Yokogawa ALR111-S01 CENTUM VP Serial Communication Module

Product Overview

The Yokogawa ALR111-S01 functions as a high-performance serial gateway for the CENTUM VP and CS 3000 Distributed Control Systems (DCS). This module enables the Field Control Unit (FCU) to interface seamlessly with third-party subsystems, including PLCs, power monitors, and gas chromatographs. By establishing a robust digital link via two RS-232C ports, the ALR111-S01 centralizes external device data into the primary control environment. We supply this unit as 100% Brand New and Original, manufactured in France, to ensure peak operational integrity for your mission-critical automation infrastructure.

Part Number Breakdown

The ALR111-S01 utilizes Yokogawa’s standard suffix logic to define hardware specifications and functional revisions:

Technical Specifications

The ALR111-S01 maintains precise data throughput across dual independent channels. We guarantee this product arrives in 100% Brand New Original condition.

• Communication Interface: RS-232C (Dual Ports).

• Connection Port: D-sub 9-pin (Male).

• Transmission Speed: 300 bps to 115.2 kbps.

• Dimensions: 3.2 cm (W) x 10.6 cm (D) x 13.0 cm (H).

• Module Weight: 0.3 kg.

• Country of Origin: France.

• System Compatibility: CENTUM VP and CENTUM CS 3000.

Engineering Advantages

The ALR111-S01 solves several critical integration challenges in modern process plants:

• Processor Offloading: An onboard dedicated processor manages the entire serial protocol stack. This architectural choice frees the main Field Control Unit (FCU) processor to focus exclusively on real-time control logic, preventing communication overhead from slowing down critical loops.

• Optimized Subsystem Integration: The module supports Modbus RTU and user-defined ASCII protocols. This versatility allows engineers to pull data from diverse multi-vendor hardware—such as power meters or analytical equipment—directly into the DCS HMI.

• High-Density Cabinet Utilization: The slim 3.2 cm profile maximizes available space within the I/O node. This compact design allows for the installation of multiple serial gateways within a single rack, reducing the total hardware footprint and associated cooling requirements.

• Dual-Port Independence: Each of the two ports operates autonomously. Within the CENTUM engineering software, you can configure unique baud rates, parity settings, and communication protocols for each port, providing the flexibility to connect two different types of devices to a single module.

FAQs

• Does the ALR111-S01 support redundant configurations?

  Yes. You can configure two ALR111-S01 modules in a duplexed (redundant) setup. In this mode, the standby module automatically assumes control of the communication tasks if the active module detects a hardware failure, ensuring zero data loss.

• What is the maximum cable distance for the RS-232C connection?

  Standard RS-232C protocols typically support cable lengths up to 15 meters. To extend this range, we recommend using RS-232 to RS-422/485 converters or optical isolators to maintain signal fidelity over longer distances.

• How do I verify that this is a genuine Yokogawa part?

  Every ALR111-S01 we supply is 100% Brand New Original. The hardware features "Made in France" labeling and includes full serial number traceability back to the manufacturer’s factory records.

• Can I use this module with third-party Modbus devices?

  Absolutely. The module integrates with the CENTUM software to facilitate Modbus RTU communication, making it an ideal bridge for power monitors, VFDs, and other common industrial serial devices.