ICS TRIPLEX TC-303-03-xmx Remote Expansion Cable (UL)

The Trusted CI provides the Trusted System with an intelligent Communications Interface,

acting as a relay between the Processor, other Trusted Systems, the Engineering Workstation

and third-party equipment.

Hardware

The module has a Power PC Processor. Bootstrap software is stored on Erasable

Programmable Read Only Memory (EPROM). Operational firmware is stored in flash memory

and may be upgraded via the Front Panel Port.

The Trusted Operating System is used on both the TMR Processor and CI. The real time

kernel is a high speed, high functionality kernel made for fault tolerant distributed systems.

The kernel provides basic services (such as memory management) and interference free

software environments.

A module watchdog monitors processor operation and the power supply unit (PSU) output

voltages.

The module is supplied with a dual redundant +24 Vdc power feed from the chassis

backplane. An on-board power supply unit provides voltage conversion, supply conditioning

and protection.

The Trusted CI communicates with the Trusted TMR Processor via the triplicated Inter

Module Bus. When polled by the Trusted TMR Processor, the module’s bus interface votes

the data 2 out of 3 (2oo3) from the Inter-Module Bus and transmits back its reply via all

three Inter-Module Bus channels. The remainder of the Communications Interface is

simplex.