Hello all, we have a circuit here from an old system that keeps blowing fuses every now and then. We have no idea what the right size fuse should be as there is no documentation for it and the fuses have kept getting changed over the years. I would like to take the connected components and based on their rating calculate a proper fuse size. I have a circuit feeding 15 Flex I/O 1794-IA16's and all the sensors connected to them. I assumed i would take the sensor specs which most have a spec of max 100mA with some having a max of 300mA. According to the 1794 sheet each input point has a max amperage draw of 14.81mA. So each point for the 100mA sensors could pull a total of 114.81mA, and if I had 16 sensors connected to one of my 15 flex cards and the sensors were active it would total 1837mA. Multiply that by 15 cards and I get 27,555mA. Is that correct in how i figure the fuse size needed for this?? It seems quite a bit high and i don't think its right but i don't know how to figure this. Especially since 82 of the 106 sensors are currently on right now and the circuit is only drawing 1.16 amps....I greatly appreciate any help or to be pointed in the direction of some documentation on how to do this.