2017-09-22, 22:51
(2017-09-18, 01:27)kevinmcc Wrote: Connecting a crossover or rollover cable to the H-Field connection you may cause damage as you are connecting some powered signal lines to ground.
The power is on pins 4 (+5 V) and 5 (Gnd). A cross over cable doesn't move that pair it just swaps 3&6 with 1&2.
Using a cross over cable H-Field socket to H-Field amp won't be a problem apart from channel 1 and channel 2 being swapped.
Mistaking the H-Field socket for the ethernet port and connecting that toa switch may be problematical depending on what is one the other end. If it's a 10/100 Mbps port that may well short pins 4 and 5 and thus the +5 V rail of the controller. I think the +5 V regulator is pretty robust and short circuit protected though. If it's a Gigabit port that might object to having 5 V across and some current flow through the isolation transformer of pair 4&5. But again the isolation transformers do seem fairly robust.