On Wed, 1 Apr 2020, andrew beck wrote:
Date: Wed, 1 Apr 2020 13:43:20 +1300
From: andrew beck <[email protected]>
Reply-To: "Enhanced Machine Controller (EMC)"
<[email protected]>
To: "Enhanced Machine Controller (EMC)" <[email protected]>
Subject: Re: [Emc-users] connecting up mpg
Hey just another question here guys.
I am running out of spare io and want to close the loop back to the control
with my encoders so the machine can home to index and knows where it is
when drives are turned off under e stop condition.
I know about the 7i85 with 4 encoder inputs but the rest of that board
looks like it's all serial connections. Can I use those for general inputs
and outputs or do I need another card like the 7i73(operator interface
card) ?
You can use the serial outputs as 5V signals. These are differential
so you would get true and inverted output pairs for each of the TX pins
The serial inputs are harder to re-purpose since they are differential
inputs with a 120 Ohm termination
Regards
Andrew
Peter Wallace
Mesa Electronics
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