Robert,
My point, that you're choosing to altogether miss, is that DCS is a system where specifications are designed to allow all functions and features of the system to be utilized under any conditions. What you do under the limited conditions of your DCS system implementation should not, under any circumstances, be perceived by someone who doesn't know any better, as constituting any kind of a general standard.
The fact that you choose not to use a feature, which I and many others do regularly use, doesn't make your out-of-spec use of the RS power supply good for anyone other than you.
The standard is that the RS power supply's use is not recommended for any TIU that has attached AIUs, due to the fact that the power supply's available power doesn't meet the specs required to operate all of the system's features and functions.
