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[Fwd: Re: pin out for Droege mwpc high voltage supply]



Dear Peter,
some documentation about remote input
Regards, Paul

-- 
Paul T. Debevec
405 Loomis Laboratory of Physics
University of Illinois at Urbana-Champaign 
1110 W. Green St.
Urbana, IL 61801-3080 MC-704 
Telephone: 217-333-0285
Fax: 217-333-1215
email: debevec@uiuc.edu

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Dear Paul,

The Remote Connector on the back of the 6900 is defined as follows:

        pin       function
        ---       -----------------------------------------------------
         A        Neg input, diff control voltage, supply A
         B        Pos input, diff control voltage, supply A
         C        Neg input, diff control voltage, supply B
         D        Pos input, diff control voltage, supply B
         E        Ground (shield of control cable)
         F        HV monitor voltage, supply A
         G        HV monitor voltage, supply B

Notes:

1.  It looks like the differential control voltage range is 0 to -4V,
    defined as (Vpos - Vneg).  So, if your control voltage is positive,   
    0 to 4V wrt a 0V ref, connect the 0V ref to the pos input of diff 
    control, and connect the positive control voltage to the negative pin 
    of the diff input.  Reverse this convention if a negative control 
    voltage is used.

2.  The monitor pins are conncted to the same lemo connectors that are
    on the front panel. 1V = 1 KV.

I think that I got the conventions right, but you should check this on the 
bench before hooking it up to a detector.  I couldn't find the remote 
feature described in the documentation, and had to try to read it off of 
30 year old schematics, copied several times...  

Let me know if you have questions.

						Gary


--
****************************
Gary Drake
Argonne National Laboratory
High Energy Physics Division
HEP 362
9700 S. Cass Ave
Argonne, IL  60439  USA
Tel. (630) 252-1568
Fax  (630) 252-5047
****************************

On Tue, 25 Apr 2006, Paul T. Debevec wrote:

> Dear Mr. Drake,
> The engineers in our high energy group suggested that you might be able 
> to help me out with a question about the mwpc supply that Tom Droege 
> designed.  The Fermilab web site calls in a Kielber 6900, see 
> http://www-esd.fnal.gov/esd/catalog/main/fermilab/es7125.htm, but 
> everyone here calls in a Droege supply.  I am writing you because my 
> colleagues believe that Tom does not check email all that often any more.
> 
> I have borrowed several of the supplies, and I would like to use the 
> remote input connector on the rear panel.  I need to know the pin out 
> for the connector.  I have several Bertan supplies, and these supplies 
> have the same connector.  Bertan says that pin A controls power supply 
> A, pin C controls power supply B, and pins B and D are ground.  Also the 
> control is 1 V DC = 1 kV.  Is the pin out the same for the Droege 
> supply?  If you do not have access to the schematic, perhaps you could 
> suggest some one at Fermilab who could help me out.  Thanks very much 
> for your trouble.
> Regards, Paul Debevec
> 
> 

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