Module Termination Units (MTUs) provide mounting and connectivity for SDe series control and I/O modules. The Evolution Mounting Chassis is a form, space-fit, functional replacement for a Harmony rack MMU. Mounting bases provide the host for SDe control and I/O modules when mounted in an evolution chassis or on a rail. To download a PDF OUTLINE of all modules in this section, or to COMPARE several items, use the options in the upper‑right corner of the page.