Process Automation Solution — Yokogawa CP451-51 S2 | CENTUM CS/CS3000 Series
Where This Product Is Used
The Yokogawa CP451-51 S2 is a field-proven processor module deployed across mission-critical continuous process industries. Typical installation environments include:
- Oil & Gas Refineries — Crude distillation unit (CDU) control, compressor surge control, and pipeline SCADA integration
- Petrochemical & Chemical Plants — Reactor temperature/pressure loop management, batch sequencing, and safety interlock coordination
- Power Generation — Boiler combustion control, turbine governor interfacing, and load dispatch automation
- Pulp & Paper Mills — Digester control, stock preparation, and machine-direction quality control
- Pharmaceutical Manufacturing — GMP-compliant batch processing, CIP/SIP cycle automation, and audit-trail data logging
- Water & Wastewater Treatment — SCADA-linked pump station control, dosing automation, and remote telemetry
- LNG & Offshore Platforms — Hazardous-area process control with redundant CPU architecture
Technical Specifications
| Parameter | Specification |
|---|---|
| Part Number | CP451-51 S2 |
| Manufacturer | Yokogawa Electric Corporation |
| Series | CENTUM CS / CS3000 |
| Module Type | Central Processor Unit (CPU) Module |
| Processor Architecture | 32-bit RISC |
| Control Execution Cycle | Configurable: 100 ms / 200 ms / 500 ms / 1 s |
| Communication Interface | V-net (Yokogawa proprietary control bus) |
| Redundancy Support | Dual-redundant CPU pairing supported |
| Operating Temperature | 0 °C to +55 °C |
| Storage Temperature | −20 °C to +70 °C |
| Relative Humidity | 5% to 95% RH (non-condensing) |
| Power Consumption | Refer to FCS station power budget |
| Weight | Approx. 300 g |
| Mounting | Nest-mount within CENTUM FCS/HIS station chassis |
| Firmware Revision | S2 (second-generation silicon revision) |
Why Engineers Specify This Model
- S2 Silicon Revision — Enhanced thermal stability and extended component lifecycle vs. original S1 revision; preferred for long-horizon plant lifecycles (15–25 years).
- Deterministic Scan Cycle — Hard real-time execution guarantees loop closure within configured cycle time, critical for pressure and flow control in exothermic reactions.
- Seamless Redundancy Switchover — Bumpless transfer (<1 scan cycle) when paired in dual-CPU configuration; eliminates process upsets during CPU faults.
- V-net Integration — Native compatibility with Yokogawa CENTUM V-net backbone; no protocol gateway required for FCS-to-HIS or FCS-to-FCS communication.
- Drop-in Replacement — Pin-compatible with CP451-51 (S1); allows hot-swap maintenance without FCS reconfiguration or process shutdown.
- Long-term OEM Support — Yokogawa maintains spare parts availability for CENTUM CS3000 through extended lifecycle programs, reducing obsolescence risk.
Complete System Bill of Materials
The CP451-51 S2 operates within a CENTUM FCS station. A typical redundant FCS node BOM includes:
- CP451-51 S2 × 2 (primary + redundant CPU pair)
- EB401 / EB501 — FCS Nest / Expansion Bus Unit
- PW481 — Power Supply Module (24 VDC)
- ALR111 — Alarm & Status Module
- AAI141 / AAI841 — Analog I/O Modules (4–20 mA)
- ADV151 / ADV551 — Digital I/O Modules
- ACM12 — Communication Module (for Modbus/HART gateway)
- V-net Coaxial Cable & Terminators
- CENTUM CS3000 Engineering Workstation (EWS) License
Contact support@konmask.com for complete station BOM quotations and compatibility verification.
Compliance & Industry Standards
- CE Marking — EMC Directive 2014/30/EU; Low Voltage Directive 2014/35/EU
- UL / cUL Listed — Industrial control equipment per UL 508
- IEC 61511 — Functional Safety (SIL-capable architecture when configured with Yokogawa ProSafe-RS SIS)
- IEC 61131-3 — Compliant control logic execution environment
- RoHS 2 (2011/65/EU) — Restriction of hazardous substances compliant
- ATEX / IECEx — Control room (Zone 2 barrier) installation; field devices require certified barriers
Quality Assurance & Sourcing
- Authentic OEM Hardware — All units sourced from authorized Yokogawa distributors or verified surplus channels with full traceability documentation.
- Pre-shipment Inspection — Each module undergoes visual inspection, label verification, and firmware revision confirmation before dispatch.
- Anti-counterfeit Verification — Serial numbers cross-referenced against Yokogawa OEM records where applicable.
- Packaging — ESD-safe anti-static bag + foam-lined carton; humidity indicator card included for long-haul freight.
- Warranty — 90-day functional warranty against DOA defects; extended warranty available upon request.
- Lead Time — In-stock units ship within 3–5 business days; sourced units 2–4 weeks depending on availability.
How to Source This Part
- Confirm Compatibility — Verify your FCS station nest type (EB401/EB501) and existing CPU revision before ordering. Share your station model with our team if unsure.
- Request a Quote — Email support@konmask.com or call +0086 19859288691 with your required quantity and delivery timeline.
- Receive Proforma Invoice — We issue a detailed PI with part number, revision, unit price, and shipping terms (EXW Xiamen / CIF destination).
- Order Confirmation & Payment — T/T bank transfer, PayPal, or trade assurance accepted. Order locked upon payment confirmation.
- Shipment & Tracking — DHL / FedEx / SF Express with real-time tracking number provided within 24 hours of dispatch.
- After-sales Support — Technical commissioning guidance available via email or video call with our automation engineers.
Application-Specific FAQ
Q: Can the CP451-51 S2 replace an S1 revision without reprogramming?
A: Yes. The S2 is a drop-in hardware replacement for the S1. No FCS database changes or re-download are required; simply swap the module with the station powered down (or hot-swap in redundant configurations).
Q: Is this module compatible with CENTUM VP?
A: No. The CP451-51 S2 is designed for CENTUM CS and CS3000 platforms. CENTUM VP uses a different CPU architecture (CP461 series). Contact us to discuss migration path options.
Q: Can we run dual-redundant CPUs with one S1 and one S2?
A: Yokogawa recommends matching revisions in a redundant pair. Mixed-revision pairing may function but is not officially supported and could affect bumpless switchover behavior.
Q: What is the maximum number of I/O points this CPU can manage?
A: Within a single FCS, the CP451-51 supports up to 2,048 I/O points (hardware-dependent on nest and I/O module configuration). Consult the CENTUM CS3000 system engineering guide for exact limits.
Q: Do you provide a test report or incoming inspection certificate?
A: Yes. A pre-shipment inspection report is available upon request. For critical plant applications, we recommend your site team perform incoming functional verification using a spare nest.
Q: What are your export compliance obligations for this product?
A: Industrial automation controllers may be subject to export control regulations (EAR/ECCN or equivalent). Buyers are responsible for compliance with their local import regulations. Konmask provides accurate HS codes and country-of-origin documentation to support customs clearance.
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Contact: support@konmask.com | +0086 19859288691
