The Dimmermaster 1224 TB (Terminal Block) wallmount dimmers are a rugged, full-featured set of dimmers. The dimmer has both Analog (0-10VDC) and DMX-512 available for control input. The input terminal block can be configured for three phase or single phase power. The terminals for load and power are located at the top for easy access. The Wall Mount dimmers hang on the wall via slotted holes on 16 inch centers. Temoving the cover plate gives access to the wiring, the removable control card, and the dual SSR power cubes. The breakers are conveniently located on the front panel for quick access. The status light, located on the center of the panel, between the breakers, indicates power and DMX presence.