On Sun, 20 Jun 2021, Leonardo Marsaglia wrote:
Date: Sun, 20 Jun 2021 23:24:05 -0300
From: Leonardo Marsaglia <[email protected]>
Reply-To: "Enhanced Machine Controller (EMC)"
<[email protected]>
To: "Enhanced Machine Controller (EMC)" <[email protected]>
Subject: [Emc-users] About the 7i76E and possible DB25 expansion cards
Hello to all,
I'm deciding which hardware I'm about to use with the CNC router. I'm
mostly inclined to the 7i76E because it has all that I need to drive the
router in one compact board.
I think this board covers anything I'm thinking of at the moment but just
in case I need I/O expansion in the future I would like to ask: Is the 7i75
breakout board the way to add more I/Os to the 7i76E? And in that case I
suppose the direction of the I/O pins in determined in HAL at the startup
right?
You could use a 7I75 to add more protected TTL level I/O. You can also
use 1 or 2 standard parallel port type breakouts for more I/O. There are also
daughtercards for specific I/O like additional encoders or step/dir outputs.
Another option would be using the serial expansion port. One 7I84 added to the
7I76E's serial expansion port doubles the amount of 12/24V I/O by adding an
additional 32 inputs and 16 outputs.
Just curious about this because I'm always using new hardware on every
machine :).
Thanks as always for your help!
Leonardo
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Peter Wallace
Mesa Electronics
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