The th-860 operator is specially designed for curved sliding doors. Available for bi-parting doors only The impressive and functional entrance A curved sliding door gives a wider opening than a flat sliding door and at the same time provides an impressive and enticing entrance Safety: Automatic safety auto reverse when an obstacle is encountered in closing direction.The safety can be further improved by using presence detection photocells. People or objects in the doorway are detected and the door is then prevented from closing until It is safe to do so Emergency The tc-880 can automatically opens or closes the doorsú¿using battery pack upú¬¿cin the event of a power failure.The th-860 can be interfaced with fire alarms Technical specifications: 2 leaves, bi-parting Power supply: 90 to 250v ac; 50/60hz Power consumption: 150w Recommended max. Door weight: 130kg x 2 Door width: 600 to 1, 067mm Opening speed: 100 to 500mm/s Closing speed: 100 to 500mm /s Hold open time: 0 to 9s Ambient temperature: -20ípc to 50ípc.