23
TLX48 2RU KVM Matrix Switch Product Manual
thinklogical
Rev. B, May 2022
Safely Remove an Active Control Card or Shut-down the System
During normal, non-maintenance operation, the
Primary Control Card (CTRL 1, lower card) should always
be the Active controller for the system.
However, there may be times when other conditions temporarily exist,
such as during maintenance, updates, repairs, etc.
Although the system will run normally on the Back-up Control Card, not having a second card eliminates the fail-
over protection afforded by a redundant, two-card system.
The following commands allow the safe removal of a Control Card and the switch of activity from one Control
Card to the other without interruption of connections
Note: During normal operation, the Primary Control Card (CTRL 1, lower card) should always be
the active controller for the system.
During normal operation, the Primary or Back-up Controller can be managed via the console port or over an
SSH connection.
The HALT Command
•
Typing
halt
at the command line will perform an orderly shut-down of the active Control Card.
•
Once the Control Card is inactive, it will stop signaling the other Control Card. This prompts the other
card to become active. This typically takes just a few seconds.
•
Remove any cables (LAN, RS-232, Console, etc.) from the inactive card. It can now be safely removed
from the chassis.
(See next page.)
•
At this point, the system is now running on the Back-up Control Card.
Note: Re-inserting the Primary Control Card restores the system back to running on the Primary
Control Card. Ensure that the LAN connection to the card is restored promptly.
The PWROFF Command
•
Typing
pwroff
at the command line prompt, from either the Primary or the Back-up Control Card, will
halt BOTH Control Cards and turn off the power to all the I/O Card slots in the system except the
controllers.
Note: I/O card slot power cannot be turned off on the TLX48 2RU.
•
Remove the AC power cord(s) from the Matrix Switch or from the AC source for a complete system shut-
down.
•
Remove any cables (LAN, RS-232, Console, etc.) from the Control Cards.
•
The Control Cards can now be removed, swapped or replaced as needed.
(See next page.)
Upon turn-on, the Control Card in the lower slot will become the Primary and the Card in the upper slot will be
the Back-up.
The HALT Button
HALT (Primary Controller)
: In a TLX48 2RU with an operational Back-up Controller, holding this button for >5
seconds will halt the CPU (iMX6) and switch active control to the Back-up Controller. If the TLX48 does not have
a Back-up Controller, holding this button for >5 seconds will halt the CPU and power down the I/O Cards. Note
that the RMV (
r
e
m
o
v
e) LED will be lit and the ACT (
act
ive) LED will not.
HALT
(Back-up Controller)
: Holding this button for >5 seconds will halt the CPU (iMX6). If the Back-up
Controller was the active controller, the TLX48 will also power down the I/O Cards. If the Back-up Controller was
not the active controller, the CPU will be halted and is ready to be removed. Note that the RMV (
r
e
m
o
v
e) LED
will be lit and the ACT (
act
ive) LED will not.
