Instruction manual

Enova DGX DXLink™ Twisted Pair Boards
88
Instruction Manual – Enova DGX 8/16/32 Digital Media Switchers
Power Budget Planning for Systems with DXLink Boards
Before installing an Enova DGX Switcher and connecting any required DXLink Transmitters and
Receivers, the power draw for the system should be calculated in order to maintain the power
redundancy of the power supplies in the enclosure. (Each Enova DGX enclosure ships with two
mutually-redundant power supplies.)
Important: If you do not want to draw power from the Enova DGX enclosure’s power supplies, you
must power the DXLink Transmitter and Receiver Modules with local power (must use the provided
desktop power supply) or remote power (must be a DXLink power injector
). Local or remote power
always overrides power from the switcher. If local or remote power is turned off, the DXLink
Transmitters and Receivers do not power down but immediately start drawing power from the
switcher.
Power Budget Calculation
Calculating the power budget helps determine how many DXLink Transmitters and Receivers can be
powered via the Enova DGX Switcher while maintaining power redundancy if one of the power supplies
should fail. The Enova DGX Configuration Tool is used to determine the switcher’s power budget.
Simply enter the types of boards and the number of DXLink Transmitters and Receivers to be powered
via the switcher, and the calculator shows the resulting power draw. The Enova DGX Configuration Tool
is located at www.amx.com/enova. If more DXLink units are required than the switcher can support
while maintaining redundancy, they must be powered using the provided desktop power supplies (which
must not be altered in any way) or a DXLink power injector; otherwise, damage may occur.
Foregoing Power Supply Redundancy
Depending on particular Enova DGX Switcher input and output board configurations, operating over the
redundant power supply level may be necessary on a permanent basis for some installations. While
foregoing the benefits associated with a redundant power supply should be understood, operating
without redundancy is in no way detrimental to the system, as long as both power supplies are
operational. In this case, necessary power will be pulled evenly from both supplies. However, the loss of
one power supply will result in the system being non-operational from a normal “non-redundant” system
capability perspective.
In the Event of a Power Supply Failure
If an Enova DGX power supply fails, check to determine which situation applies:
Enova DGX 8/16 within its power budget – The system will continue to run; okay to leave
it powered until the failed power supply is replaced.
Enova DGX 8/16 over its power budget – The system will continue to run; however, we do
not recommended leaving it powered until the failed power supply is replaced, unless enough
DXLink Transmitter or Receiver Modules are removed (or otherwise powered) to bring the
system’s power budget within its maximum limit. (Another option is to remove some of the
input and/or output boards.)
Enova DGX 32 within its power budget – The system will continue to run; okay to leave it
powered until the failed power supply is replaced.
Enova DGX 32 over its power budget – The remaining power supply will turn off. If enough
DXLink Transmitter or Receiver Modules are removed (or otherwise powered) to bring the
system’s power budget within its maximum limit, the system will be able to run until the
failed power supply is replaced. (You can also remove some input and/or output boards.)
In all of the situations above, the power supply should be replaced as soon as possible to restore power
redundancy to the system or to allow the system to become fully operational again. Unless the Enova
DGX Switcher has exceeded its power budget, it should operate normally with a failed power supply.
For power supply replacement information, contact technical support (see page 62).