© NEC Corporation 2019 28
Hub Board
The Hub board distributes the signals, data and power to other hardware components in the
cabinet, such as Receiving cards, power supplies and Pixel cards. Each Hub board has two
redundant Power supply units (PSU), and two redundant Receiving cards so that both data and
power consumption are managed as expected.
Hub Board Interfaces
The Hub board has several interfaces to distribute power and data. The
Hub Board front
(Figure 25) has the following interfaces:
8 Pixel card network interfaces (A): For data transmission and power supply to Pixel cards.
4 Ethernet ports (B): For data transmission, from Network and power supply socket
16 screw connections to cabinet (C): To secure the Hub board in the cabinet.
Figure 25: Hub Board – Front
The
backside of the Hub board
has several interfaces for data and power distribution (Figure
2× 4 pin connectors to redundant Power supply units (D): Distribute the power from
redundant PSUs to the Hub board, e.g. for the Pixel cards or Receiving cards.
2 Power-good-connectors (E): Send status of power supply to monitoring software.
Be careful when re-assembling the module, the connectors bend easily.
2 Receiving cards (F): Receive data and signal input via Ethernet cables from the external
controller. They process the signals and forward them to the Pixel cards.
1 Signal light cable (G): Forwards the status input of the module to the Signal lights on the
back of the module.
Figure 26: Hub Board – Back
A
B
C
F
G
D
E
E
