Connecting direct current power supply modules from a floating 24 or 48 VDC direct current network
(Original Document)
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Illustration
Diagram showing the principle:
DANGER
ELECTRIC SHOCK - GROUNDING FOR FLOATING MOUNTING OR MARINEAPPLICATIONS
In the case of floating mounting (not linked to ground) used for specific applications and in particular in Marine Applications, an insulated TSX PSY 5520 (24/48 VDC) supply module must be selected.
Failure to follow these instructions will result in death or serious injury.
NOTE: A device can continually measure the level of insulation of the 24 VDC (or 48 VDC) in relation to the ground, and can give an alert when the level of insulation is abnormally low.
The input/output modules in the Premium range are insulated.