Nevion DAC-AVA-DMUX - Manual (Page 13)

DAC-AVA-DMUX Rev. A
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3
How to get started
3.1 Power requirements
The absolute maximum total power consumption for this module is 8.3 W, of which 4.8 W
are drawn from the +5 V supply, 2.7 W are drawn from the +15 V supply, and 0.8 W are
drawn from the -15 V supply. These numbers include 0.4 W from the +5 V supply for the
optional optical input module, and the calculation of how many modules can be powered by
a single power supply can thus be based on 4.4 W for the DAC-AVA-DMUX and 4.8 W for
the DAC-AVA-DMUX-R.
Note that the module will draw its power from multiple supply voltages. When
calculating the number of modules that can safely be used in one frame, it’s
important to consider each supply voltage separately for the power supply in
question. In general there will be no load-sharing between the supply voltages,
and the number of modules will be limited by the worst-case result from the
individual calculations. Example calculation with 75 W power supply, limited to
9A on +5 V (45 W) and 1 A each on +15 V and -15 V (15 W each):
45 W / 4.8 W = 9 , 15 W / 2.7 W = 5 , 15 W / 0.7 W = 21
The +15 V output of this power supply will thus limit the number of DAC-AVA-
DMUX-R cards to just five, even though the +5 V and -15 V could handle more.
3.2 Physical connections
Figure 10: The cable side of the backplane, DAC-AVA-DMUX-C1
The backplane for the DAC-AVA-DMUX is labeled ‘DAC-AVA-DMUX+’ or ‘DAC-AVA-
DMUX-R +’ depending on the type of module it was sold with. It is designed to be fitted in a
Flashlink frame and to take up a single slot. The table below is an overview of the
connectors and their associated functions.