Bricked Mesa 7i92T

The thing is, I don't know how to do it))
This is my first time doing this, and I'm already panicking because I've been trying to figure it out for over a month))) Now I've decided to ask people for help!))
My LinuxCNC doesn't have any firmware for Mesa 7i92TH at all.

I downloaded the archive for mesa 7i92t cards from the official website, but there are so many different firmware versions that I don't understand which folder I need to copy.

It comes down to what pinout you need.

What is the 7I92T connected to?

That is, what breakout board are you using?


 

Hello! Thank you for your support! I only use 7i91th.

You can look at the .pin files in the firmware directory
to choose a appropriate pinout

7i92t_5abob_encd.bin for example has 5 stepgens and 6 encoders

Note that if you connect directly to encoders and motor drives:


1. The 7I92T I/O pins are like a bare parallel port pins and will be instantly damaged if connected to a voltage outside the -0.5 to +7V range. This is easy to do if system grounding is not 100% correct.

2. If you use bare 7I92T outputs to connect to step motor drives, they should be used in a a sinking configuration, as that is the only way to get full 5V drive:

DRIVE 7I92T
PUL+ +5V
PUL- 7I92 STEP PIN
DIR+ +5V
DIR- 7I92 DIR PIN

Does this firmware version also contain pins for ‘End Stop’ for 4 axes?

Does this mean that I have to use optocouplers?
What does ‘a sinking configuration’ mean?

Please tell me, can I use encoders from the Mitutoyo AT111-100F або AT111-200S series?

I have:

Stepper motor drivers DQ542MA

Mesa 7i92TH board (26 pins)

Nema 23 motors

Inductive limit switch NC NPN. BN 10-30V BU0V

C38S6G5-1024Z-G24N DC5-24V encoder

4-channel PC817 optocoupler isolation module

SINO 0.001 mm linear encoder optical scale

24V 10A power supply

Spindel Servo Motor 1000W

Purpose:

4 axes with optical rulers
One rotary axis with rotary encoder
LinuxCNC control

You can use any unassigned GPIO pin  as an input so limit/home switches are supported

Optocoupled step drive wiring:

Sinking:

DRIVE DIR+ --> +5V
CONTROLLER DIR- --> DRIVE DIR-

Sourcing:

Drive DIR- --> GND
CONTROLLER DIR+ DRIVE DIR +

Most step drives have optocouplers built in

BUT the 7I92T is really not intended for direct connection to field wiring.

It will work but a single mistake with grounding can easily damage the 7I92T.
The 7I92T was really designed as a parallel port equivalent device with added features
and is intended to work with parallel port (or Mesa) breakout boards.
 

Please tell me, can I use encoders from the Mitutoyo AT111-100F або AT111-200S series?

I don't think so, those appear to have analog sinusoidal outputs so
require an interpolator (that is, they are not standard quadrature encoders)