Product features

BACHSMOKE DHA is an automatic smokeproof curtain that restricts and controls the movement of smoke in the event of a fire, in addition to the DH120 classification. The curtain consists of: a fiberglass fabric with a polyurethane coating, sewn on both sides with reinforced steel wire and fastened to a steel roller with a diameter of 78mm; the upper box, side guides and lower bar elements are made of galvanized steel. The entire system is controlled by a 24 Vdc tubular motor and is controlled by an electronic board, BACH's CRM (Motor Control and Management) with a special gravity system in case of failure. Automatic curtain control panel (CBM), with a nominal input voltage of 115 Vac or 220 Vac and an output voltage of 24 Vdc. An uninterruptible power supply (UPS system) with an autonomy of up to 6 hours exists in all control panels. Tested and approved in accordance with European standard UNE EN 12101-1 and CE mark.


The system can be activated via SHEV, fire alarm contact, built-in fire and smoke detection devices, or manual emergency buttons. In the event of a fire, the BACH control panel (CBM) receives a signal alarm, and the automatic curtain is automatically activated, at a controlled and safe rate of descent even after a complete loss of power on all curtains. In the event of a false alarm, the curtain automatically returns to sleep mode after resetting the alarm from the main fire control system. In the event of a power failure, the curtains will remain fully raised for up to 6 hours thanks to BACH's battery backup system.


  • CBM control panel
  • BACH's tube engine 24Vdc
  • CRM Electronic control panel
  • Upper galvanized steel box
  • Galvanized steel roller
  • Galvanized steel lower bar
  • Smokeproof fabric
  • Galvanized steel side guides