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How much V and mA for Legato
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ferrilu1  
#1 Posted : Wednesday, January 26, 2011 2:35:58 PM(UTC)
ferrilu1

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Hi just to be shure, I have to power a Legato with a Placid BP, so the PlacidBP board has to be set at 12Volt and 360 mA. Correct ?
I know is a stupid question but help me
Many thanks
Gianluca
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Gabbb  
#2 Posted : Thursday, January 27, 2011 6:23:40 AM(UTC)
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ferrilu1 wrote:
Hi just to be shure, I have to power a Legato with a Placid BP, so the PlacidBP board has to be set at 12Volt and 360 mA. Correct ?
I know is a stupid question but help me
Many thanks
Gianluca


Mine is set to 300mA / rail. (12 volt with the onboard balse enabled)
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LeonvB  
#3 Posted : Thursday, January 27, 2011 11:41:48 AM(UTC)
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If you are using the 2.1.2 version of the Placid BP, measure the voltages across R13 and R14. These should be around 50mV. If they are lower, adjust VR1 and VR2 accordingly.
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ferrilu1  
#4 Posted : Thursday, January 27, 2011 2:48:39 PM(UTC)
ferrilu1

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Dear Leonvb do you mean with the
Legato load connected? Now I have 0.25Volt on R1 and R2, at the Vout pots I measure 12Volt and 300mA with no load.
When I will connect the Legato board and trim the value of R13 and R14 to 50 mvolt...will I measure 250 mA at the V out ?
Thanks for your helpfull reply
Gianluca
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LeonvB  
#5 Posted : Thursday, January 27, 2011 3:59:56 PM(UTC)
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Yes, that measurement is done with the load connected. First you do the rough setup, then you fine tune the pots with the load connected. The fine tuning will make sure you're shunting what is needed for your setup (meaning your specific Legato & Placid combo): no more, no less. Please make sure you follow the right procedure for your version of the Placid BP. R13 and R14 are only to be used on V2.1.2. See the Placid BP manual for details.
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ferrilu1  
#6 Posted : Friday, January 28, 2011 1:48:54 AM(UTC)
ferrilu1

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Thanks a lot for your help

gianluca
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