Crouzet millenium 3 custom xb10 r logic controller 24v dc expandable crouzet 88974142 this crouzet millenium 3 logic controller is a compact control unit with powerful functions that provide the capability to build both simple and more complex control and monitoring systems with functions including astro clock and solar tracking the xb10 s is rated at 24v has a larger memory capacity and can be easily expanded with extension modules extension modules with digital inputs and relay outputs