edmond.merilh@LIGO.ORG - posted 08:47, Thursday 21 April 2016 - last comment - 15:20, Thursday 21 April 2016(26712)
24VDC Power supply/rack for Safety Interlock System installed
Yesterday I installed a Sorenson power supplt into the rack I placed in the closet in the LVEA. It was connected to the fuse block and powered up. After testing for the proper voltages/polarities at the drops, power was connected to the Beckhoff interlock modules and visual confirmation of function was confirmed. The total current draw for 7 of these units, as they currently sit under power, is approximately 600µA.
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Why are we installing a noisy switching supply in the LVEA? These Sorensons were banished for a reason...
They were not banished. Some issues were attributed to them and we removed them. This unit powers a digital system and is far enough away from sensitive systems based on measurements done for PSL UPS on the floor.