7i96s +7i83 trough 7i44 is it possible?

Yes, if you use 7i96s_7i77d.bin firmware on the 7I96S, 
you have all the capabilities  of the 7I96S + 7I77.

The only changes are that the 7I96S encoder is moved to
encoder 07 and the 7I96S sserial port is moved to channel 3

This was done to make the encoder and sserial channels
more compatible with standard 7I77 configurations.


 

it's clear, thank you very much. I am currently at the stage of testing encoders pinouts and siemens drivers with an simple battery, I was waiting for the repair of the 7i77 to resolve the dilemma of what to order, 7i96s or 7i92 or maybe 7i97t. since it's 7i77 hope it's fixed, I'll order 7i96s... so I'll get back with news...

I need to attach the female idc26 connector to the flat cable now, so that I don't make a mistake, is the blue wire that I put for the explanation = PIN1 on idc26male? 

Yes, that looks like IDC 26 pin 1.

Its marked with a square pad on the back of the 7I96S card.
Its also the pin closest to the large white square near P1 on the top of the 7I96S card.

This is also DB25 pin 1
(the rest of the DB25 pinout will be correct if you use an IDC DB25M connector)

thanks. under it (black wire) is pin 14 or pin 2?   

Both...

Its pin 2 on a HDR26 but ends up being pin 14 of a DB25
(if you use standard IDC connectors on a 1-1 flat cable)
 

ok now I understand the logic, I made a mistake, I ordered idc26female but db25 also female, so now, since there are no ready-made cables here, only connectors, I will have to use crimping pliers to make the cables myself.