With the new motor control unit AM-830 we break new ground concerning safety curtain control. The AM-830 together with a central supply unit (SHEV®, ESM) will replace the known RSV-500 control unit in the future. The AM-830 will be placed directly to the roller of the Smoke PROtec® or Fire PROtec® curtain system and is, directed by a microcontroller, responsible to hold the curtain it its position and monitors it at unwinding in the case of fire.