Chapter 3: Technology And Components; Infrastructure Boards - Dell EMC PowerEdge MX7000 Field Service Manual

The following sections contain information about the technology and components in the Dell EMC PowerEdge system.
Topics:
•

Infrastructure boards

• System interconnection
• Input output fabrics
• Storage fabric
• Maximum power configuration
• LCD touch panel
Infrastructure boards
Main distribution board
The main distribution board is the most complex of all the internal infrastructure boards. There are no active components,
however there are many signals interconnected on this board. The main distribution board is horizontally placed near the chassis
floor. From the front of the chassis, the six power supplies plug into connectors on the bottom of the main distribution board.
Also from the front of the chassis the eight compute sleds plug into this board for power, management signals, and other fabric
connections. From the rear of the chassis the Management Modules (MMs) plug in to this board to provide overall chassis
management and control. Also from the rear of the chassis the two fabric I/O Modules (Fabric - C IOMs) plug into this board.
Vertical power distribution board
The vertical power distribution board is above the main distribution board, oriented perpendicular to the chassis floor. There are
no active components, but many signals connections on this board. This board connects to the main distribution board with a
flex cable, and power and ground bus bars. From the front of the chassis, the four cooling fans plug into the vertical power
distribution board. Also from the rear of the chassis the four fabric I/O Modules (Fab-A/B IOMs) plug into this board for power,
management signals, and other fabric connections. A cable connects this board to the rear fan board.
Table 18. Vertical power distribution board description
Item Quantity Description
1 4 Front 60 mm Fan Connector (x4) – Card Edge 2 x 4 Signal, 2 x 2 Power.
2 2 Bus Bar Contact Points.
3 1 FPC Signal Cable Connector – Meg-Array 10 x 20 Flex Cable.
4 4 IOM fabric A/B Power and Signal Connector – 4 x 6 OD RAM.
5 1 Fan Interface Cable Connector – 4P 8S Vertical STB connector.
Rear fan board
The rear fan board, or 80 mm Fan Interposer, sits parallel to the chassis floor. The rear fans plug into this board from the rear of
the chassis. This board connects internally to the vertical power distribution board, through a signal and power cable. This cable
supports power for the five rear fan modules, up to a maximum of 225 W per fan.
Technology and components
Technology and components
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