The YOKOGAWA SSC10D is a Safety Control Unit (SCU) designed to implement safety functions in dual-redundant systems. It meets the highest safety standards (IEC 61508 SIL 3) and ensures reliable performance across various industrial sectors, including process control, machine control, and power generation.

Technical Specifications

• Safety Standard: IEC 61508 SIL 3
• Design: Dual-redundant architecture for enhanced reliability
• Modularity: Easy configuration and expansion with a modular design
• Communication Interfaces: Multiple interfaces for system integration
  • V Net Interface: Dual-redundant
  • ESB Bus Interface: Dual-redundant
• Power Consumption: Low, promoting energy efficiency
• Operating Temperature Range: Wide range, ensuring reliable operation in diverse environments
  • Fan Unit: Included for high-temperature applications (ambient temperature exceeding 50°C)

Processor and Memory

• Processor: MIPS R5000 processor for efficient performance
• Main Memory Capacity: 32 MB
• Memory Protection in Case of Power Failure:
  • Battery: Protects main memory during power failure
  • Protection Time: Up to 3 years at 30°C or below (within battery pack lifetime, not rechargeable)

I/O Modules and Node Connections

• Connecting Safety Node Units: Up to nine safety node units per safety control unit. ESB bus coupler modules (SEC401) must be installed in the 7th and 8th slots for installation.
• Number of I/O Modules Mounted:
  • Per Safety Control Unit: Up to 8 I/O modules
  • Per SCS (Safety Control System): Up to 78 I/O modules

IRIG Interface

• Communication Interface: RS-422
• Time Code: IRIG-B000
• Frame Time: 1 second
• Bit Time: 10 ms