Hi,
I own an MK3 / 9 Controller; after updating the firmware for the new TNG v.2 the ExtOut board with relay at each new switch-on has all the active outputs, which did not happen with the old firmware used with CNCUSB. I think it is a peculiarity / bug of the new firmware as the outputs are activated even if the software is closed (therefore with the controller only turning on). At the moment I have no device connected to the relays and with the M64 command I can disable them but the fact that they are activated at power on could be dangerous when I connect accessories to the outputs.
My ExtOut card is the PoExtBusRe of Polabs very similar to that of Planet.