In power-on state, keep the normally-open fire door in open mode. In the event of fire, receive the command from the monitor and automatically close the fire door to make the fire door ready for evacuation. The open and closed states of fire doors are displayed and these state data are reported to the electrically operated unit of the fire door monitor. Suitable for controlling normally open fire doors.

Models and specifications	ZTM-DH3318（65KG） （85KG） （120KG)
Outline dimensions	525 mm × 32 mm × 136 mm/625 mm × 32 mm × 136 mm (L × W × H)
Suitable door weight	Suitable for ≤ 65 kg/≤ 85 kg/≤ 120 kg
Suitable door width	Suitable for ≤ 830 mm/≤ 930 mm/≤ 1030 mm
Undulating voltage	18 VDC to 28 VDC
Communication mode	Two-wire system
Static current	＜ 300 uA Operating current＜2 mA
Closing buffer	Adjustable door closing/locking buffer
Installation method	Door pulling side
Opening angle	Keep the fire door open at 0 to 150 degrees
Operating environment	Temperature: -15°C to 55°C
Relative humidity	≤ 95% (40°C without condensation)