Yaesu DR-2X and the S-COM 7330
See all DR-2X and DR-1X interface documentation here: http://www.scomcontrollers.com/yaesudr1x
[Update 11/18/2017] At S-COM, we've been testing the DR-2X with the S-COM 7330 repeater controllers. The DR-2X that I have has the external controller modification and the latest firmware.
Here's the two configurations that I have tested and work well: