Product Description

The Yokogawa SCP451-51 is a high-reliability processor module engineered for use in the ProSafe-RS Safety Instrumented System (SIS). Designed for mission-critical safety applications, this module ensures industrial processes enter a fail-safe state during emergencies. It is TÜV-certified to meet SIL 3 requirements and features specialized protection against corrosive environments via ISA Standard G3 conformal coating.

This processor module integrates seamlessly with Yokogawa’s distributed control systems while maintaining strict safety isolation, providing robust control for Emergency Shutdown (ESD), Fire & Gas (F&G), and other high-risk applications.

Technical Specifications

System & Processor

• System Platform: ProSafe-RS SIS

• Processor: MIPS R5000 64-bit RISC CPU

• Memory: 32 MB ECC-protected RAM, NVRAM and Flash for program and data retention

Communication & Network

• Control Network: Vnet/IP, 100 Mbps, Full Duplex

• Ports: RS232, RS485, Ethernet

• Inter-SCS Communication: Supports high-speed safety messaging

• Sequence of Events: High-resolution time-stamped event logging

Power & Electrical

• Input Voltage: 5V DC

• Current Consumption: 850 mA

• Power Consumption: 4.25 W

• Supported Signals: DC Voltage, DC Current, Thermocouple, RTD, Resistance

Environmental & Mechanical

• Operating Temperature: -20°C to +60°C (Standard)

• Conformal Coating: G3 standard for corrosive gas protection

• Redundancy: Supports dual-redundant configurations

Hardware Variants

• SCP451-5: Standard environment

• SCP451-F: Wide temperature range with fan (up to 70°C)

• Suffix “1”: G3 coating for chemical or refinery applications

Functional Highlights

• Runs safety-certified OS with continuous CPU and memory self-diagnostics

• Immediate recovery after power loss via non-volatile memory

• Ensures safety-first operation across integrated DCS and SIS networks

• Supports post-incident analysis with detailed event sequencing

Applications

The SCP451-51 module is ideal for:

• Oil & gas process safety systems

• Chemical and petrochemical plant emergency shutdown systems

• Fire & Gas detection and control

• Any SIL 3-rated safety-critical automation

FAQ

Q: Can the SCP451-51 operate in high-temperature environments?
A: Yes, standard type operates up to 60°C; use SCP451-F variant for up to 70°C.

Q: Is the module compatible with existing ProSafe-RS stations?
A: Yes, ensure the “Style” code matches your existing safety nodes for firmware compatibility.

Q: Does the module support redundancy?
A: Yes, dual-redundant configuration is supported for high availability.

Q: What protection does the G3 coating provide?
A: It shields the module against corrosive gases such as sulfurous or chlorine compounds in industrial environments.