Product Core Brief
- Model: CP471-01
- Brand: YOKOGAWA
- Series: CENTUM CS 3000 / Field Control Unit (FCU)
- Core Function: Executes process control logic as the main CPU for CENTUM CS 3000 field control stations.
- Product Type: DCS Processor Module
- Key Specs: For AFV30/AFV40/A2FV50/A2FV70 | Requires EC401 S3 or later | Supports dual-redundant online replacement
- Condition: New Surplus / OEM Original
Key Technical Specifications
- Part Number:
- Product Type: Processor Module for Field Control Unit
- Compatible FCU Types: AFV30, AFV40, A2FV50, A2FV70
- Required ESB Bus Coupler: EC401, style code S3 or later
- Redundancy Support: Dual-redundant configuration supported
- Online Replacement: Supported in dual-redundant setup
- CP461 Coexistence: Not allowed in dual-redundant pair
- CP461 Upgrade Requirement: Control Function software R6.05 or later
- Weight: Approx. 700 g
- Explosion Protection: None (standard industrial installation)
- Mounting: FCU backplane slot
Product Introduction
This module serves as the central processor for YOKOGAWA CENTUM CS 3000 field control units. It runs control strategies, manages ESB bus communication, and maintains deterministic execution for continuous and sequential process control in chemical, refining, and power applications.
Its main advantage is drop-in compatibility with existing AFV-series FCUs while supporting dual-redundant online replacement. That means you can swap a failed processor without a full station shutdown, provided the redundancy and EC401 requirements are met.
QA & Testing SOP
- Visual & counterfeit inspection: Check part number label, PCB revision, connector condition, and ESD bag integrity.
- Backplane pin check: Inspect FCU connector pins for bending, corrosion, or foreign material before insertion.
- Cold-boot test: Install into a verified FCU rack, apply power, and confirm processor initialization and status LEDs.
- Firmware/identity logging: Record visible firmware or identity data if accessible; flag units that fail to initialize.
- Redundancy readiness check: Verify compatibility with EC401 S3 or later and confirm the unit is not mixed with CP461 in a redundant pair.
All units are handled with ESD-safe packaging and labeled with received condition, inspection date, and test status.
Installation Pitfalls & Guide
- ❗ Do not mix CP461 and CP471 in one redundant pair. A dual-redundant configuration must use matched processors.
- ❗ Check the EC401 style code. CP471-01 requires EC401 style S3 or later; older couplers may prevent proper operation.
- ❗ Upgrading from CP461 is not a field task. Replacement of CP461 with CP471 must be performed by authorized service personnel and requires Control Function R6.05 or later.
- ❗ Protect the backplane connector. Bent pins or contaminated contacts are the most common cause of no-boot issues after replacement.
Replacement steps:
- Confirm FCU type, EC401 style code, and redundancy status.
- Remove the failed processor following ESD procedures.
- Seat the new module firmly and verify connector alignment.
- Power on, check status indicators, and confirm control execution before returning to full service.
Technical FAQ
Is this compatible with my existing CENTUM CS 3000 FCU?
Yes, if your field control unit is AFV30, AFV40, A2FV50, or A2FV70 and the EC401 bus coupler is style S3 or later.
Can I replace only one processor in a redundant pair?
Only if both processors are CP471. You cannot run a mixed CP461/CP471 redundant pair.
Can I upgrade from CP461 myself?
No. Yokogawa requires authorized service engineers for CP461-to-CP471 migration, and the station software must be R6.05 or later.
What condition are surplus units in?
Surplus stock is visually inspected, connector-checked, and power-tested where a suitable test rack is available. Any known limitations are disclosed before shipment.
Do you offer warranty and documentation support?
Yes. Warranty terms, lead time, and available photos or test notes are confirmed per lot. For critical replacements, request serial-level confirmation before purchase.
