Siemens GNP196.1P DAMPER ACTUATOR | SPRING RETURN | 24 VAC/DC | UNIVERSAL CONTROL INPUT | 53 LB-IN | SWSiemens GNP196. 1P Damper Actuator Spring Return 24 VAC DC Universal Control Input 53 lb in SWFail Safe, 53 lb in, 2 sec., 24Vac dc, universal control signal (two position, floating, 0 10Vdc 2 10Vdc, 4 20mA 0 20mA, Siemens proprietary FHC LRC pulsed), shaft diameter is 1 4 to 3 4 in. round or 1 4 to 1 2 in square, switches Additional Information Control or Fire Smoke TypeControl Damper Torque53 lb in Fail SafeYes Positioning signal0 or 2 to 10 Vdc , 0