The DSP1216 is a DMX512 controled Relay switchpack, which has basicly a  400V/16A three phase Mains supply with a maximum distribution power of 11kVA. The relay contacts has a nominal current of 20A and an inrush  current of 70A, so that fuses at the load outputs are not  necessary. Further on the DSP1216 has a 3 phase power switch for the  Main supply. As a special feature there is a 4 line Mains filter where  the hole supply- and load- current is going through.

Four of the 12  channels of the DSP1216 are assigned to one phase respectively (L1= 1-4,  L2= 5-8, L3= 9-12). If a line fails, the four attached channels also are without tension. In spite of this the DSP1216 is still working with  only one phase. Three LEDs directly next to the power switch  shows  whether all phases are available. A „Control“- LED shows if the internal  supply voltages are working well and the three rotary codeswitches are  used for the DMX- Start address [001-512], Test modes for the manual  check [901-920] and some special functions  (e.g. Mute [000]). The  Signal LED indicates using different blink timing whether a  DMX512-Signal is online (LED on) or is absent (short flashes) or a Test  mode  is running (blinking). A Group of 12 LED’s and miniature toggle  switches shows the relay status and make it possible to switch on a  channel manually. The toggle switch has priority in front of all modes!  (this includes Mute [000], too)