1,For operation of air control dampers in HVAC system 2,Torque:8Nm,16Nm,24Nm 3,Nominal voltage:AC/DC 24V 4,Control:Open/Clos Rotation angle : 0 - 90° (in 5° increments) Operating voltage : 24VAC/24VDC, 220VAC 50/60Hz 110VAC 50/60Hz Power rating : 6.5W , 7.5W Control input : Digital : On/off; 3-floating points, Analogue : modulating 0(2) ~ 10V/0(4) ~ 20mA proportional input Position output : 0(2) ...