Rockwell Automation T8311 Trusted Expander Interface - Manual (Page 11)

Trusted
TM
Module T8311
Issue 12 Mar 07 PD-T8311 11
2.2.1. Module Replacement
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.
In Hot-standby configurations, with both Expander Interface Modules installed, the faulted module may
be either the active or the standby module. In most cases the system will automatically switch to the
healthiest module, therefore only the standby module will require replacement. To replace the active
module follow the steps described above. To replace the standby module:
1. Release both the top and bottom ejectors tabs on the standby module using the ejector
release tool.
2. Ensure that the other module is indicating the active mode of operation.
3. Remove the standby module.
In Hot-standby configurations, the replacement module should then be installed in the position where
the previous module was removed. This module will become the standby module.