I'm looking to buy the USB trigger module. Is there a command that will open the drawer without having to open the POSNowCashDrawer application directly? (ie. in CMD POSNowCashDrawer.exe -COM9)

The POSNow Cash Drawer OpenTool is only a testing tool designed for testing purposes and unfortunately we don't have any command that will allow you to open the cash drawer. It is simply a program sending a signal to the serial port, if you have any programming experience you should be able to create one easily.