Two steps operating shutter for fire protection

Smoke detector :
1. It sends a signal in fire by detecting smoke.
2. The interlocking controller sends the 1st operating signal to the automatic closer.
3. The automatic closer is operated and then it is auto-restored after moving the shutter to the 1st stop point.

Heat detector :
1. It sends a signal in fire by detecting heat.
2. The interlocking controller sends the 2nd operating signal to the automatic closer.
3. The automatic closer is operated and then moves the shutter completely to the floor.

Smoke detector :
1. It sends a signal to the emergency room in fire once detecting smoke.
2. The emergency room sends 1st signal to the interlocking controller.
3. The shutter is dropped firstly after the closer operating. Therefore, it is closed partially to the sector without smoke. (It is auto-restored afterwards.)
4. 1st operating signal is sent to the emergency room.

Heat detector :
1. It sends a signal to the emergency room in fire once detecting heat.
2. The emergency room sends 2nd signal to the interlocking controller.
3. The shutter is dropped secondly after the closer operating. Therefore, it is closed completely.
4. 2nd operating signal is sent to the emergency room.