LT-6752 Rev 0 August 2023 Page 1 of 3
QMB-5000N
Audio Motherboard and
Card Cage
Contents:
• QMB-5000N Audio Motherboard Card Cage
• 4 screws for the deadfront and 4 hex nuts for mounting into BBX-FXMNS/ MMX-BBX-FXMNS
The QMB-5000N Audio Motherboard Card Cage can be installed in one enclosure, the FleX-Net™/ MMX™ Mass
Notification System (BBX-FXMNS/ MMX-BBX-FXMNS) Enclosure.
See manual LT-894/ LT-894SEC for installation and wiring information.
Figure 1 QMB-5000N Audio Motherboard and Card Cage
4 Screws
1 2 3 4
Amplifier Slot Positions
Backplane
Amplifier Guide Rails
Deadfront
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Figure 2 Back view of QMB-5000N Audio Motherboard and Card Cage
Mounting Holes
Mounting Holes
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Place card cage over the four studs located in the BBX-FXMNS/ MMX-BBX-FXMNS. Fasten the amplifier card
cage to the backbox using the four hex nuts provided with the QMB-5000N.
Figure 3 Placement of QMB-5000N Audio Motherboard in the FleX-Net™/ MMX™ Mass
Notification System (BBX-FXMNS/ MMX-BBX-FXMNS) Enclosure
Batteries (maximum 40 AH)
BBX-FXMNS/
MMX-BBX-FXMNS Backbox
Mounting Hole
Mounting Hole Mounting Hole
Mounting Hole
Mounting Hole
FX-2000MNS/
MMX-2000MNS and
FX-4000MNS/
MMX-4000MNS Main Fire
Alarm Board and backplate
(3 adder modules may be
mounted over the main board,
similar to the FX-2003-12NDS/
MMX-2003-12NDS)
QMB-5000N Audio Card
Cage (Space for an
ANC-5000 Audio module,
TNC-5000 Telephone
module and four
amplifiers)
Mounting positions for 2
adder modules in each spot
PS-2040 Power Supply
Mounting position for 2
adder modules in each spot
Transformer and
FX-2000MNS/ MMX-2000MNS
and FX-4000MNS/
MMX-4000MNS Alarm Board
Connection
Battery Disconnect
Board
Transformer and AC IN
Connection
Transformer and Card
Cage Connection
33.5”
25”
16.5”
/