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2007-09-27 by randaleem
Hi MOTM'ers! Quick question for y'all, Does the MOTM system use a clean/dirty GND? The two GND pins suggest it, but perhaps not?. If there is a separate dirty gnd pin, which of the two pins is considered the dirty gnd? (The one next to -V or the one next to +V?) Continuing, if there is a dual gnd setup: Do all MOTM modules respect this division of the return paths? Thank you, Randal
2007-09-27 by Mark
There is only one ground. The two ground pins are connected to each other at each module, and the two ground wires are connected at the power supply. The only MOTM modules that use two grounds, are the digital modules that use 5V. On 9/27/07, randaleem put forth:
>Hi MOTM'ers! > >Quick question for y'all, > >Does the MOTM system use a clean/dirty GND? The two GND pins suggest >it, but perhaps not?. > >If there is a separate dirty gnd pin, which of the two pins is >considered the dirty gnd? (The one next to -V or the one next to +V?) > >Continuing, if there is a dual gnd setup: Do all MOTM modules respect >this division of the return paths?
2007-09-27 by Richard Brewster
That is right. Even the digital and analog grounds of modules like the MOTM-650 are connected together at the MOTM-950 power distribution board. This easily confirmed by an ohmmeter. Richard Brewster Mark wrote:
> There is only one ground. The two ground pins are connected to each > other at each module, and the two ground wires are connected at the > power supply. > > The only MOTM modules that use two grounds, are the digital modules > that use 5V. > > On 9/27/07, randaleem put forth: > >> Hi MOTM'ers! >> >> Quick question for y'all, >> >> Does the MOTM system use a clean/dirty GND? The two GND pins suggest >> it, but perhaps not?. >> >> If there is a separate dirty gnd pin, which of the two pins is >> considered the dirty gnd? (The one next to -V or the one next to +V?) >> >> Continuing, if there is a dual gnd setup: Do all MOTM modules respect >> this division of the return paths? >> > > > > Yahoo! Groups Links > > > > >