I have seen it done twice (by the same company) with R2 Jace with onboard IO and also Honeywell LON IO in the larger panels. Lon was also used for the VAVs and also Modbus for Metering. Small fixed application LON IO for tenants metering and miscellaneous monitoring/control.
It worked well and I assume is cost effective otherwise they would not have used this approach.
"Once men turned their thinking over to machines in the hope that this would set them free. But that only permitted other men with machines to enslave them."
- The Reverend Mother Gaius Helen Mohiam
Wire sheets are only as ugly or pretty as the programmer. The customer should never see them anyway. Use the kitPxHvac pallatte. And for a couple hundred bucks, you can connect a laptop, so who needs a local display.
I agree and if you have a java programmer around you can do it in baja. I have developed a generic ahu block for 90 % of the ahu's we do. I use th jace for this all the time. I use cat 6 or lon depending on whats going on.
Remember that if you are going to use I/O, it needs to be on the jace when its first set up and your good to go.
If you write a generic ahu program (java or block) you can use it over and over again. Set up time becomes short, hours drop and more money made.
New Spyder tool will allow to program on the JACE. It doesn't take any additional memory compare to dynamic device. The program is loading to the memory only when you see wire sheet and unloading as soon as you switch to another one.