I'm using a LabView controlled alarm system in my lab where an alarm condition triggers a USB DAQ analog output signal to switch from +5V to 0V. This signal is going to a sensaphone express II alarm box normally open relay input. The normally open relay input sees 5V as an open (no alarm condition) and 0V as a short (alarm). My problem is the my USB DAQ only has 5 analog output and I would like to have more. I don't want to spend a lot of money. Any suggestions on an inexpensive USB DAQ or PCI DAQ with similar functionality but more channels? Or better yet a way to get a similar effect straight out of the computer? Maybe USB? RS232?