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Reply to "Weak DCS signals, Failed TIU Output Drivers, and Design Solutions devloped under collaboration between AGHR and MTH"

Ryaninspiron posted:
Oman posted:

It seems like everybody is overlooking a key benefit of John's solution.

"Schottky diodes couple the voltage limiting to the pins while limiting the stray capacitance from the TVS."

Certainly a good point. The argument being that any capacitance is bad for signal quality and the lifespan of the ACT244 itself right? More capacitance equals more work for the driver to do right?

Watching for a response to “More capacitance = more work for driver?”, wondering if block length along with wire size (large for reduced voltage drop) contribute to channel failures in TIUs, as well as signal reduction (have heard this long ago) as capacitance damps the signal.  It would diminish peak signal voltage, as well as blur the edges of square signal waves, right?

Does this lead to logic for breaking long mainlines not just into blocks less than 75-110 ft long (range of what I’ve read) with branched leads from a single TIU output, but also into separate TIU channels, for reasons of capacitance per channel reduction??  For signal improvement, and does that also lead to reduced risk of TIU output channel failures?

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