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- Yokogawa
- SCP451-51
- Processor Module
- Japan
- 123 mm × 122 mm × 100 mm
- 1.2kg
- Xiamen, China
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📘 Product Overview – SCP451-51
The SCP451-51 is a central processor module used within safety control systems, particularly as part of the ProSafe-RS series. It serves as the backbone of system logic execution, communication, and redundancy management. Designed to meet strict reliability and availability demands, this module is ideal for applications requiring SIL-level safety, continuous uptime, and robust communication across critical systems.
As a controller interface and logic core, the SCP451-51 coordinates with I/O modules, performs internal safety computations, and ensures real-time performance even under fault conditions.
📊 Technical Specifications – SCP451-51
| Parameter | Specification |
|---|---|
| Model | SCP451-51 |
| Function | Central Logic Processor / Control Module |
| Role | Controls system logic and manages safety system communication |
| Architecture | Redundant (Hot-Standby) Support |
| Memory | 128 MB RAM, 64 MB Non-Volatile Flash |
| Internal Diagnostics | Watchdog timer, memory parity check, logic scan monitoring |
| Supported Bus | Vnet/IP, ESB Bus |
| Communication Ports | Ethernet, Serial (RS-232/RS-485), Optical (Vnet) |
| Logic Execution Cycle | Typically <100 ms |
| Mounting | System rack mount (ProSafe-RS cabinet) |
| Operating Voltage | 24 V DC (via backplane) |
| Operating Temperature | –10°C to +55°C |
| Storage Temperature | –40°C to +85°C |
| Relative Humidity | 5% to 95% RH, non-condensing |
| Vibration Resistance | 2.5 G, 10–500 Hz |
| Shock Resistance | 10 G, 11 ms |
| Dimensions (H × W × D) | 123 mm × 122 mm × 100 mm |
| Weight | 1.2 kg |
| Protection Class | IP20 (front panel), Internal installation |
| Certifications | Designed for SIL-3 compliant systems |
🏭 Applications
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Emergency Shutdown (ESD) Systems – Executes fail-safe logic for critical plant shutdowns
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Fire and Gas (F&G) Detection Systems – Coordinates sensor inputs and actuator outputs
-
High-Integrity Pressure Protection (HIPPS) – Ensures valves act before pressure limits are breached
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Burner Management Systems (BMS) – Manages complex burner interlock sequencing
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Critical Alarm Systems – Facilitates safe plant notification and alarm signaling under system failures
✅ Product Advantages
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Redundant Design – Supports dual configuration for zero system downtime
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SIL-3 Compatibility – Meets the highest safety integrity requirements in process industries
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Fast Logic Execution – Real-time responsiveness for critical safety applications
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Built-in Diagnostics – Monitors system health and alerts operators before failure occurs
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Modular Integration – Easily installable in ProSafe-RS racks with other I/O modules
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Flexible Communication – Seamlessly integrates with fieldbus and control networks
🏷️ Brand & Series
| Field | Description |
|---|---|
| Brand | Yokogawa |
| Series | ProSafe-RS |
| Product Type | Processor Module for Safety Systems |
🔁 Related Models (Same Series or Functional Category)
| Model | Description | Key Specs |
|---|---|---|
| SCP451-11-S1 | Safety logic processor module | 1.4 kg, 123×122×100 mm, SIL-3 certified |
| SCP451-53 | Analog output module | 4 channels, 12-bit resolution, 1.5 kg |
| SCP451-DI | Digital input module | 16 channels, isolated, ~1.4 kg |
| SCP451-DO | Digital output module | 16 channels, fast switching, 1.4 kg |
| SCP451-AI | Analog input module | 4/8 channels, high accuracy, 1.6 kg |
🔝 Popular Yokogawa Modules (Other Categories)
| Model | Description | Key Specs |
|---|---|---|
| CP701 | Field control CPU module | High-speed logic processing, 1.7 kg |
| ADV151-P00 | Digital output module | 16 outputs, robust I/O switching, 0.9 kg |
| ANB10D-420 | Remote I/O node | Network-based expansion, 1.2 kg |
| VI702 | Network interface module | Vnet/IP connectivity, 0.6 kg |
| EC401-51 | I/O bus coupler | For expansion and I/O distribution, 1.1 kg |
❓ FAQ (10 Q&A)
Q1: What does the SCP451-51 module do?
A1: It operates as the central processor in a safety system, executing logic, managing communication, and overseeing I/O modules.
Q2: Is the SCP451-51 compatible with redundant systems?
A2: Yes, it is designed to support hot-standby redundancy for high availability and failover operation.
Q3: What is the operating temperature range of this module?
A3: The module functions reliably between –10°C to +55°C, suitable for most industrial environments.
Q4: How is the SCP451-51 mounted?
A4: It is mounted in a system rack, typically within a ProSafe-RS cabinet.
Q5: What kind of communication does it support?
A5: It supports Vnet/IP, Ethernet, RS-232/RS-485 serial interfaces, and backplane communication via ESB Bus.
Q6: Can the SCP451-51 be used in SIL-3 certified systems?
A6: Yes, it is designed to meet the functional safety requirements up to SIL-3.
Q7: Does this module include diagnostics?
A7: Yes, it has internal diagnostics such as watchdog timers, memory checks, and fault monitoring.
Q8: Is it compatible with digital and analog I/O modules?
A8: Absolutely. It serves as the controller for both digital and analog input/output modules in the system.
Q9: What happens in case of processor failure?
A9: In redundant configurations, the standby processor takes over without interrupting operation.
Q10: What are the dimensions and weight?
A10: The module measures 123 × 122 × 100 mm and weighs approximately 1.2 kg.