ICS Triplex T8225 Power Supply Modules

In no event will Rockwell Automation be responsible or liable for indirect or consequential

damages resulting from the use or application of this equipment. The examples given in this

manual are included solely for illustrative purposes. Because of the many variables and

requirements related to any particular installation, Rockwell Automation does not assume

responsibility or reliability for actual use based on the examples and diagrams.

No patent liability is assumed by Rockwell Automation, with respect to use of information,

circuits, equipment, or software described in this manual.

All trademarks are acknowledged.

DISCLAIMER

It is not intended that the information in this publication covers every possible detail about

the construction, operation, or maintenance of a control system installation. You should also

refer to your own local (or supplied) system safety manual, installation and

operator/maintenance manuals.

REVISION AND UPDATING POLICY

This document is based on information available at the time of its publication. The

document contents are subject to change from time to time. The latest versions of the

manuals are available at the Rockwell Automation Literature Library under “Product

Information” information “Critical Process Control & Safety Systems”.

Overview

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.