Should Medical Device SIGNAL INPUT/OUTPUT PART be overloaded?

[Roland chung]

Hi all,

I was recently told that SIGNAL INPUT/OUTPUT PART (e.g. RS232, RJ45, USB port) on the equipment should take into account the overload test.

From the engineering standpoint, I could not agree on such point of view. It seems pointless because of the transformer overload test is considered and SIGNAL INPUT/OUTPUT PART is usually the secondary circuit which powered by the transformer. Furthermore, the bigger question is how to overload a signal line (e.g. network signal).

I hope pepole here could share your opinions.

Thanks,
Roland

[Stijloor]

A Quick Bump!

Can someone help Roland?

Thank you very much!!

[raymond02302]

I think overload test for SIP/SOP makes no sense. Overload test for mains transformer is required in standard. Overload can head up the insulation system in the transformer, therefore, overload test can be used to evaluate the temperature of insulation system (winding, core, tube, vernish etc) according to limits of its own classification (A, E,B, F etc).
SIP/SOP is just the secondary circuit and rarely have isolation to secondary circuit.
hence there is usually no isolating components in the board of SIP/SOP. Overload test for such SIP/SOP is apparently pointless.