Conference 49.910::kav30

	The power consumption was significantly reduced between the FT
	rev.C board and the production boards (which will be rev.E) - on
	these boards the power consumption will be VME spec. compliant
	which is 7.8 amps @ 5V @ 50�C. This includes the 1.5 amps which
	could be drawn through the SCSI connector, so the power consumption
	without SCSI current will be 6.3 amps (max!) at above conditions.

	The KAV30 is specified to run from 5�C to 50�C with additional
	cooling of 100 lfm. We measured an dT of 16�C in the vicinity
	of the rtVAX300 block.

	Thomas

    Hello,
            an OEM is evaluating power supply systems for a KAV30-AA
    
    I see the
            5Vdc, 6.0 A tipical
            +12 -12Vdc, 30 mA (without Ethernet)
    om the data sheet and I've just read .-1
    
    1- could someone explain what does the note about Ethernet mean. That
    in fact when Ethernet is working the power drawn is much higher? How
    much?
    
    2- has someone certified any power supply to work safely with KAV30
    
    3- do you have any precision range about the power supply (5%, 8%,
    whatever)so that the board can work correctly?
    
    Thanks in advance for any help.
    Ciao
                                            Marco
    

	The power supply specification is in appendix A.2 of the KAV30
	hardware installation and users guide:

	Note: all values are *MAX* !


*	Supply		5�C		20�C		50�C
*
*	+5V		9.5A		9A		7.9A
*	+12V		200mA		200mA		200mA
*	-12V		200mA		200mA		200mA
*
*	These power specifications do not include the +12V power requirement
*	of devices that you connect to the AUI port. However, this current
*	is limited by a fuse and by the capacity of the backplane connector.
*	These power specifications include the +5V power requirement of the
*	SCSI terminators.


	The *TYPICAL* power consumption at +5V and 20�C is about 6.3 Amps
	without the current for the SCSI connector (the fuse for the
	SCSI connector is at 1.5A)

>    1- could someone explain what does the note about Ethernet mean. That
>    in fact when Ethernet is working the power drawn is much higher? How
>    much?
 
	The power consumption on +12V depends on the device you connect
	to the AUI, e.g. DELNI, DESTA, H4000 etc... The fuse is at 1A.

>    2- has someone certified any power supply to work safely with KAV30
 
	Every powersupply wich is compliant to general standards (UL,FCC,VDE)
	can be used, the total power consumption depends on the layout of 
	your whole system (e.g. number and type of boards in your VME-crate)

>    3- do you have any precision range about the power supply (5%, 8%,
>    whatever)so that the board can work correctly?

	The voltage range is compliant to the VME spec.:
	
	+ 5V 	+0.25/-0.125V	50mV ripple peak below 10MHz

	+12V	+0.60/-0.36V	50mV ripple ..
	-12V	-0.60/+0.36V	50mV ripple ..

Thomas

	

    Many thanks
    		Marco