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MDS™ Master Station
MDS 05-6399A01, Rev. F
Modules.
Peripheral slots on the Master Station include all slots between the power supply modules (on the
left) and the duplexer tray (on the right). On an MDS™ Master Station, the peripheral slots are
populated with the following modules, from left to right: Platform Manager, Radio Module, a
second Radio Module if redundant, and an Alarm Module or Alarm/Relay Module if redundant.
To remove peripheral modules, first disconnect cables attached to the faceplate of the module
you are removing. Label connections if necessary to remember how connections are made.
Loosen the two thumbscrews on the front of the module, then slide the module straight out,
moving other cables out of the way as necessary.
The Radio Module heat spreader gets very hot under normal operating
conditions. Always use caution handling recently powered Radio Modules.
When removing a Radio Module,
do not touch the heat spreader
. It is recommended to pull the
Radio Module out only part way, disengaging the module from the backplane and rear heatsink,
and then allow the Radio Module to cool for several minutes before removing it fully from the
chassis.
To install a peripheral module, align the module with the card guides and slide into the chassis
until it engages with the backplane. Push firmly on the faceplate of the module to ensure a good
connection and hand-tighten the thumb screws. The thumb screws can be further tightened with a
screwdriver. Radio Modules should be tightened to 10 in-lbs, or approximately ¼ turn past hand
tight, to ensure optimum heat transfer through thermal contact connector on the rear of the unit.
Reconnect faceplate cabling connections to other modules as necessary.
Hot Swap Redundant Modules
On a redundant unit equipped with two Power Supplies and two Radio Modules, these modules
can be removed and/or installed while the unit is powered and operational. Replacing a Power
Supply
does
require first removing the supply input for the module, but the alternate Power
Supply can remain powered. The unit will continue to operate using a single power supply.
When removing a Radio Module on a redundant unit, we recommend changing the selector
switch on the Alarm/Relay Module to lock the active radio to A or B as appropriate before
removing the other Radio Module. This should be done even if the desired radio is already
active. The manual override toggle switch is locking, and must be pulled out to change positions.
Switch functions are as follows:
-
Up
—Radio A;
-
Down
— Radio B;
-
Center
— Automatic.
Once a new Radio Module is installed, the Select Switch should be returned to the Center
(Automatic) position for redundant operation.
A newly installed Radio Modules may require firmware reprogramming
and configuration update from the Platform Manager. Green alarm and
power LEDs on the Radio Module will alternate quickly during this process. Allow up to 5
