Type 15. 10 “Master” Dimmers output a 0-10 V/1-10 V master dimming signal to multiple lamp loads that accept this level of input signal. Pushbutton operated, the Type 15. 10 can control/drive up to 32 x Type 15. 11 slave dimmers or similar devices. By using a number of Type 15. 11 slave dimmers on different settings you can control, in unison, multiple lamps of differing technologies via a single 15. 10 master dimmer. Multi-function (with or without memory of light intensity, including a special function with memory for CFL lamps), Linear regulation, Dimmer speed adjustment, Staircase light function with switch-off warning by dimming the lamps, Power supply 230 V AC 50/60 Hz with automatic frequency recognition, NO 6 A contact, Width one module 17. 5 mm, 35 mm rail (EN 60715) mounting The Type 15. 10 Master dimmer can be used in 4-wire systems It also features soft on and off transitions and linear regulation. There is the option for settings, with or without memory of light intensity, and there is a staircase light function.