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Note:  When the Nexus 2 is shipped from the factory, both power connectors are 
covered by a warning label. Make sure this label is completely removed 
before using the Nexus 2. 
Note:  Nexus 2 requires a  dedicated SELV 24 V  60VA AC / DC  supply (Class II 
supply) or a dedicated Dell SELV 19.5 V 65 W PSU. 
Note:   The  recommended  supply  for  warranty  purposes  is  the  included  Dell 
PSU. 
   When using a higher VA transformer, care must be taken to ensure that 
the  voltage  stays  within  specification  (see 
Detailed  Engineering 
Specifications - Power 
on page 15). 
Warning: 
  Earthing or Grounding of any of the terminals connected to 
the  SELV  power  supply  will  cause  serious  damage  to  the 
power  supply  rectifier  and  will  invalidate  the  product 
Warranty. 
  Never Earth or Ground any of the terminals connected to this 
power supply.  
  Never use this power supply to power CB, NB, or SBC control 
devices, or any other equipment, because it is possible that 
the other equipment may be connected to Earth or Ground.  
Note:   If the Nexus 2 is acting as a Site’s central server, hosting the primary UI 
and historical data, it is recommended that its power supply is connected 
to an Uninterruptible Power Supply (UPS). 
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