Power Supply; Figure 27: Redundant Receiving Cards; Figure 28: Behind Hub Board - Redundant Power Supply With Wired Pdu With Pdu Shielding - NEC FA Series User Manual

Receiving Cards
Receiving cards process the data from the Sending card (external video controller) and
distribute the signal to the Pixel cards. The Receiving cards work redundantly. In case of failure
of one Receiving card, the other Receiving card provides the picture.

Figure 27: Redundant Receiving Cards

Power Supply

In each module, two redundant Power supply units (PSU) connect through a Power distribution
unit (PDU) to run in parallel, where each deliver half of the required power. This mechanism
provides power and sufficient reserve. In a case of failure of one or the other unit, the
functional PSU can be delivered in full power from the remaining unit. In rare cases, where
both PSUs are defective, the Power supply units of the module have to be replaced.
The following components contribute to the power supply of a module:
 2 Power supply units (PSU) (A)
 1 Power distribution unit (PDU) (B1) with PDU shielding (B2): The PDU shielding protects
the high voltage components from being touched by accident. Do not remove while power
is connected!
 2 Power supply interfaces to Hub board (C): Counter-part to the Hub board's four pin
connectors to supply the Hub board with power.
B2
B1
Figure 28: Behind Hub Board – Redundant Power Supply with Wired PDU with PDU Shielding
B A C
© NEC Corporation 2019 29