Trusted TMR Expander Processor 

Product Overview 

The Trusted® TMR Expander Processor Module resides in the processor slots of the Trusted 

Expander Chassis and provides the ‘slave’ interface between the Expander Bus and the Expander 

Chassis Backplane. The Expander Bus allows multiple chassis systems to be implemented using 

Unshielded Twisted Pair (UTP) cable connections whilst maintaining the fault tolerant, high 

bandwidth Inter-Module Bus (IMB) capabilities. 

The Module provides fault containment for the Expander Bus, the Module itself and the Expander 

Chassis, ensuring that the effects of these potential faults are localised and system availability 

maximised. The Module is fault tolerant with HIFT TMR architecture. Comprehensive diagnostics, 

monitoring and testing provide rapid fault identification. Hot-standby and module spare 

configurations are supported, allowing automatic and manual repair strategies 

Features: 

• Triple Modular Redundant (TMR), fault tolerant (3-2-0) operation. 

• Hardware Implemented Fault Tolerant (HIFT) architecture. 

• Dedicated hardware and software test regimes which provide very fast fault recognition and 

response times. 

• Automatic fault handling without nuisance alarming. 

• Hot replacement. 

• Front Panel indicators that show module health and status.