It requires a short (10ms maximum) pulse to actuate at +/- 5V. I haven't picked my NI hardware yet but I know I can generate the +/- 5V with many of the devices NI offers. I will also have access to a serial port on the computer and can probably use that (correct?). The part I don't know how to control is the duration of the pulse. Any ideas? Will I need to use a circuit that is controlled via Labview?