The standards of our application refer to IEC60950-1, and one of those referrals involves the use of Limited Power Sources. It states that Limited Power Source need to be used, for then the electrician’s job is simplified, even if there is a (single) fault inside of the power supply.
Some examples of testing that a notified body might do, to determine the maximum output current and power meet the “Limited Power Source” requirements are:
Check the power supply at maximum rated load Increase the load of the power supply until it is on the verge of overload Simulate an internal fault by shorting the current-limiting resistor Short out the opto-coupler that provides feedback to the control loop
Does the USB output of the Iris board comply with these requirements (limited power even if single fault occurs)?
Thanks in advance.