YOKOGAWA CP345 – Processor Module for CENTUM FCS Control

The YOKOGAWA CP345 is a controller processor module typically used in CENTUM series Field Control Stations (FCS) as the primary execution CPU. From my experience, plants use the CP345 when they need steady, deterministic control and a straightforward replacement path for existing racks. It seems to be most valued in brownfield upgrades where you want to keep your I/O and wiring untouched while restoring controller performance and system uptime.

You might notice that the CP345 is often installed in redundant pairs. That way, a switchover can occur automatically if one side trips, keeping the DCS running without a process disturbance. In many cases this single-slot module slots back into the existing baseplate, draws power from the backplane, and requires only configuration/firmware alignment with the running system before cutover.

Company’s Order Placement Process and Guarantees

• Warranty: 365 days
• Delivery time: 1 week for in-stock items; no more than one month at the latest
• Payment method: 50% advance payment, full payment for delivery
• Express delivery: FedEx, UPS, DHL
• Every unit is inspected and securely packed before dispatch; we share photos and basic power-on checks upon request.

Key Features

• Deterministic Control Execution – Designed to execute control strategies consistently in process applications.
• Redundancy-Ready Architecture – Typically used in dual-redundant pairs; enables automatic switchover to maintain availability.
• Backplane-Powered – Draws power via the system rack backplane; no external wiring to the module face.
• System Diagnostics – Front-panel status indicators and onboard diagnostics make it easier to confirm health and troubleshoot.
• Stable Lifecycle Support – Suited for maintenance spares and phased modernizations without reworking field wiring.
• Firmware/Configuration Management – Supports revision-aligned firmware; match to station software for smooth commissioning.

Technical Specifications

Brand / Model	YOKOGAWA CP345
Product Type	Controller Processor Module for CENTUM FCS
HS Code	8537.10 (Boards/panels for electric control or distribution)
Power Requirements	Backplane supplied (typically 5 V DC nominal via the system rack)
Operating Temperature	0 to 55 °C; 5–95% RH non‑condensing (typical DCS cabinet environment)
Dimensions & Weight	Single‑slot plug‑in module; approx. 0.5 kg (varies by revision)
Signal I/O Types	No direct field I/O; executes control logic and communicates over system bus
Communication Interfaces	Backplane system bus; station/network connectivity provided by the FCS network interface (e.g., Vnet/Vnet‑IP depending on station)
Installation Method	Plug‑in to FCS baseplate/rack; secured with front fasteners; ESD‑safe handling recommended

Note: Compatibility and exact parameters can vary by system generation and suffix code. We typically confirm your station model, firmware revision, and redundancy setup before shipment to avoid mismatch.

Application Fields

Common in continuous and batch process industries where stable control is non‑negotiable:

• Oil & Gas (upstream well pads, midstream compressor stations, downstream refining units)
• Chemicals & Petrochemicals (reactors, distillation, utilities)
• Power Generation (boiler controls, BOP auxiliaries)
• Water & Wastewater (filtration, clarifiers, pumping stations)
• Pulp & Paper, Food & Beverage, and other continuous process lines

“We used CP345 as a drop‑in to restore a redundant controller pair on a reformer unit. Switchover tests were clean, and we kept the original I/O marshaling intact.” — Maintenance Manager, power & utilities customer

Compatible & Supporting Components

To build or service a complete FCS node around CP345, you typically pair it with:

• FCS Baseplate/Rack and Power Supply – Provides mechanical slot, backplane power, and system bus.
• Network Interface (Vnet/Vnet‑IP) – Connects the controller to the control network and engineering station.
• FIO/Remote I/O Modules – For example, AAI series (analog inputs), AAO series (analog outputs), ADV series (digital inputs), and ADO series (digital outputs). Exact part codes depend on your system generation and channel counts.
• Redundancy Pair – A matched CP345 with the same hardware/firmware revision when redundant control is required.

If you share your station type and suffix codes, we can verify module‑level compatibility (including firmware matrices) before you order.

Advantages & Value

• Reliability – Proven in long‑run process units; redundancy support reduces unplanned downtime.
• Compatibility – In most cases, integrates with existing CENTUM FCS racks and I/O without rewiring.
• Cost Control – Keeps your installed base viable; avoids a full rip‑and‑replace migration.
• Technical Support – We help align hardware revisions and firmware, and share commissioning notes to shorten outage windows.

Installation & Maintenance

• Cabinet & Environment – Install in a clean, ventilated 19‑inch control cabinet or OEM enclosure. Maintain ambient within 0–55 °C and non‑condensing humidity.
• Mounting – Power down or follow your site’s redundancy procedure; insert into the designated slot; fasten the front panel screws; observe ESD precautions.
• Wiring – No field wiring to the CP345 front; ensure backplane connectors are fully seated and the rack power supply is stable.
• Commissioning – Match firmware to the running station; load controller configuration; perform redundancy switchover tests if applicable.
• Routine Maintenance – Quarterly visual checks, dust removal with dry air, verify LED statuses. Review firmware release notes annually and keep a known‑good backup of the project database.

Quality & Certifications

• Typical compliance: CE and UL for industrial control equipment
• RoHS conformity for hazardous substance restrictions (where applicable)
• Manufacturer quality system: ISO 9001
• Warranty: 12 months from delivery

One thing I appreciate is how predictable the CP345 behaves when you align the firmware and pair it correctly in redundant mode. If you can share your existing station type and firmware levels, we’ll validate the exact CP345 suffix before we quote, so you receive a unit that lands and runs without surprises.