What is the draw of the 7i92, really?
I have a 48V Maxwell supply. I'm currently using a step-down buck
converter to make 5V. This means we have to power off the whole 120v
line when idle, and every once in awhile a user gets confused and tries
to book LinuxCNC without remembering to power up first and gets a face
full of weird errors.
The supply HAS a remote-turn on for the 48V high current out AND a 12v
100mA always-on supply, which I could buck to 5v at roughly 200mA
reliably. I could use a Mesa pin for "Toggle Machine Power" hooked to
the 48v remote-turn-on.
However the Mesa manual does say 250mA max draw.
That 12v 100mA supply would probably have to be the only supply for
running the Mesa 7i92 during jobs, too. Switching to one derived from
the 48v source is kinda dicey.
Does the 7i92 actually ever draw that much, over 200mA, in max use? If
the Maxwell 12v standby line drew 125mA for a moment, will the 12v rail
fold or just allow it?
I know, I could add a 5v 1A usb supply or whatever. I'd rather avoid
adding more hardware though, esp on the 120VAC line.
Danny
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