Description
YOKOGAWA CP451‑51 Processor Module
Product Overview
CP451‑51 is a high‑performance field control processor module for Yokogawa CENTUM VP DCS system. It serves as the core computing unit for AFV300 / AFV400 Field Control Units (FCU), executing real‑time control logic, PID loops, sequence control and interlock functions. The‑51 variant features ISA‑G3 conformal coating for corrosive gas environments, supporting simplex or dual hot‑standby redundant configuration for high‑availability process plants. It communicates via Vnet/IP control network and ESB bus for local and remote I/O connection.
CP451-51
Core Technical Specifications
| Item | Parameter |
|---|---|
| Part Number | CP451‑51 |
| Applicable System | Yokogawa CENTUM VP, FCU AFV300, AFV400 |
| Environmental Grade | ISA‑G3 conformal coating (anti‑corrosive atmosphere) |
| Redundancy Mode | Simplex / Dual hot‑standby bumpless switch‑over |
| Processor | 32‑bit high‑speed RISC architecture |
| On‑board Bus | ESB bus for local I/O; ER bus for remote I/O; Vnet/IP (10/100BASE‑TX) |
| Max I/O Capacity | Supports up to 256 I/O tags per FCU |
| Power Supply | Powered from FCU rack backplane |
| Operating Temperature | 0 °C ~ +50 °C |
| Storage Temperature | −40 °C ~ +70 °C |
| Humidity | 5‑95 % RH, non‑condensing |
| Mounting | Plug‑in slot inside AFV series FCU rack |
| Weight | Approx. 1.0 kg |
| Certifications | CE, UL, CSA for industrial process control |
| Cooling | Natural convection cooling, no fan required |
Main Features & Advantages
- ISA‑G3 Conformal Coating: Enhanced protection against sulphide, chloride and corrosive airborne contaminants, suitable for pulp‑paper, offshore and chemical harsh environments.
- Seamless Dual Redundancy: Hot‑standby redundant CP451‑51 pair achieves bumpless switch‑over without process disturbance when one processor fails or undergoes maintenance.
- Deterministic Real‑time Execution: Stable cycle time for PID, cascade, ratio, feed‑forward and complex interlock logic for process‑critical loops.
- Multi‑layer Communication Infrastructure: Native Vnet/IP for DCS control network; ESB bus for local I/O; ER bus for distributed remote I/O nodes, flexible system expansion.
- Rich Built‑in Diagnostics: On‑board LED status indicators; system alarm reporting within CENTUM VP operator station for fast fault location.
- Hot‑swap capability: Module can be replaced online under redundant FCU configuration without system shutdown.
- Wide Compatibility: Works with FIO‑series I/O modules, gateway modules and third‑party fieldbus interfaces within CENTUM VP ecosystem.
- Long‑term spare‑part availability: Widely deployed legacy field controller for plant retrofit and system modernization projects.
Application Scenarios
- Oil & gas processing plants, refineries and petrochemical production units requiring high‑availability DCS control.
- Pulp and paper mills, corrosive‑atmosphere industrial sites leveraging ISA‑G3 coated hardware.
- Power plant auxiliary control, boiler and turbine auxiliary monitoring & regulation.
- Water & wastewater treatment, chemical batch & continuous process control.
- Brown‑field retrofit & migration projects for existing CENTUM VP installations.
- Heavy‑industry manufacturing where dual‑redundant FCU is mandatory for process safety continuity.
CP451-51
Related Recommended Models (8+ items)
- CP451‑11: Standard‑grade processor, non‑G3 coating, predecessor model of CP451‑51
- CP461‑51: Higher‑performance G3 coated processor for large‑scale FCU with heavy logic load
- AFV40D‑S1: Dual‑redundant FCU base rack for ‑51 redundant deployment
- AFV30A‑S1: Simplex FCU base rack for single ‑51 installation
- ALR121‑S01: ESB bus repeater for remote I/O expansion
- ACG10‑S00: Vnet/IP communication gateway for system interconnection
- SCP451‑51‑S1: Safety‑enhanced variant for ProSafe‑RS integrated setup
- PW482‑10: FCU power supply module matching AFV300 / AFV400 racks
- SB401‑10: ESB bus interface unit for connecting FIO I/O racks
FAQ – Frequently Asked Questions
Q1: What is the difference between ‑11 and ‑51?
A: ‑51 is equipped with ISA‑G3 conformal coating for corrosive gas environments; ‑11 is standard non‑coated version for general indoor control rooms. Their logic performance and pin‑to‑pin compatibility are identical.
Q2: Can ‑51 run in simplex (non‑redundant) FCU rack?
A: Yes. It supports both simplex and dual hot‑standby redundant configurations. Redundant hardware is optional for high‑reliability requirements only.
Q3: What rack hardware is required for dual‑redundant ‑51 setup?
A: AFV40D‑S1 dual FCU rack, matching redundant power supply, and proper Vnet/IP network redundancy configuration.
Q4: Does ‑51 support hot‑swap?
A: Hot‑swap is allowed only under dual‑redundant FCU configuration. In simplex mode, removing the module will stop all control execution.
Q5: Which I/O series can ‑51 connect to?
A: It works with Yokogawa FIO I/O modules via ESB / ER bus. Remote I/O racks can be extended by ESB repeaters.
Q6: Can ‑51 be used for new‑build green‑field projects?
A: It is mainly targeted for spare‑part replacement and retrofit of existing CENTUM VP sites. For brand‑new projects, higher‑generation CP461 series is recommended.
Q7: What causes RUN LED off and FAULT LED red on ‑51?
A: Common causes: rack power supply failure, corrupted control program, ESB/Vnet‑IP communication breakdown, hardware internal fault. Download project again or swap spare module for verification.
Q8: Is ‑51 compatible with older CENTUM CS3000 system?
A: No. ‑51 is designed exclusively for CENTUM VP platform, not compatible with CS3000 hardware architecture.
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