Liebert MPXIPC-NXH30XXX User Manual

Page of 40
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.