Companion Slot; Smartslot; Cold Start - Rockwell Automation Trusted TMR Manual

5. Fault Finding and Maintenance Trusted TMR 24Vdc Zone Interface Module 40 Channel

5.4. Companion Slot

For a Companion Slot configuration, two adjacent slots in a Trusted Chassis are configured
for the same Input Module function. One slot is the primary slot and the other a unique
secondary (or spare) slot. The two slots are joined at the rear of the Trusted Chassis with a
double-width I/O Interface Cable that 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
Chassis, a single-wide I/O Cable connects the secondary slot directly to the I/O Cable
connected to the failed primary Module. With a spare Module installed in the SmartSlot and
the SmartSlot I/O Cable connected to the failed primary Module, the SmartSlot can be used
to replace the failed primary Module.
Output Module SmartSlot jumper cable TC-308-02.
SmartSlot 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 verifies 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.
36 Issue 16 Rockwell Automation Publication ICSTT-RM278P-EN-P