Rockwell Automation T8449 Trusted TMR 24V dc Valve Monitor Module - 40 Channel - Manual (Page 41)

Trusted
TM
Module T8449
Issue 13 Apr 10 PD-T8449 41
connects both slots to common field wiring terminations. During normal operations, the primary slot contains the
Active module as indicated by the Active indicator on the front panel of the module. The secondary slot is
available for a spare module that will normally be the Standby module as indicated by the Standby indicator on
the front panel of the module.
Depending on the installation, a hot-spare module may already be installed, or a module blank will be
installed in the Standby slot. If a hot-spare module is already installed, transfer to the Standby module
occurs automatically when a module fault is detected in the Active module. If a hot-spare is not
installed, the system continues operating from the Active module until a spare module is installed.
5.5. SmartSlot
For a SmartSlot configuration, the Secondary slot is not unique to each Primary slot. Instead, a single
secondary slot is shared among many primary slots. This technique provides the highest density of
modules to be fitted in a given physical space. At the rear of the Trusted
TM Chassis, a single-wide I/O
Interface Cable connects a primary slot to a unique Trusted
TM
Termination Assembly. The Trusted
TM
Termination Assembly has a SmartSlot Link Connector that is used for temporary connection to the
shared SmartSlot in the Trusted
TM Chassis.
When a primary module has a failure and requires replacement, a second I/O Interface Cable is
temporarily installed between the SmartSlot Link Connector on the associated Trusted
TM Termination
Assembly and the SmartSlot in the Trusted TM Chassis. With a spare module installed in the SmartSlot
and connected to the Trusted TM Termination Assembly, the SmartSlot can be used to replace the failed
primary module.
Output module Smart Slot jumper cable TC-308-02.
Smart Slot between chassis can be performed if the chassis are version 2 (or higher). These have the
connector fitted to enable connection of a TC-006 that ensures the 0 Volt of each chassis is at the
same potential.
5.6. Cold Start
If an I/O module has shut down (due, for example, to two existing faults), the three Healthy LEDs will
be red, the Active and Standby LEDs will be flashing red and the Educated LED will be flashing amber.
The I/O functions provided by this module will have been lost if a hot swap partner has not taken over
control. The module can only be restarted by removing it from its slot and re-inserting it.
If an I/O module is inserted into a functional system slot which previously had no active module (e.g.
removing and reinserting as above), then the processor will educate the module once it has booted.
Once educated, the Educated LED will be steady green and the Active LED will be red flashing.
Input modules will now be reading and reporting their inputs. Output modules have not yet energised
their outputs. To activate outputs and to set the module’s Active LED and the processor’s System
Healthy LED steady green, press the processor Reset pushbutton.