Datasheet

Liebert
®
MPX
™
Installation and Assembly
15
Disconnect Loads Before Adding or Removing an MPX
™
BRM
™
During normal operation, MPX BRMs (Branch Receptacle Modules) are hot-swappable. While adding
or removing an MPX BRM, no user loads can be connected to the MPX BRM. Attempting to do so may
damage the Liebert
®
MPX
™
or connected equipment.
To attach either the MPX PEM
™
or a MPX BRM:
1. Orient the module so that the power conducting tabs fit into the power bus on the MPX PRC
™
and
the communication contacts will fit into the MPX PRC’s communication bus (see Figure 13).
2. Make sure that the integral connectors at each end of the module are oriented so they will fit into
the slot on the MPX PRC (Power Rail Chassis).
3. Press the module firmly onto the MPX PRC.
4. Secure the module to the Power Rail Chassis with the Integral Connectors; there is one on each
end.
a. Use a screwdriver to press each connector down. The Integral Connectors on the MPX PEM
have tamper-resistant Torx heads; Integral Connectors on the MPX BRM have PoziDriv
heads, however, the same size Phillips head screwdriver can be used.
b. Turn the screw until it locks and tightens, about three-quarters of a turn.
Figure 13 Attach a module to the MPX PRC
5. Repeat Steps 1 through 4 for each additional module.
NOTE
Do not overtighten the connector on either end cap. Overtightening can damage the equipment.
!
WARNING
Risk of arc flash and electric shock. Can cause equipment damage, injury or death.
Do not remove the screws that affix the end cap. Removing the end cap will expose energized
parts with hazardous voltage.
NOTE
The Liebert MPX will operate properly if spaces exist between modules, but adding modules
will be hampered unless the space left is the size of a standard MPX BRM. Decorative covers
are available to reserve the proper space on the MPX PRC and to protect any unused sections of
the unit’s surface.
MPX PRC
Power Bus
Integral
Connector
locking end
on MPX PEM
Power Conductors
entering MPX PRC
Power Bus.
MPX PRC
Communication
Bus
Integral Connector
pressed into slot.
Screw head will be
flush with end cap
when the Integral
Connector locks in
place.
Screws secure end
cap to MPX BRM.
Never remove these
screws.
MPX BRM
™
shown; Integral
Connectors on the MPX BRM have
PoziDriv heads; MPX PEM attaches
similarly except Integral Connectors
on the MPX PEM have
tamper-resistant Torx heads.
Screwdriver depresses
Integral Connector so
the locking portion will
fit into slot.