ICS Triplex T8311 Trusted TMR Expander Interface Module

Description

The ICS Triplex T8311 is a high-integrity Expander Interface module designed to facilitate the extension of the Trusted Triple Modular Redundancy (TMR) system. It acts as the critical bridge between the Controller Chassis and Expansion Chassis, maintaining the triplicated bus architecture across multiple racks for large-scale safety applications.

Specifications

• Manufacturer: Rockwell Automation (ICS Triplex).

• Country of Origin: United Kingdom.

• Model Number: T8311.

• Input Voltage: 24 VDC nominal (20–32 VDC range).

• Power Consumption: 20 Watts maximum.

• Interface Bus: Triple Redundant Inter-Module Bus.

• Physical Weight: Approximately 1.1 kg (2.4 lbs).

• Dimensions: 10.5" x 1.2" x 7.8" (266 mm x 31 mm x 198 mm).

• Isolation: 500 VDC between bus and logic.

• Safety Rating: TÜV certified for SIL3 safety instrumented systems.

Features

• Triplicated Signal Integrity: Ensures that the fault-tolerant voting logic of the TMR system is preserved across expansion cables and distant chassis.

• Chassis Extension Support: Allows the connection of up to eight expansion racks to a single main processor set for high-density I/O requirements.

• Fault Isolation: Prevents electrical or communication failures in an expansion rack from propagating back to the main controller.

• Hot Replacement Capability: Supports module swapping while the system is under power, ensuring zero interruption to the safety function.

• Synchronized Data Transfer: Maintains deterministic timing for all expansion I/O signals to ensure consistent logic scan intervals.

• Comprehensive Diagnostics: Continuously monitors cable integrity and internal module health, with real-time reporting via front-panel LEDs.