ICS TRIPLEX T8311

Description

Introduction
The TrustedTM TMR Expander Interface module resides in the TrustedTM Controller Chassis and
provides the ‘master’ interface between the Inter-Module Bus (IMB) in the Controller Chassis and the
Expander Bus. The Expander Bus allows multiple chassis systems to be implemented using UTP
cable connections whilst maintaining the fault tolerant, high bandwidth IMB capabilities.
The module provides fault containment for the Expander Bus, the module itself and the IMB in the
Controller 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
slot 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.
The Expander Interface Modules may reside in any of the I/O slots within the Controller Chassis. The
modules are installed in pairs with the left-hand module occupying an odd numbered slot. The
Expander Interface must NOT be installed in these other module locations, as this may cause
damage to the module.
The two Interface slots must be interconnected using the Expander Interface Adaptor Unit T8312.
The Expander Interface Modules are connected to the Expander Processor Modules by the Expander
Interface Hot Link Cable TC-301 via the TrustedTM Expander Interface Adaptor Unit T8312.
The connection to remote Expander Chassis is via the TrustedTM Fibre Optic Tx/Rx Unit using the
Expander Interface Adaptor to Fibre Tx/Rx Unit (Remote Expanders) Cable TC-302.

The replacement module must be inserted in to the vacant processor slot, ensuring that the module is
correctly located and the ejector tabs are closed (see 2.2). The newly installed module will perform its
power-up sequence.
Ensure that the LED indicators on the newly installed module are as follows:
LED 1 Healthy A Steady Green
LED 2 Healthy B Steady Green
LED 3 Healthy C Steady Green
If the original module has reported faults, the TMR Processor may automatically initiate the
changeover to the newly installed module. Manual changeover may be initiated either using the ejector
tabs on the original module or using commands via the diagnostic interface. To initiate the changeover
using the ejector tabs use the following sequence:
1. Release both the top and bottom ejector tabs on the original module using the ejector release
tool. DO NOT remove the module.
2. Wait until the original module indicates that it is in the standby mode of operation and the
newly installed module is in the active mode.
3. Remove the original module.
Note: Under no circumstances remove a module that is indicating ACTIVE mode. Removal of an
active module may result in modules within the chassis adopting their default (shutdown) state,
and initiate shutdown states via the application program.