7i80HD+7i48+7i42TA+7i84 Mesa firmware request (morbidelli author 503 retrofit)

Hi,

I'm looking to check that this combination is viable, and if so for the relevant firmware: 7i80HD-16 or 25, 7i48, 7i42TA, 7i84, and pktUART for MB2HAL. 
7i48 is for 5x analogue +/-10v servo amps and 1x analogue VFD. 
I need quite a lot of 24V I/O, some of which can be non-realtime, some of which will need to be realtime. Intending to use the cheap Geroosaty  Modbus 16i/16o boards for the non-realtime and the 7i84 for realtime; maybe a relay board via the  
Is it possible to use some pins on the 7i42TA as a smart serial port for the 7i84, and some as a A+/B- (single ended) for MB2HAL? 
If not I can probably get away with level converters 5V-24V on the 7i42TA and the USB RS485 converter for the modbus stuff, but not having to buy additional boards would be great at this point - already have the above mesa boards on hand. 

Many thanks,
Andy
 

MB2HAL would need the USB----> RS-485 adapter

hm2-modbus would use PKTUART firmware on the 7I80

For the 7I84 and hm2-modbus you would need a TTL --> RS-485
(for Modbus) and a TTL --> RS-422 adapter (for the 7I84)

These adapters are really just a single driver chip on a small PCB

Thank you PCW - so more questions...
Am I right in thinking that the chips is would be converting 0-5v signals to and from the 7i42TA to:
a differential pair for the rs485 with a single bidirectional converter, and:
two, unidirectional, differential pairs for Tx/Rx for 422?

I'm happy to have the USB-RS485 adapter as a fallback, but would like to be able to try keeping all the I/O coming through Mesa cards. Is it possible for the 7i42TA to provide the TTL I/O needed?

If so, could you make a 7i80HD firmware with 1x 7i48, 2x smartserial via 7i42 TTL, and 1x PKTUART via 7i42 TTL?

Yes, you can feed the TTL signals through the 7I42TA

I can build the firmware in the next day or so

 

Great! Thank you for taking the time, as always.