LIGO Document T1200284-x0

DC Power Sequencing Module

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T - Technical notes
A module has been designed utilizing solid state relays that allows a sequence to be controlled upon application of various DC power forms to a rack. The module will be mounted on top of each ISC rack. It will ensure the +/-24VDC power supplies will always be greater than the +/-18VDC power supplies. Upon loss of +24VDC, the +18VDC will shut off. A similar scenario exists for the -24/-18VDC power forms.
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DC power
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