The ETC ERP-DIM is a 300 W phase-adaptive dimmer accessory designed for use with the Unison Echo Relay Panel. Intended for lighting control applications that require dimming of compatible resistive or electronic loads, it provides an option for projects where panel-based control and expandable zone capacity are important. Its default reverse-phase operation makes it relevant for modern lighting environments using electronic load types within supported limits.

For integrators and specifiers building or expanding Echo Relay Panel systems, the ERP-DIM fits into ETC's panel ecosystem as an ordered dimmer module. The Echo Relay Panel platform supports up to 24 fully loaded dimmers, giving designers a path to scale dimming capacity across architectural and installed lighting projects. This makes the ERP-DIM a practical choice for commercial spaces, venues, and other controlled environments where centralized dimming is part of the system design.