The MX150/250 ATS control systems have been discontinued.
These systems were previously installed in automatic transfer switches, including:

• GE Zenith ZTG Series

• CAT CTG ATS Line

For reference, a demonstration of the obsolete ATS control solution and breaker handling can be found here: YouTube Video.

Below is a recommended wiring configuration for upgrading to the DTSC-200A.

and some pictures from upgrade