I have general question about required isolation, creepage and clearance distances for medical devices with patient connections but having also connections available to USB for data and power and/or Ethernet. I searched other topics but couldn't find an exact answer, although this seems to be a general and common design issue.
Both USB and Ethernet operate in low voltage, 5V supply. Does it mean that the medical device need 2 means of protection with working voltage of 5V? In many topics, I saw people recommending 240V as working voltage because the USB can come into contact with the mains. But wouldn't that be a single fault condition? So, you need only 1 MOP for 240V?
Both USB and Ethernet operate in low voltage, 5V supply. Does it mean that the medical device need 2 means of protection with working voltage of 5V? In many topics, I saw people recommending 240V as working voltage because the USB can come into contact with the mains. But wouldn't that be a single fault condition? So, you need only 1 MOP for 240V?