Product Details
Product Overview
The Yokogawa ALR121-S53 functions as a high-performance Serial Communication Module within the CENTUM VP integrated production control system. This module facilitates seamless data exchange between the FCS (Field Control Station) and external subsystems. It provides two isolated ports supporting RS-422 and RS-485 protocols, ensuring high-speed, bidirectional connectivity for critical automation environments. We supply this unit as 100% Brand New and Original in its factory packaging.
Part Number Breakdown
| Code | Specification | Description |
| ALR121 | Model | Serial Communication Module (RS-422/RS-485, 2 ports) |
| -S | Type | Standard Type |
| 5 | Protection | With no explosion protection |
| 3 | Style | Style code for current hardware revision |
Technical Specifications
| Feature | Specification |
| Interface | RS-422/RS-485 (4-wire system) |
| Number of Ports | 2 |
| Communication Functions | Modbus Slave, Subsystem Communication |
| Current Consumption | 0.5 A |
| Weight | Approximately 0.34 kg |
| Mounting | Installs directly into FCS local or remote nodes |
Engineering Advantages
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Protocol Versatility: The ALR121-S53 executes Modbus slave functions natively. This eliminates the need for third-party protocol converters when integrating PLCs, power meters, or motor starters into the Yokogawa ecosystem.
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Signal Integrity: Dual-port isolation prevents ground loops and minimizes the impact of electromagnetic interference (EMI) commonly found in heavy industrial plants.
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Simplified Maintenance: The module supports "hot-swapping" under specific configuration rules. Engineers replace units without shutting down the entire control station, significantly reducing downtime.
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Optimized Power Profile: Consuming only 0.5 A, this module reduces the heat load within the system cabinet, extending the lifespan of adjacent I/O modules and power supplies.
FAQs
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Does this module include the necessary terminal blocks for RS-422 wiring?
Standard shipments include the module itself. You must verify if your specific installation requires the pressure-clamp or screw-terminal field wiring blocks (such as the AKB series cables) to complete the connection.
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Can the ALR121-S53 replace an older ALR121-S50 or S51 style?
Yes, the "-S53" represents the latest style code. It maintains full backward compatibility with previous S5x versions while offering updated hardware components for better long-term reliability.
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What is the maximum cable length supported by this module?
The RS-422/RS-485 interface supports distances up to 1200 meters. However, we recommend using high-quality shielded twisted-pair cables to maintain signal quality at these maximum lengths.
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Is this unit compatible with both CENTUM CS 3000 and CENTUM VP?
The ALR121-S53 primarily serves CENTUM VP systems. While hardware-compatible with many CS 3000 configurations, you should confirm your specific software revision and system bus requirements before installation.
Additional Information
- 100% Genuine Parts: All products are original and authentic, ensuring reliable industrial performance.
- 30-Day Refund Guarantee: Return any in-stock item within 30 days in original, unopened packaging for a full refund (excluding shipping and fees).
- 12-Month Warranty: Covers defects in materials or workmanship; excludes misuse, normal wear, or unauthorized modifications.
- Worldwide Shipping: We ship via USPS, UPS, FedEx, and DHL. Delivery times vary by country and may be subject to customs or import fees.
- Support & Contact: Technical and warranty assistance is available anytime. Contact us here: Contact.
- Purchase Guidance: Check product specifications and compatibility carefully before ordering to ensure proper application.
Tech & Buying Guide
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