °C, maintenance purpose only) |
| Power Consumption | Current consumption 0.5 A |
| Module Type | Serial Communication Module |
| Interface | RS‑422 / RS‑485 (4‑wire system) |
| Ports | 2 serial communication ports |
| Communication Functions | Modbus slave communication; subsystem communication |
| Explosion Protection | Code “5” – no explosion protection |
| Suffix Code | S53 (Standard type, no explosion protection, ISA G3 rating) |
| Mounting | Rack‑mounted within CENTUM VP / ProSafe‑RS I/O nests |
| PCB Coating | Conformal coating (model‑dependent) |
| Product Type | Serial Communication Modules |
Functional Description
The ALR121‑S53 module provides two isolated serial communication ports supporting RS‑422/RS‑485 4‑wire operation. It enables Modbus slave communication and subsystem data exchange within Yokogawa control architectures. As part of the ALR121 family, the S53 suffix indicates a standard‑type module with no explosion protection and ISA G3 environmental compliance. The module routes serial data to the control processor through the backplane, ensuring deterministic communication timing for subsystem integration.
Frequently Asked Questions
Q: What communication protocols does ALR121‑S53 support? It supports Modbus slave communication and Yokogawa subsystem communication functions.
Q: What does the S53 suffix mean? “S” = Standard type “5” = No explosion protection “3” = ISA G3 environmental rating (–20 to +70 °C for maintenance)
Q: Can ALR121‑S53 be hot‑swapped? No. Serial communication modules must be inserted or removed only when the I/O segment is de‑energized.
Field Installation Guidelines
- Maintain shield continuity on serial communication wiring to reduce noise.
- Ensure correct polarity and wiring for RS‑422/RS‑485 4‑wire connections.
- Avoid routing serial lines near high‑current conductors to prevent interference.
- Verify backplane connectors are fully seated before energizing the system.
- Inspect terminal surfaces for contamination or oxidation prior to installation.
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