Eaton Electrical MN05001002E Manual De Usuario

 

Intelligent Technologies QCPort System Install Manual 

November 2005  

 

MN05001002E 

For more information visit 

www.eatonelectrical.com

  

Page 

18

 

Use the following guidelines to protect your devices and achieve the best results when 
supplying power to the QCPort interconnect system. 

IT. Power Supplies 

The IT. family of products includes power supplies that meet the needs of the QCPort 
devices and motor control.  The same power supply that is used for the IT. motor 
controller line is applicable to the QCPort system. 

When selecting a power supply from another vendor, use the following guidelines: 

•  Use power supplies rated at 24V  

•  Select a power supply that provides sufficient current for all attached nodes. 

Note: In the U.S. and Canada, be sure to adhere to NEC and CE Code limits 
respectively. 

•  Use a power supply that has its own current limit protection. 

•  Make sure you derate the supply for temperature using the manufacturer’s 

guidelines. 

•  Provide fuse protection for each segment of the cable system; any section 

leading away from a power supply must have protection (can be part of the 
power tap). 

The power capabilities of the QCPort interconnect system include: 

•  Power supplies rated at 24V DC. 

•  Long Run cables rated for 4 A steady state. 

•  Interconnect Cables rated for 1.0 A steady state. 

•  Backplane rated for 6 A steady state. 

Check your national and local codes for additional information.  In the United States 
and Canada, the QCPort cable system must be installed as a Class 2 circuit.  This 
requires limiting the current to 4 A. 

 

The QCPort Interconnect rating is 1.0 A, but the allowable current depends on the length 
of the run.  The maximum current decreases as the QCPort Interconnect cable length 
increases, as indicated in the table below.