Greisinger usb 5100 interface converter for connecting devices 5xxx series greisinger usb 5100 p the greisinger usb 5100 is an interface converter for connecting the devices from the gmh 5xxx series to the usb port of a pc the adaptor contains an electrically isolated power supply for the gmh 5xxx p greisinger usb 5100 interface converter compatible with gmh 5530 gmh 5550