CVI Melles Griot Rotor Drive Shutter Controller provides actuation signals to Rotor Drive shutters locally, through manual push button, or remotely, through TTL signal. The Rotor Drive Shutter controller is supplied with the adaptor cable to allow connecting the controller to any Rotor Drive shutter. The unit is powered by the 12 V power supply available separately. LOCAL OPERATION Pressing the manual pushbutton trigger switch will change the shutter state to the opposite, from open to close or from close to open depending on the original state. The shutter will remain in the new state until the pushbutton is pressed again. REMOTE OPERATION Applying a TTL pulse to the controller duplicates the function of the pushbutton. Changing the shutter state again requires a new TTL pulse.