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

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The maximum wattage that can be drawn by the 15454-SA-ANSI shelf (System Release 3.1 and 
higher) based upon selecting system components with the highest power draw is 1060 watts.  
Maximum wattage that can be drawn by the 15454-SA-NEBS3E shelf (prior to Release 3.1) is 
952 watts. 
 

 
Maximum amperage required by the 15454-SA-ANSI shelf is approximately 24A.  However, to 
ensure a sufficient operational safety margin, Cisco recommends that the ANSI shelf be fused at 
30A.  The nominal maximum amperage required by the 15454-SA-NEBS3E shelf is 
approximately 20A.  However, to ensure a sufficient operational margin, Cisco recommends that 
the NEBS3E shelf be fused at 25A. 
 

 
The power solution required for proper operation of a Cisco ONS 15454 is dependent on the your 
specific needs and shelf configuration.  To power a single shelf, a 3- to 5-rack unit (RU) AC-to-DC 
rectifier will typically suffice.  For configurations that call for redundant power feeds to the shelf 
through the A and B battery terminals, two rectifiers will be necessary.  To power several Cisco 
ONS 15454 shelves, a larger solution requiring a full equipment bay may be more appropriate.  
Additionally, you should consider using an uninterrupted power system (UPS) with integrated 
battery back-up, to enable a Cisco ONS 15454 node to operate if AC power is lost.   
 
For configurations that require less than 1050 watts, Cisco offers an AC-DC power rectifier (part 
number 15540-PWR-AC) that can be rack mounted along with the ONS 15454.  This redundant 
rectifier solution can provide up to 1050 watts to both the BAT 1 and BAT 2 power connectors on 
the back of the ONS 15454.     
 
The Cisco AC-DC Power Rectifier offers up to 1050 watts while supplying -52VDC.  The rectifier 
takes input from a standard 120 V electrical outlet into the 15A keyed IEC 320 AC connector, and 
places the output -52VDC on a Molex PN: 42820 two-pin terminal block connector.  The product 
is shipped in a redundant configuration consisting of one rack mount and two power rectifiers, as 
illustrated in Figure 7-5. 
 

 

 

For node configurations that require more than 1050 watts or for configurations with multiple 
shelves, a third party vendor should be consulted.  To help compare power solutions, please note 
that vendors will typically state the product’s capabilities as a specific amperage at a specific 
voltage (for example, 50A @ 48V).   
 
Cisco does not endorse any specific vendor and recommends considering solutions from as 
many vendors as appropriate.  Vendors listed below are a sampling of companies providing