Duet3 6HC V1.02b absolute max ratings?

[crap]

Hi! I just recently bought a 6HC mainboard v1.02b, as an upgrade for my machine that currently uses an older v1.01 board. I'm doing this so I can increase voltage and thus stepper motor performance.

But before I install it there is one important question I would like the answer to. This board is officially rated up to 48V, but is that the absolute max voltage or the highest recommended nominal voltage? If 48V is absolute max I would hesitate to run it off a 48V power supply without turning it down a few volts. But since I'm doing this upgrade to get maximum performance I don't want to tune it down just because I'm not sure.

So yeah, will it run safely from a 48V power supply or should I turn it down maybe 45V?

Thanks in advance,

/David

[dc42]

@crap the absolute maximum for the 6HC is 60V. Bear in mind that when stepper motors are decelerated or turned off they feed energy back into the VIN rail, causing its voltage to rise. So you need to allow a reasonable safety margin, for example by using a VIN voltage of 50V or lower.

[crap]

@dc42 thanks, exactly what I needed to know! I'll be staying within safe operating limits. Given this information I probably won't push much past 48V.