YOKOGAWA ALR121-S00 S1 – Serial Communication Interface Module | CENTUM CS 3000 / VP DCS Platform
Engineering Background
The ALR121-S00 is a dedicated serial communication interface module engineered for YOKOGAWA’s CENTUM CS 3000 and CENTUM VP Distributed Control Systems. Designed to bridge field devices and the DCS backbone via RS-232C / RS-422 / RS-485 serial protocols, this module enables reliable data exchange in process-critical environments including oil & gas, petrochemical, power generation, and advanced manufacturing.
Product Positioning
As a factory-original YOKOGAWA component, the ALR121-S00 S1 is the OEM-specified replacement and expansion module for CENTUM CS 3000 / VP installations requiring serial communication I/O. It is fully backward-compatible within the CENTUM platform and supports hot-swap operation to minimize process downtime during maintenance cycles.
Complete Technical Specifications
- Part Number: ALR121-S00 S1
- Manufacturer: YOKOGAWA Electric Corporation
- Module Type: Serial Communication Interface Module
- Compatible Platform: CENTUM CS 3000, CENTUM VP
- Communication Protocols: RS-232C, RS-422, RS-485
- Interface Standard: Serial (asynchronous)
- Mounting: DCS Field Control Station (FCS) card slot
- Power Supply: Supplied via backplane (DCS chassis)
- Operating Temperature: 0°C to +55°C
- Storage Temperature: -25°C to +70°C
- Humidity: 5% to 95% RH (non-condensing)
- Weight: Approx. 300 g
- Compliance: CE, RoHS
- Country of Origin: Japan
Proven Application Environments
- Oil & Gas upstream / midstream / downstream process control
- Petrochemical and refinery DCS integration
- Power plant distributed control and SCADA interfacing
- Pharmaceutical batch process automation
- Pulp & paper and water treatment plant control systems
- Any CENTUM CS 3000 / VP installation requiring serial device integration
Engineering Advantages
- Multi-protocol flexibility: Supports RS-232C, RS-422, and RS-485 in a single module form factor
- Hot-swap capable: Enables module replacement without full system shutdown, reducing MTTR
- OEM-grade reliability: Manufactured to YOKOGAWA’s IEC 61508 functional safety standards
- Seamless CENTUM integration: Plug-and-play within existing CS 3000 / VP FCS chassis — no additional configuration hardware required
- Long service life: Designed for 24/7 continuous operation in industrial environments
System Architecture & Signal Flow
The ALR121-S00 S1 installs directly into the Field Control Station (FCS) card cage of a CENTUM CS 3000 or CENTUM VP system. Serial field devices (analyzers, drives, smart transmitters, third-party controllers) connect to the module’s serial port. The module handles protocol conversion and data framing, passing structured process data to the FCS CPU via the internal backplane bus. Engineering configuration is performed through YOKOGAWA’s CENTUM VP Builder or CS 3000 System View software.
Sourcing & Quality Verification
- All units sourced from authorized YOKOGAWA distribution channels or verified OEM surplus
- Each module undergoes incoming inspection: visual, label verification, and functional power-on check
- Original YOKOGAWA firmware — no third-party modifications
- Traceability documentation available upon request for regulated industries
- Packaging: anti-static ESD bag + foam-lined carton for safe international transit
Procurement Process
- Step 1: Confirm your CENTUM platform version (CS 3000 R3.x / VP R5.x or later) and FCS chassis slot availability
- Step 2: Submit your RFQ or place order directly via Konmask.com product page
- Step 3: Receive order confirmation + lead time estimate within 1 business day
- Step 4: Module ships with inspection report; DHL / FedEx international express available
- Step 5: Post-delivery technical support via email or WhatsApp for installation guidance
Technical FAQ
- Q: Is the ALR121-S00 S1 compatible with CENTUM VP R6.x?
- A: Yes. The ALR121-S00 S1 is backward-compatible with CENTUM VP R5.x and R6.x FCS platforms. Confirm your FCS model number for slot compatibility.
- Q: Can this module replace an ALR121-S00 without the S1 suffix?
- A: The S1 suffix denotes a hardware revision. In most installations these are interchangeable, but please verify with your CENTUM system documentation or contact our engineers before substitution.
- Q: What serial baud rates are supported?
- A: Baud rate is configurable via CENTUM Builder software; typical supported rates are 1200 to 115200 bps depending on the connected device specification.
- Q: Do you provide a warranty?
- A: Yes — 12-month warranty against manufacturing defects. DOA units are replaced or refunded within 30 days of delivery.
- Q: Can I request a datasheet or YOKOGAWA GS document?
- A: Yes. Contact support@konmask.com with your part number and we will provide the relevant YOKOGAWA General Specifications document.
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