A TIU, AIU and WIU can do much more than just run your trains!
We've been looking at fancey new control systems to replace our 50 year old manual switch board that operates our grain handling facility. Almost everything we looked at had extremely high costs, lots of rewiring of the control room and removal of the reliable / easy panel that is already in place. Really all we wanted was way to remotely control (start & stop) various augers and the grain leg for troubleshooting and posiibly a better interface.
In comes a TIU, AIU and WIU. The switches in the main control board only have handle 24 volts at less than 1 amp to activate the heavy duty motor contactor. So I wired in an AIU to allow it to override the manual switch control which gave us enough control over most of the functions that are happen at the top of the grain leg. With the WIU plugged into the farms mesh WiFi, the control can happen from almost anywhere within a mile of the grain facility. Also with VPN access to the farm's network you can control the facility from anywhere as long as you have an internet connection on your phone.
The system has also allowed us to add some safe-guard abilities as well. I have programmed macros to start the right motors in the proper order so that we don't create a giant mess on top of a grain bin, "rain" grain on the ground by accident, or overload the system by starting too many things at once. A tablet in the the control room now allows someone to pick which bin we are delivering grain to and the macro starts the correct motors with a nice delay between each motor start.
We also looked at other generic app based relay control systems but they to were much more expensive than what could be done with MTH and the DCS App was much easir to program and offered macro functionality. The MTH DCS control added to the Grain Center only cost us about $400 vs $7,000 to $13,000 we were looking at from other customized solutions. Plus I can add 4 more AIUs to control up to 40 more functions if we would ever need to.
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