Cisco Cisco ONS 15454 SONET Multiservice Provisioning Platform (MSPP) Guía De Diseño

OL-4556-01

 

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power solutions suitable for the Cisco ONS 15454.  Information regarding these vendor’s 
products can be found on their respective Web sites.   
 

   APC   

www.apc.com

  

   Hendry  

www.hendry.com

  

   Eltek   

www.eltek.no

  

   Sorensen 

 

www.sorensen.com

  

 

 
The ONS 15454 has redundant -48VDC #8 power feeds on the shelf assembly backplane.  
Power terminals (shown in Figure 7-6) are labeled BAT1, RET1, BAT2, and RET2 and are 
located on the lower section of the backplane behind a clear plastic cover. 
 

 

 

 
The black piece of plastic is dielectric and has been increased in length to better isolate the A and 
B power feeds.  This design better protects against voltage spikes and accidental shorting. 
 
The redundant –48VDC is distributed through the backplane to each of the 17 card slots.  Every 
ONS 15454 card contains O-Ring diodes to isolate the battery feeds, inrush-limiting and filtering 
circuitry, and local switching regulation.  Wire-wrap pins on the backplane provide frame grounds 
to minimize any transient voltage or current disruptions to the system when a card is inserted in 
the shelf. 
 
To install redundant power feeds, use four power cables and one ground cable (#10 AWG, 
copper conductor, 194°F [90°C]) and one ground cable (#6 AWG).  Cisco recommends the 
following wiring conventions illustrated in Figure 7-7: 
 

    Red wire for battery connections (–48 VDC) 

    Black wire for battery return connections (0 VDC)