Process Automation Solution – YOKOGAWA CP461-50 S2 | CS3000 Processor Module
Where This Product Is Used
The YOKOGAWA CP461-50 S2 is the central processing unit of the CENTUM CS3000 Distributed Control System (DCS), deployed across the most demanding continuous-process industries worldwide. Engineers specify this module in:
- Oil & Gas Refineries – Crude distillation, hydrocracking, and pipeline SCADA control loops requiring deterministic scan cycles and redundant CPU failover.
- Chemical & Petrochemical Plants – Batch and continuous reactor control where millisecond-level response and IEC 61511 SIL compliance are mandatory.
- Power Generation – Boiler management systems (BMS), turbine governor control, and balance-of-plant automation in coal, gas, and combined-cycle facilities.
- Pulp & Paper Mills – Coordinated multi-loop control of digesters, bleach plants, and paper machines with tight integration to historian and MES layers.
- Pharmaceutical Manufacturing – FDA 21 CFR Part 11-compliant batch sequencing and audit-trail logging for API synthesis and fill-finish lines.
- Water & Wastewater Treatment – SCADA-integrated process control for large municipal treatment plants requiring high-availability CPU redundancy.
- LNG & Offshore Platforms – Hazardous-area control cabinets where the CP461-50 S2 serves as the primary field control station (FCS) processor.
Technical Specifications
| Part Number / SKU | CP461-50 S2 |
| Manufacturer | YOKOGAWA Electric Corporation |
| Product Series | CENTUM CS3000 DCS |
| Module Type | Field Control Station (FCS) Processor Module |
| CPU Architecture | Dual-redundant processor with automatic bumpless switchover |
| Control Execution Cycle | Configurable: 100 ms / 200 ms / 500 ms / 1 s / 2 s |
| I/O Capacity | Up to 2,048 I/O points per FCS node |
| Communication Bus | V-net (Vnet/IP compatible with upgrade path) |
| Power Supply Voltage | 24 V DC (supplied via nest/backplane) |
| Operating Temperature | 0 °C to +55 °C |
| Storage Temperature | -20 °C to +70 °C |
| Humidity | 10 % to 90 % RH (non-condensing) |
| Weight | 700 g (approx.) |
| Mounting | CS3000 FCS nest (slide-in card format) |
| Firmware | Compatible with CS3000 R3.x system software |
Why Engineers Specify This Model
- Bumpless Redundancy Switchover – The S2 suffix denotes the second-generation redundant processor pair. Failover occurs in <100 ms with zero process bump, meeting the uptime requirements of continuous-process plants.
- Deterministic Real-Time Control – Fixed-priority scheduling ensures control loops execute on time regardless of HMI load or historian polling, critical for tight PID and cascade loops.
- Proven Long-Term Availability – CS3000 has a documented installed base exceeding 20 years in service. Spare CP461-50 S2 modules are essential for lifecycle management and brownfield maintenance programs.
- Seamless CS3000 Ecosystem Integration – Drop-in replacement for existing FCS nests; no re-engineering of I/O wiring, function blocks, or HMI graphics required.
- Upgrade Bridge to CENTUM VP – The CP461-50 S2 supports phased migration strategies, allowing plants to modernize HMI and historian layers while retaining field wiring and I/O modules.
Complete System Bill of Materials
A fully operational CS3000 FCS node using the CP461-50 S2 typically includes the following components:
- CP461-50 S2 – Processor Module (this item) × 2 (redundant pair)
- EB401 / EB501 – FCS Nest / Backplane
- PW481 – Power Supply Module
- ESB105 / ESB401 – Expansion Bus Interface Module
- AAI141 / AAI543 – Analog Input/Output Modules
- ADV151 / ADV161 – Digital Input/Output Modules
- ALR111 – Alarm Module
- BCV041 – V-net Bus Coupler
- HIS (Human Interface Station) – Operator Workstation running CS3000 HMI
- EWS (Engineering Workstation) – For function block programming and system configuration
Contact Konmask.com for complete BOM sourcing and compatibility verification.
Compliance & Industry Standards
- IEC 61511 – Functional Safety for Process Industry Sectors (SIL-capable architecture)
- IEC 61131-3 – Programmable Controller Programming Languages (function block diagram)
- CE Marking – European conformity for electromagnetic compatibility (EMC Directive)
- UL / cUL Listed – North American electrical safety certification
- ATEX / IECEx – Compatible with hazardous-area cabinet installations (zone classification per system design)
- ISA-5.1 – Instrumentation symbols and identification standards compliance in engineering documentation
Quality Assurance & Sourcing
Every YOKOGAWA CP461-50 S2 unit sourced through Konmask.com undergoes a rigorous multi-stage quality process:
- Visual Inspection – PCB, connectors, and firmware label examined for physical integrity and authenticity markers.
- Functional Power-On Test – Module is energized and self-diagnostic routines are verified to complete without fault codes.
- Firmware Version Verification – Confirmed compatible with CS3000 R3.x system software prior to shipment.
- Anti-Static Packaging – Shipped in ESD-safe bags with foam cushioning inside double-wall corrugated cartons.
- Traceability Documentation – Serial number, test date, and inspector ID recorded for each unit; available on request.
We source from decommissioned plant inventories, authorized distributors, and OEM overstock channels. Counterfeit-risk screening is applied to all units before listing.
How to Source This Part
- Confirm Compatibility – Verify your CS3000 system software revision (R3.x) and nest type (EB401/EB501) match the CP461-50 S2 requirements.
- Request a Quote – Contact us at support@konmask.com or call +0086 19859288691 for volume pricing, lead time, and availability confirmation.
- Place Your Order – Add to cart and check out securely on Konmask.com, or request a proforma invoice for bank transfer / corporate PO.
- Receive & Verify – Inspect the unit against the provided serial number and test report. Our 30-day return policy covers DOA units.
- Install & Commission – Follow YOKOGAWA IM 33S01B30-01EN installation manual. Our technical team is available for pre-installation consultation.
Application-Specific FAQ
Q: Is the CP461-50 S2 a direct replacement for the CP461-50 (without S2 suffix)?
A: The S2 designates the second-generation redundant processor. It is physically and functionally compatible with the same FCS nest but offers improved redundancy switchover performance. Confirm with your YOKOGAWA system integrator before hot-swapping in a live system.
Q: Can this module be used in a non-redundant (simplex) FCS configuration?
A: Yes. The CP461-50 S2 can operate as a single (non-redundant) processor. The redundancy feature is activated only when a second CP461-50 S2 is installed in the paired slot of the same nest.
Q: What is the typical lead time for this part?
A: In-stock units ship within 2–5 business days internationally. For urgent plant shutdowns or emergency replacements, contact us directly for expedited options.
Q: Does Konmask.com provide a warranty?
A: Yes. All units carry a 90-day functional warranty covering defects in materials and workmanship under normal operating conditions. Extended warranty options are available on request.
Q: Can you supply the full CS3000 FCS nest assembly?
A: Yes. Konmask.com specializes in complete DCS spare parts sourcing. We can supply matched sets of processor modules, I/O cards, power supplies, and bus couplers. Contact us with your full BOM for a consolidated quote.
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Contact: support@konmask.com | +0086 19859288691
