Genuine Yokogawa SB401-50 - Industrial Automation Part

YOKOGAWA SB401-50 Interface Module

Category: YOKOGAWA

Description

Serial Bus Communication Solution — YOKOGAWA SB401-50 | CENTUM VP / CS 3000

Where This Product Is Used

The YOKOGAWA SB401-50 is a serial bus interface module deployed in process-critical environments where the DCS must exchange data with third-party field devices, analyzers, or subsystems over standard serial protocols. Typical installation sites include:

Oil & Gas Refineries — linking CENTUM VP field control stations to gas chromatographs, flow computers, and SCADA gateways via RS-422/RS-485 multi-drop networks.
Chemical & Petrochemical Plants — integrating analyzers (pH, conductivity, gas detection) that communicate over RS-232C into the plant DCS historian.
Power Generation Facilities — connecting turbine control subsystems and protection relays to the CENTUM supervisory layer for unified alarm management.
Pharmaceutical Manufacturing — interfacing clean-room environmental monitoring units and batch reactors requiring 21 CFR Part 11-compliant data logging.
Pulp & Paper Mills — bridging legacy serial-based actuator controllers into modernized CENTUM VP architectures during phased upgrades.
Water & Wastewater Treatment — enabling remote I/O communication between distributed pump stations and a central CENTUM control room.

Technical Specifications

Part Number	SB401-50
Manufacturer	Yokogawa Electric Corporation
Module Type	Serial Bus Interface Module
Compatible Platform	CENTUM VP, CENTUM CS 3000
Communication Interfaces	RS-232C / RS-422 / RS-485
Mounting	Field Control Station (FCS) node unit
Power Supply	Supplied via backplane (FCS chassis)
Operating Temperature	0 °C to +55 °C
Storage Temperature	−25 °C to +70 °C
Humidity	5 % to 95 % RH (non-condensing)
Weight	Approx. 500 g
Form Factor	Single-slot plug-in card
Firmware	Configurable via CENTUM Engineering Environment

Specifications are provided for reference. Always verify against the official Yokogawa SB401 hardware manual for your revision level.

Why Engineers Specify This Model

Multi-Protocol Flexibility — A single module supports RS-232C, RS-422, and RS-485, eliminating the need for separate interface cards per protocol and reducing spare-parts inventory.
Native CENTUM Integration — Designed by Yokogawa for CENTUM VP/CS 3000, the SB401-50 is configured entirely within the standard Engineering Environment — no third-party drivers or middleware required.
Deterministic Communication — Hardwired serial links provide predictable latency, critical for time-sensitive process loops where Ethernet-based solutions introduce jitter.
Long Service Life — Industrial-grade components rated for continuous 24/7 operation in harsh plant environments, consistent with Yokogawa’s platform longevity commitment.
Simplified Diagnostics — Module status is visible directly in the CENTUM HIS operator station, enabling rapid fault isolation without additional diagnostic tools.
Backward Compatibility — Supports migration paths from CS 3000 to CENTUM VP without rewiring field serial devices, protecting existing infrastructure investment.

Complete System Bill of Materials

A typical CENTUM VP serial integration project using the SB401-50 may also require:

CENTUM VP Field Control Station (FCS) chassis — e.g., AFV10D / AFV30D
Power supply module for FCS node — e.g., PW481 / PW482
Node unit communication bus cable
RS-485 termination resistors (120 Ω, field-side)
Serial cable assembly (DB9 / DB25 / terminal block, application-dependent)
CENTUM VP Engineering License (for configuration and commissioning)
Surge protection module for long-run RS-422/RS-485 field cables
DIN-rail mounting hardware and cable management accessories

Contact support@konmask.com for a complete BOM review tailored to your project.

Compliance & Industry Standards

CE Marking — Complies with applicable EU directives for industrial control equipment.
RoHS — Manufactured in accordance with RoHS substance restriction requirements.
IEC 61131 — Compatible with IEC 61131-compliant control system architectures.
ISA-5.1 / ISA-18.2 — Supports alarm management and instrumentation documentation standards when integrated within CENTUM VP.
IEC 62443 — Deployed within Yokogawa CENTUM VP systems that support IEC 62443 industrial cybersecurity frameworks.

Quality Assurance & Sourcing

Konmask.com sources the SB401-50 through verified industrial automation supply channels. Every unit offered is subject to the following quality controls:

Visual & Physical Inspection — Boards, connectors, and labeling examined for signs of damage, counterfeit markings, or non-OEM components.
Traceability Documentation — Batch and serial records maintained to support plant maintenance logs and audit requirements.
Functional Verification — Where test infrastructure permits, modules are bench-verified for communication response prior to dispatch.
Secure Packaging — ESD-safe bags, foam-lined cartons, and moisture-barrier packaging used for all shipments.
Warranty — Covered by Konmask’s standard warranty policy. Contact us for terms applicable to your order.

How to Source This Part

Confirm Compatibility — Verify your FCS chassis revision and CENTUM VP/CS 3000 software version against the Yokogawa SB401 compatibility matrix.
Request a Quote — Email support@konmask.com with your required quantity, delivery timeline, and any project documentation requirements.
Order & Lead Time — Standard and expedited lead times available. Konmask maintains stock of high-demand Yokogawa modules to support urgent MRO and project needs.
Shipping & Export — Worldwide shipping with export documentation (commercial invoice, packing list, COO) provided as standard. DDP/DAP Incoterms available on request.
After-Sales Support — Our technical team is available to assist with installation queries, configuration guidance, and warranty claims.

Application-Specific FAQ

Q: Can the SB401-50 be used in a CENTUM VP R6 system?
A: The SB401-50 is designed for CENTUM VP and CS 3000 platforms. Compatibility with specific revision levels (R5, R6, etc.) should be confirmed against Yokogawa’s hardware compatibility guide or by contacting our technical team.

Q: How many serial ports does the SB401-50 provide?
A: The SB401-50 provides serial communication channels configurable for RS-232C, RS-422, or RS-485. Refer to the Yokogawa SB401 hardware manual for the exact port count and configuration options for your firmware revision.

Q: Is the SB401-50 suitable for HART pass-through communication?
A: The SB401-50 is a serial bus interface module and is not designed for HART multiplexing. HART communication in CENTUM VP is handled by dedicated HART-enabled I/O modules (e.g., AAI141-H series).

Q: Can I use this module for Modbus RTU communication?
A: Yes. The RS-485 interface on the SB401-50 is commonly used for Modbus RTU master/slave communication with field devices. Protocol configuration is performed within the CENTUM VP Engineering Environment.

Q: What is the lead time for the SB401-50?
A: Lead times vary based on current stock levels. Contact support@konmask.com for real-time availability and expedited options.

Q: Do you provide a certificate of conformance (CoC)?
A: Yes. A CoC can be provided upon request for orders requiring traceability documentation for plant maintenance or procurement records.