ICS Triplex


Fault Tolerant Control Systems

Trusted is a Triple Modular Redundant (TMR) controller designed to provide maximum safety and availability in all circumstances. Trusted incorporates a fault-tolerant architecture to virtually eliminate spurious system trips and provides high availability as part of its inherent safety-related functionality.

The Trusted TMR design uses a majority voting process to identify the source of a fault. Random hardware failures will cause one of three process control 'slices' to react differently to the others. This discrepancy will be captured and reported by the voting system. The Trusted TMR system will always react immediately to control system faults helping to ensure it meets the user's safety integrity requirements.

  • Trusted™
  • I/O Modules
  • Specialty Modules
  • Power Supplies
  • Features
  • Certifications

Trusted™ Controller

Trusted is a highly compact solution; you can fit 240 TMR I/O channels in a single Trusted controller chassis, including a spare processor, dual Ethernet and multiple serial communications capability. At the heart of each Trusted system is the controller chassis housing the TMR processor (and a companion slot for a spare processor) and eight slots for I/O modules, communications modules or interface modules to connect to expander chassis.

Trusted™ Expander

Trusted can connect up to 27 I/O expander chassis, each housing up to 12 I/O modules ( a maximum 138 I/O modules being supported). The expander chassis may be located up to 10km away and are connected to the controller processor chassis by triplicated 250Mbit/sec fiber optic links.